From development.engineering at xtra.co.nz  Wed Dec  1 09:39:02 2021
From: development.engineering at xtra.co.nz (GRAHAM CHRISTIE)
Date: Wed, 1 Dec 2021 22:39:02 +1300 (NZDT)
Subject: [chbot] Alt Energy ?
In-Reply-To: <2110701169.480846.1638338872037@webmail.xtra.co.nz>
References: <7174bed1-5356-ed97-60d1-628ab6ba2548@xtra.co.nz>
 <CAE21AQpV0CmU_LNApxUJkZ8eYEbHCp7SX1arN2V_VuZf5jm0Lw@mail.gmail.com>
 <2110701169.480846.1638338872037@webmail.xtra.co.nz>
Message-ID: <1723566347.507541.1638351542961@webmail.xtra.co.nz>


>     At Cashmere High School they have a device that is soft underfoot and generates energy from passing Students in the Science block.
> 
>     I have supported young people win prizes for being innovative such as the Student Bevin referenced.
>     But my approach or point of view was slightly different.
> 
>     I was asked previously from a set of judges to evaluate an idea from a young guy from a technical point of view. (funny enough it also was for electricity for Africa)
>     On the face of it, it was a good idea for the average man on the street but in the end I said it will fail and gave my reasons.
>     But I said he should win the prize and the money (which he did) that came with it because he as a person should be supported and encouraged.
>     I said he will do this and fail and will learn, then he will do something else and he may succeed in the next idea.
> 
>     So I can pick technical holes in young peoples ideas all day long but the big picture is these people need supporting because one day they may come up with a real gem and we as society may benefit from it.
> 
>     Regards
>     Graham
> 
> 
> 
> 
> 
> 
>         > >         On 01/12/2021 08:53 Charles Manning <cdhmanning at gmail.com> wrote:
> > 
> > 
> >         There is no "free" energy. This is just adding drag and extracting energy from other sources.
> >         Yes, due to harmonics etc it would be far more efficient to:
> >         * Fix the road so that the vehicles have a smoother and more efficient ride.
> >         * Use a portion of the saved fuel to run a generator.
> > 
> >         But these are the days of woke. Emotion beats the laws of physics.
> > 
> > 
> >         On Wed, Dec 1, 2021 at 7:46 AM Mark Atherton <markaren1 at xtra.co.nz mailto:markaren1 at xtra.co.nz > wrote:
> > 
> >             > > > Bevin posted a notice about this...
> > > 
> > >             https://www.globalteacherprize.org/global-student-prize/jeremiah-thoronka-2021-winner
> > > 
> > >             "Jeremiah Thoronka, a student from Sierra Leone, who invented a device
> > >             that uses kinetic energy from traffic and pedestrians to generate clean
> > >             power, has been named the winner of the Chegg.org Global Student Prize
> > >             2021".
> > > 
> > >             At first blush, it sounds like third-world countries have unstable
> > >             roadways, where passing traffic shakes-things-up-a-bit. This wasted
> > >             energy could then be harvested by (for example) burying a huge mass
> > >             under the road, and using differential movement to generate power.
> > > 
> > >             Taking my wild speculation as reasonable for a moment, and call me
> > >             stupid if you like, but if the roads were improved, surely the
> > >             improvement of fuel efficiency of the associated with the road-traffic
> > >             would far exceed any small percentage of the wasted energy transferred
> > >             into the ground ??
> > > 
> > >             Thoughts please !!
> > > 
> > >             -Mark
> > > 
> > > 
> > > 
> > >             _______________________________________________
> > >             Chchrobotics mailing list Chchrobotics at lists.ourshack.com mailto:Chchrobotics at lists.ourshack.com
> > >             https://lists.ourshack.com/mailman/listinfo/chchrobotics
> > >             Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> > >             Meetings usually 3rd Monday each month. See http://kiwibots.org for venue, directions and dates.
> > >             When replying, please edit your Subject line to reflect new subjects.
> > > 
> > >         > >         _______________________________________________
> >         Chchrobotics mailing list Chchrobotics at lists.ourshack.com
> >         https://lists.ourshack.com/mailman/listinfo/chchrobotics
> >         Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> >         Meetings usually 3rd Monday each month. See http://kiwibots.org for venue, directions and dates.
> >         When replying, please edit your Subject line to reflect new subjects.
> > 
> >     > 
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From ceo at andygardner.com  Wed Dec  1 10:09:13 2021
From: ceo at andygardner.com (ceo at andygardner.com)
Date: Wed, 1 Dec 2021 23:09:13 +1300
Subject: [chbot] Alt Energy ?
In-Reply-To: <1723566347.507541.1638351542961@webmail.xtra.co.nz>
References: <7174bed1-5356-ed97-60d1-628ab6ba2548@xtra.co.nz>
 <CAE21AQpV0CmU_LNApxUJkZ8eYEbHCp7SX1arN2V_VuZf5jm0Lw@mail.gmail.com>
 <2110701169.480846.1638338872037@webmail.xtra.co.nz>
 <1723566347.507541.1638351542961@webmail.xtra.co.nz>
Message-ID: <95592d3b-5365-6034-8f0d-41c5da83c5c1@andygardner.com>


Also, seeing this article could convince a multitude of disadvantaged kids to pursue a career in STEM. Which would be a good thing.


On 1/12/21 10:39 pm, GRAHAM CHRISTIE wrote:
> 
>> At Cashmere High School they have a device that is soft underfoot and generates energy from passing Students in the Science block.
>>
>> I have supported young people win prizes for being innovative such as the Student Bevin referenced.
>> But my approach or point of view was slightly different.
>>
>> I was asked previously from a set of judges to evaluate an idea from a young guy from a technical point of view. (funny enough it also was for electricity for Africa)
>> On the face of it, it was a good idea for the average man on the street but in the end I said it will fail and gave my reasons.
>> But I said he should win the prize and the money (which he did) that came with it because he as a person should be supported and encouraged.
>> I said he will do this and fail and will learn, then he will do something else and he may succeed in the next idea.
>>
>> So I can pick technical holes in young peoples ideas all day long but the big picture is these people need supporting because one day they may come up with a real gem and we as society may benefit from it.
>>
>> Regards
>> Graham



From markaren1 at xtra.co.nz  Sun Dec  5 07:57:07 2021
From: markaren1 at xtra.co.nz (Mark Atherton)
Date: Sun, 5 Dec 2021 20:57:07 +1300
Subject: [chbot] Special Lecture: F-22 Flight Controls
In-Reply-To: <bb09741e-f731-beb4-69a8-51051a3eca68@xtra.co.nz>
References: <bb09741e-f731-beb4-69a8-51051a3eca68@xtra.co.nz>
Message-ID: <7adac989-9850-3192-dcdc-33fe5ad0bdc6@xtra.co.nz>

https://www.youtube.com/watch?v=n068fel-W9I

MIT offer quite a range of open courses, this one is quite fun.

-Mark



From ewblen at e.email  Mon Dec  6 01:53:42 2021
From: ewblen at e.email (Eliot)
Date: Mon, 6 Dec 2021 14:53:42 +1300
Subject: [chbot] Sunbeam radiant control toaster
Message-ID: <bc9c95ec-1cfb-5738-b2f3-bcbb878c5b86@e.email>

I'm pretty sure members of this group will appreciate this fine work of
electromechanical engineering from the mid 20th century

https://www.youtube.com/watch?v=1OfxlSG6q5Y

-- 
Eliot
(50-something year old owner of a 50-something year old toaster)


From jasper.mackenzie at gmail.com  Mon Dec  6 02:32:52 2021
From: jasper.mackenzie at gmail.com (Jasper Mackenzie)
Date: Mon, 06 Dec 2021 15:32:52 +1300
Subject: [chbot] Sunbeam radiant control toaster
In-Reply-To: <bc9c95ec-1cfb-5738-b2f3-bcbb878c5b86@e.email>
References: <bc9c95ec-1cfb-5738-b2f3-bcbb878c5b86@e.email>
Message-ID: <26639840-2E4E-4F81-9C1C-804A2E046082@gmail.com>

Wow! Just wow!
 Thanks.
So is the moral here wrt robotics "try an elegant mechanical solution first" 😂

On 6 December 2021 2:53:42 pm NZDT, Eliot <ewblen at e.email> wrote:
>I'm pretty sure members of this group will appreciate this fine work of
>electromechanical engineering from the mid 20th century
>
>https://www.youtube.com/watch?v=1OfxlSG6q5Y
>
>-- 
>Eliot
>(50-something year old owner of a 50-something year old toaster)
>
>_______________________________________________
>Chchrobotics mailing list Chchrobotics at lists.ourshack.com
>https://lists.ourshack.com/mailman/listinfo/chchrobotics
>Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
>Meetings usually 3rd Monday each month. See http://kiwibots.org for venue, directions and dates.
>When replying, please edit your Subject line to reflect new subjects.
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From jasper.mackenzie at gmail.com  Mon Dec  6 02:32:52 2021
From: jasper.mackenzie at gmail.com (Jasper Mackenzie)
Date: Mon, 06 Dec 2021 15:32:52 +1300
Subject: [chbot] Sunbeam radiant control toaster
In-Reply-To: <bc9c95ec-1cfb-5738-b2f3-bcbb878c5b86@e.email>
References: <bc9c95ec-1cfb-5738-b2f3-bcbb878c5b86@e.email>
Message-ID: <26639840-2E4E-4F81-9C1C-804A2E046082@gmail.com>

Wow! Just wow!
 Thanks.
So is the moral here wrt robotics "try an elegant mechanical solution first" 😂

On 6 December 2021 2:53:42 pm NZDT, Eliot <ewblen at e.email> wrote:
>I'm pretty sure members of this group will appreciate this fine work of
>electromechanical engineering from the mid 20th century
>
>https://www.youtube.com/watch?v=1OfxlSG6q5Y
>
>-- 
>Eliot
>(50-something year old owner of a 50-something year old toaster)
>
>_______________________________________________
>Chchrobotics mailing list Chchrobotics at lists.ourshack.com
>https://lists.ourshack.com/mailman/listinfo/chchrobotics
>Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
>Meetings usually 3rd Monday each month. See http://kiwibots.org for venue, directions and dates.
>When replying, please edit your Subject line to reflect new subjects.
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From markaren1 at xtra.co.nz  Tue Dec 14 08:53:32 2021
From: markaren1 at xtra.co.nz (Mark Atherton)
Date: Tue, 14 Dec 2021 21:53:32 +1300
Subject: [chbot] Solar panel, side reflectors
Message-ID: <56e99e27-d020-59cb-deac-cf7fe82aa975@xtra.co.nz>

https://www.youtube.com/watch?v=FKhszB4E1_M

Quite an interesting video.

-Mark

PS don't forget the Robotics Xmas special coming up on the 20th Dec.



From gb7ipd at gmail.com  Tue Dec 14 09:55:05 2021
From: gb7ipd at gmail.com (Robin Gilks)
Date: Tue, 14 Dec 2021 22:55:05 +1300
Subject: [chbot] Solar panel, side reflectors
In-Reply-To: <56e99e27-d020-59cb-deac-cf7fe82aa975@xtra.co.nz>
References: <56e99e27-d020-59cb-deac-cf7fe82aa975@xtra.co.nz>
Message-ID: <CAPfE9Ujrrq7_svas9-QyFib7hfxdU2h3ygxEA-BXF-vKmhr85A@mail.gmail.com>

I was waiting for his shirt to burst into flame as he waved that big lens
about :)

If he is as stingy with his facts on this one as his last video with the
hot water heating vs PV then a good hard look at the overall system costs
would be appropriate.

PV for hot water:

   - uses existing cylinder
   - uses existing heating element
   - built in backup if no sun
   - only requires a DC rated contactor with the existing thermostat
   - cables are easier to run than pipes

Thermal for hot water

   - needs a new cylinder
   - expensive pipe-work to the roof
   - steam vents required for when max temperature reached
   - controller with sensors in the cylinder and on the roof
   - frost protection or antifreeze and an even more expensive indirect
   coil cylinder
   - mains power required for a pump (unless one of those tanks on the roof
   systems is used - not good in an earthquake zone!)

Based on current pricing a 3kw equivalent system has the PV at less than
half the price!


On Tue, Dec 14, 2021 at 9:53 PM Mark Atherton <markaren1 at xtra.co.nz> wrote:

> https://www.youtube.com/watch?v=FKhszB4E1_M
>
> Quite an interesting video.
>
> -Mark
>
> PS don't forget the Robotics Xmas special coming up on the 20th Dec.
>
>
> _______________________________________________
> Chchrobotics mailing list Chchrobotics at lists.ourshack.com
> https://lists.ourshack.com/mailman/listinfo/chchrobotics
> Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> Meetings usually 3rd Monday each month. See http://kiwibots.org for
> venue, directions and dates.
> When replying, please edit your Subject line to reflect new subjects.
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From development.engineering at xtra.co.nz  Tue Dec 14 12:37:24 2021
From: development.engineering at xtra.co.nz (GRAHAM CHRISTIE)
Date: Wed, 15 Dec 2021 01:37:24 +1300 (NZDT)
Subject: [chbot] Solar panel, side reflectors
In-Reply-To: <CAPfE9Ujrrq7_svas9-QyFib7hfxdU2h3ygxEA-BXF-vKmhr85A@mail.gmail.com>
References: <56e99e27-d020-59cb-deac-cf7fe82aa975@xtra.co.nz>
 <CAPfE9Ujrrq7_svas9-QyFib7hfxdU2h3ygxEA-BXF-vKmhr85A@mail.gmail.com>
Message-ID: <506733489.283473.1639485444933@webmail.xtra.co.nz>

Those Fresnel lenses can be fun to play with, I had a 1000mm diameter one and it was instant flames on wood, melting tar seal, plastic bins and pity help any skin, actually a bit dangerous.

Regards
Graham

>     On 14/12/2021 22:55 Robin Gilks <gb7ipd at gmail.com> wrote:
> 
> 
>     I was waiting for his shirt to burst into flame as he waved that big lens about :)
> 
>     If he is as stingy with his facts on this one as his last video with the hot water heating vs PV then a good hard look at the overall system costs would be appropriate.
> 
>     PV for hot water:
>         * uses existing cylinder
>         * uses existing heating element
>         * built in backup if no sun
>         * only requires a DC rated contactor with the existing thermostat
>         * cables are easier to run than pipes
>     Thermal for hot water
>         * needs a new cylinder
>         * expensive pipe-work to the roof
>         * steam vents required for when max temperature reached
>         * controller with sensors in the cylinder and on the roof
>         * frost protection or antifreeze and an even more expensive indirect coil cylinder
>         * mains power required for a pump (unless one of those tanks on the roof systems is used - not good in an earthquake zone!)
>     Based on current pricing a 3kw equivalent system has the PV at less than half the price!
>      
> 
>     On Tue, Dec 14, 2021 at 9:53 PM Mark Atherton <markaren1 at xtra.co.nz mailto:markaren1 at xtra.co.nz > wrote:
> 
>         > > https://www.youtube.com/watch?v=FKhszB4E1_M
> > 
> >         Quite an interesting video.
> > 
> >         -Mark
> > 
> >         PS don't forget the Robotics Xmas special coming up on the 20th Dec.
> > 
> > 
> >         _______________________________________________
> >         Chchrobotics mailing list Chchrobotics at lists.ourshack.com mailto:Chchrobotics at lists.ourshack.com
> >         https://lists.ourshack.com/mailman/listinfo/chchrobotics
> >         Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> >         Meetings usually 3rd Monday each month. See http://kiwibots.org for venue, directions and dates.
> >         When replying, please edit your Subject line to reflect new subjects.
> > 
> >     >     _______________________________________________
>     Chchrobotics mailing list Chchrobotics at lists.ourshack.com
>     https://lists.ourshack.com/mailman/listinfo/chchrobotics
>     Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
>     Meetings usually 3rd Monday each month. See http://kiwibots.org for venue, directions and dates.
>     When replying, please edit your Subject line to reflect new subjects.
> 
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From ceo at andygardner.com  Tue Dec 14 12:40:30 2021
From: ceo at andygardner.com (ceo at andygardner.com)
Date: Wed, 15 Dec 2021 01:40:30 +1300
Subject: [chbot] Solar panel, side reflectors
In-Reply-To: <506733489.283473.1639485444933@webmail.xtra.co.nz>
References: <56e99e27-d020-59cb-deac-cf7fe82aa975@xtra.co.nz>
 <CAPfE9Ujrrq7_svas9-QyFib7hfxdU2h3ygxEA-BXF-vKmhr85A@mail.gmail.com>
 <506733489.283473.1639485444933@webmail.xtra.co.nz>
Message-ID: <285d4d36-90d9-a78d-f1d9-2b6db2920f5f@andygardner.com>


I think this is where Rudy pipes up with an amusing anecdote...

On 15/12/21 1:37 am, GRAHAM CHRISTIE wrote:
> Those Fresnel lenses can be fun to play with, I had a 1000mm diameter one and it was instant flames on wood, melting tar seal, plastic bins and pity help any skin, actually a bit dangerous.
> 
> Regards
> Graham



From markaren1 at xtra.co.nz  Tue Dec 14 18:52:23 2021
From: markaren1 at xtra.co.nz (Mark Atherton)
Date: Wed, 15 Dec 2021 07:52:23 +1300
Subject: [chbot] 365nm LED strip
Message-ID: <ea4d26cd-3734-20c7-c526-4117bb2329e9@xtra.co.nz>

This is a long shot...

Anyone know a local supplier of 365nm LED tape ?

-Mark

PS 395nm is readily available, but that won't do the job.



From rudy.kremers at racingworld.com  Tue Dec 14 19:02:28 2021
From: rudy.kremers at racingworld.com (rudy.kremers@123gaming.com)
Date: Tue, 14 Dec 2021 19:02:28 +0000
Subject: [chbot] Solar panel, side reflectors
In-Reply-To: <285d4d36-90d9-a78d-f1d9-2b6db2920f5f@andygardner.com>
References: <56e99e27-d020-59cb-deac-cf7fe82aa975@xtra.co.nz>
 <CAPfE9Ujrrq7_svas9-QyFib7hfxdU2h3ygxEA-BXF-vKmhr85A@mail.gmail.com>
 <506733489.283473.1639485444933@webmail.xtra.co.nz>
 <285d4d36-90d9-a78d-f1d9-2b6db2920f5f@andygardner.com>
Message-ID: <AM6PR08MB3319BA50F1BD26423351DF4486759@AM6PR08MB3319.eurprd08.prod.outlook.com>

Yes... I did a show and tell with a fresnell lens at school once upon a time..
The basket ball court didnt like the excess heat.
Luckily, working at citycare meant I had access to asphalt and could get it repaired easily enough.

I do love those fresnells. :-)


Sent from my Galaxy



-------- Original message --------
From: ceo at andygardner.com
Date: 15/12/21 1:40 AM (GMT+12:00)
To: chchrobotics at lists.ourshack.com
Subject: Re: [chbot] Solar panel, side reflectors


I think this is where Rudy pipes up with an amusing anecdote...

On 15/12/21 1:37 am, GRAHAM CHRISTIE wrote:
> Those Fresnel lenses can be fun to play with, I had a 1000mm diameter one and it was instant flames on wood, melting tar seal, plastic bins and pity help any skin, actually a bit dangerous.
>
> Regards
> Graham


_______________________________________________
Chchrobotics mailing list Chchrobotics at lists.ourshack.com
https://lists.ourshack.com/mailman/listinfo/chchrobotics
Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
Meetings usually 3rd Monday each month. See http://kiwibots.org for venue, directions and dates.
When replying, please edit your Subject line to reflect new subjects.
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From helmut.walle at gmail.com  Wed Dec 15 07:47:25 2021
From: helmut.walle at gmail.com (Helmut Walle)
Date: Wed, 15 Dec 2021 20:47:25 +1300
Subject: [chbot] Solar panel, side reflectors
In-Reply-To: <CAPfE9Ujrrq7_svas9-QyFib7hfxdU2h3ygxEA-BXF-vKmhr85A@mail.gmail.com>
References: <56e99e27-d020-59cb-deac-cf7fe82aa975@xtra.co.nz>
 <CAPfE9Ujrrq7_svas9-QyFib7hfxdU2h3ygxEA-BXF-vKmhr85A@mail.gmail.com>
Message-ID: <f6d70cf4-a701-ac75-144f-1a725a85a29c@gmail.com>

Regarding that point below, it would be fair to mention that these cylinders for solar-thermal
are actually performing about twice the storage functionality per volume as compared to the
usual electrically powered cylinders, because the cylinders for solar-thermal heating are
running at up to 120C under light pressure. So yes, they do cost a bit more, but they are
probably still beating a battery in terms of long-term TCO for storage...

I know quite a few people in NZ and Germany who have solar-thermal hot water systems and are
very happy with their mileage and performance, even after over 20 years of operation.

Kind regards,

Helmut.

On 14/12/2021 22:55, Robin Gilks wrote:
[...]
> 
> Thermal for hot water
> 
>   * needs a new cylinder
[...]


From markaren1 at xtra.co.nz  Fri Dec 17 03:45:15 2021
From: markaren1 at xtra.co.nz (Mark Atherton)
Date: Fri, 17 Dec 2021 16:45:15 +1300
Subject: [chbot] Robotics Group meeting, 5 Idris Road, 6:30pm,
 Monday 20 Dec 2021
In-Reply-To: <a4d52ee7-3876-c41b-0a5e-f8d91014744b@xtra.co.nz>
References: <a4d52ee7-3876-c41b-0a5e-f8d91014744b@xtra.co.nz>
Message-ID: <c5605833-834e-1cf9-fd5a-088f2f46fae0@xtra.co.nz>

Hi All,

Please bring along any projects that you have been working on, along 
with a healthy curiosity, and maybe some off-the-wall ideas and suggestions.

Door will be open at 6:30pm, but earlier if situation permits. The 
evening will start with an informal get together. At around 7:15 we move 
onto the talks-from-the-front.

Happy to accept electrical/electronic donations for our host club's 
trading table, but they can't accept product with significant amounts of 
glass, plastic or wood such as CRT TVs, CRT monitors, printers, or 
document scanners.

All proceeds from the evening go directly to our host club, Christchurch 
Amateur Radio club, NZART BR05.

Feel free to forward this notice to anyone who you think might be 
interested in visiting us : "as well as an interest in all things 
robotic, we have a membership with interests ranging from radio, 
embedded computing (including Arduino, Raspberry Pi), FPGA design, solar 
power, and electric vehicles, to name but a few".

As usual, guests are most welcome, so please bring friends. Also, this 
is a very low-key event with people arriving and leaving as they feel fit.

Seasonal silly hats, and bad puns are always welcome :)

If we haven't seen you for a while, why not pop in and say hello, even 
if you can't stop for the whole evening.

Hope to see you there.

Regards, Mark

PS if you have any copper wire or cable, or scrap aluminium that you 
could like to donate, please consider bringing it along to the meeting. 
Our host club has regular runs to the scrap yard, and this is a real 
money-spinner for them.




From list57 at top.geek.nz  Fri Dec 17 20:47:29 2021
From: list57 at top.geek.nz (Volker Kuhlmann)
Date: Sat, 18 Dec 2021 09:47:29 +1300
Subject: [chbot] Robotics Group meeting, 5 Idris Road, 6:30pm,
 Monday 20 Dec 2021
In-Reply-To: <c5605833-834e-1cf9-fd5a-088f2f46fae0@xtra.co.nz>
References: <a4d52ee7-3876-c41b-0a5e-f8d91014744b@xtra.co.nz>
 <c5605833-834e-1cf9-fd5a-088f2f46fae0@xtra.co.nz>
Message-ID: <20211217204729.GA22722@top.geek.nz>

Thank you Mark.

Dare I ask, what are the antivirus measures (beyond contact tracing)?
Thanks.

Volker

-- 
Volker Kuhlmann
http://volker.top.geek.nz/	Please do not CC list postings to me.


From markaren1 at xtra.co.nz  Fri Dec 17 21:18:57 2021
From: markaren1 at xtra.co.nz (Mark Atherton)
Date: Sat, 18 Dec 2021 10:18:57 +1300 (NZDT)
Subject: [chbot] Robotics Group meeting, 5 Idris Road, 6:30pm,
 Monday 20 Dec 2021
In-Reply-To: <20211217204729.GA22722@top.geek.nz>
References: <a4d52ee7-3876-c41b-0a5e-f8d91014744b@xtra.co.nz>
 <c5605833-834e-1cf9-fd5a-088f2f46fae0@xtra.co.nz>
 <20211217204729.GA22722@top.geek.nz>
Message-ID: <1573623032.397316.1639775937738@webmail.xtra.co.nz>

Hi Volker,

At the moment, under Orange we are following the host club's lead of not requiring vaccine passes provided that there are less than 50 members present.

HTH,

Mark


> On 18/12/2021 09:47 Volker Kuhlmann <list57 at top.geek.nz> wrote:
> 
>  
> Thank you Mark.
> 
> Dare I ask, what are the antivirus measures (beyond contact tracing)?
> Thanks.
> 
> Volker
> 
> -- 
> Volker Kuhlmann
> http://volker.top.geek.nz/	Please do not CC list postings to me.
> 
> _______________________________________________
> Chchrobotics mailing list Chchrobotics at lists.ourshack.com
> https://lists.ourshack.com/mailman/listinfo/chchrobotics
> Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> Meetings usually 3rd Monday each month. See http://kiwibots.org for venue, directions and dates.
> When replying, please edit your Subject line to reflect new subjects.


From markaren1 at xtra.co.nz  Sun Dec 19 01:56:30 2021
From: markaren1 at xtra.co.nz (Mark Atherton)
Date: Sun, 19 Dec 2021 14:56:30 +1300
Subject: [chbot] Youtube: Project Binky - Episode 37 just released
Message-ID: <1941a8f1-430b-c736-02b1-7aecfe28c953@xtra.co.nz>

Also, please join us for the last Robotics of the year Monday evening.

-Mark



From gb7ipd at gmail.com  Sun Dec 19 03:08:29 2021
From: gb7ipd at gmail.com (Robin Gilks)
Date: Sun, 19 Dec 2021 16:08:29 +1300
Subject: [chbot] Youtube: Project Binky - Episode 37 just released
In-Reply-To: <1941a8f1-430b-c736-02b1-7aecfe28c953@xtra.co.nz>
References: <1941a8f1-430b-c736-02b1-7aecfe28c953@xtra.co.nz>
Message-ID: <CAPfE9UgBfyHyro0EUrKdyWXeH9NWfCfK-cYqubkCQ+Q9pBreiA@mail.gmail.com>

Good  to see they are only 18 months behind where they wanted to be 3 years
ago !!


On Sun, Dec 19, 2021 at 2:57 PM Mark Atherton <markaren1 at xtra.co.nz> wrote:

> Also, please join us for the last Robotics of the year Monday evening.
>
> -Mark
>
>
> _______________________________________________
> Chchrobotics mailing list Chchrobotics at lists.ourshack.com
> https://lists.ourshack.com/mailman/listinfo/chchrobotics
> Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> Meetings usually 3rd Monday each month. See http://kiwibots.org for
> venue, directions and dates.
> When replying, please edit your Subject line to reflect new subjects.
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From markaren1 at xtra.co.nz  Sun Dec 19 08:58:07 2021
From: markaren1 at xtra.co.nz (Mark Atherton)
Date: Sun, 19 Dec 2021 21:58:07 +1300
Subject: [chbot] Microscope slides wanted
Message-ID: <894ed248-d44d-6d20-f172-f74b0fdbf801@xtra.co.nz>

Does anyone have any spare that they could bring along to the meeting 
tomorrow evening ?

Looking for around 10pcs, standard size.

Thanks,

Mark


From bryashman at gmail.com  Sun Dec 19 09:01:47 2021
From: bryashman at gmail.com (Bry Ashman)
Date: Sun, 19 Dec 2021 22:01:47 +1300
Subject: [chbot] Microscope slides wanted
In-Reply-To: <894ed248-d44d-6d20-f172-f74b0fdbf801@xtra.co.nz>
References: <894ed248-d44d-6d20-f172-f74b0fdbf801@xtra.co.nz>
Message-ID: <CAAmhjuMEy6zr3hA7SvZxwLaWgLL5dLr+9gD87QAJGA1R0pSQFA@mail.gmail.com>

I have some plain 75x25x1mm if that works?

On Sun, 19 Dec 2021, 21:58 Mark Atherton, <markaren1 at xtra.co.nz> wrote:

> Does anyone have any spare that they could bring along to the meeting
> tomorrow evening ?
>
> Looking for around 10pcs, standard size.
>
> Thanks,
>
> Mark
>
> _______________________________________________
> Chchrobotics mailing list Chchrobotics at lists.ourshack.com
> https://lists.ourshack.com/mailman/listinfo/chchrobotics
> Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> Meetings usually 3rd Monday each month. See http://kiwibots.org for
> venue, directions and dates.
> When replying, please edit your Subject line to reflect new subjects.
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From markaren1 at xtra.co.nz  Sun Dec 19 17:52:00 2021
From: markaren1 at xtra.co.nz (Mark Atherton)
Date: Mon, 20 Dec 2021 06:52:00 +1300
Subject: [chbot] Microscope slides wanted
In-Reply-To: <CAAmhjuMEy6zr3hA7SvZxwLaWgLL5dLr+9gD87QAJGA1R0pSQFA@mail.gmail.com>
References: <894ed248-d44d-6d20-f172-f74b0fdbf801@xtra.co.nz>
 <CAAmhjuMEy6zr3hA7SvZxwLaWgLL5dLr+9gD87QAJGA1R0pSQFA@mail.gmail.com>
Message-ID: <b44c158d-ec0f-cfda-e80e-23c4531f05df@xtra.co.nz>

Great, thanks.

On 19/12/2021 10:01 PM, Bry Ashman wrote:
> I have some plain 75x25x1mm if that works?
> 
> On Sun, 19 Dec 2021, 21:58 Mark Atherton, <markaren1 at xtra.co.nz 
> <mailto:markaren1 at xtra.co.nz>> wrote:
> 
>     Does anyone have any spare that they could bring along to the meeting
>     tomorrow evening ?
> 
>     Looking for around 10pcs, standard size.
> 
>     Thanks,
> 
>     Mark
> 
>     _______________________________________________
>     Chchrobotics mailing list Chchrobotics at lists.ourshack.com
>     <mailto:Chchrobotics at lists.ourshack.com>
>     https://lists.ourshack.com/mailman/listinfo/chchrobotics
>     Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
>     Meetings usually 3rd Monday each month. See http://kiwibots.org for
>     venue, directions and dates.
>     When replying, please edit your Subject line to reflect new subjects.
> 
> 
> _______________________________________________
> Chchrobotics mailing list Chchrobotics at lists.ourshack.com
> https://lists.ourshack.com/mailman/listinfo/chchrobotics
> Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> Meetings usually 3rd Monday each month. See http://kiwibots.org for venue, directions and dates.
> When replying, please edit your Subject line to reflect new subjects.
> 



From markaren1 at xtra.co.nz  Mon Dec 20 09:12:39 2021
From: markaren1 at xtra.co.nz (Mark Atherton)
Date: Mon, 20 Dec 2021 22:12:39 +1300
Subject: [chbot] Robotics Group meeting, 5 Idris Rd, 6-30pm,
 Monday 20 Dec 2021
Message-ID: <83ea44c2-51ab-10f0-106f-8cd79a8add57@xtra.co.nz>

Robotics Group meeting, 5 Idris Rd, 6-30pm, Monday 20 Dec 2021

Hello everyone,

Good turnout with 20 attendees, and lots of huddles-of tech-talk. $24 + 
change (in gold, and flat-money) collected and transferred into the 
robotics loose-change jar (for later banking).

All sales from the trading table should go into the brown box on the 
wall, and are directly for the benefit of our host club, Christchurch 
Amateur Radio Club, NZART Branch 05.

Equipment donations are welcome for the trading table, but no CRT based 
product, printers, toner or items that are likely to be a disposal burden.

With thanks on behalf of the group,

Mark Atherton

Russel kindly donated some huge cracked, but working solar panels. These 
were almost immediately purchased by keen member who loaded the brown 
box on the wall with pieces-of-eight.

Graham kindly donated several huge moving LED text indicators. These 
were swallowed up in a similar manner as above.

Evening started by passing around a solenoid-driven EHT safety discharge 
assembly.

First talk was by Mark on the subject of over-voltage Drain protection 
of a broadband LDMOS push-pull RF power amplifier. Standing DC + 
rectified RF on the Drain was used to fire an SCR should Drain voltage 
exceed +66V. The SCR shorted out the 5V bias regulator(!) removing Gate 
bias from the LDMOS device, thus closing it down.

There was a brief video on the subject of destroying a Tesla E type 
using a few kilos of C4. Rather festive.

William demonstrated his latest home-made serial ‘286 plug in card (4 
layer, gold plated) based on a 16550. Also, a demonstration of the DOS 
based 286 diagnostics.

Rudy gave a demonstration of an air-cannon, with visualization provided 
by a smoke generator. Hopefully the smoke will clear soon J

Andy gave a talk about a high-pressure gas-management system associated 
with an air-conditioner. The gas valves were managed by magnetic 
coupling. Very neat solution to a tricky probelsm.

Bevin brought in a (large) rotary slide rule he found at a local surplus 
store. Amazing technology good for 5-digit resolution, and apparently 
used up until the 1960.

Michael talked about the latest work on his oil-mist powered casting 
furnace. Burning oil-mist will allow the associated crucible to reach 
much higher temperatures than is easily possible using a 230V/20A 
electric heater, and using waste oil. This is going to be quite 
something to behold when it is powered up.

Robin talked about his exploration into Embedded Trace Macrocell (ETM) 
of the Cortex 3 series (and above) STM32s. The ETM can be configured 
using and external debugger, or programmatically, and can provide a 
whole wealth of real-time CPU health and status information.


From markaren1 at xtra.co.nz  Mon Dec 20 19:28:28 2021
From: markaren1 at xtra.co.nz (Mark Atherton)
Date: Tue, 21 Dec 2021 08:28:28 +1300
Subject: [chbot] log4J exploit
Message-ID: <85afde5f-bdf6-d5ab-f882-74e98a6691b0@xtra.co.nz>

Just had an exciting conversation with a friend about this new exploit.

Does anyone have a summary of the exploit from a users perspective, 
consequences, and required actions.

All of the stuff I have found so far seems to revolve around apocalypse 
at the server level.

Thanks,

Mark


From fleetwil at gmail.com  Mon Dec 20 19:36:10 2021
From: fleetwil at gmail.com (william fleete)
Date: Tue, 21 Dec 2021 08:36:10 +1300
Subject: [chbot] log4J exploit
In-Reply-To: <85afde5f-bdf6-d5ab-f882-74e98a6691b0@xtra.co.nz>
References: <85afde5f-bdf6-d5ab-f882-74e98a6691b0@xtra.co.nz>
Message-ID: <CAFNRJjxzS5WbXkni6AmjvkiXFSaSwnc257nDLpsdEgm4Rm4vsw@mail.gmail.com>

There is this video from liveoverflow that talks a bit about it
https://youtu.be/w2F67LbEtnk

On Tue, 21 Dec 2021 at 08:28, Mark Atherton <markaren1 at xtra.co.nz> wrote:

> Just had an exciting conversation with a friend about this new exploit.
>
> Does anyone have a summary of the exploit from a users perspective,
> consequences, and required actions.
>
> All of the stuff I have found so far seems to revolve around apocalypse
> at the server level.
>
> Thanks,
>
> Mark
>
> _______________________________________________
> Chchrobotics mailing list Chchrobotics at lists.ourshack.com
> https://lists.ourshack.com/mailman/listinfo/chchrobotics
> Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> Meetings usually 3rd Monday each month. See http://kiwibots.org for
> venue, directions and dates.
> When replying, please edit your Subject line to reflect new subjects.
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From ceo at andygardner.com  Tue Dec 21 21:54:46 2021
From: ceo at andygardner.com (ceo at andygardner.com)
Date: Wed, 22 Dec 2021 10:54:46 +1300
Subject: [chbot] Speaking of GIF and JPG, meet QOI
Message-ID: <5aebc3f1-b49c-c68c-fba3-ee26fbc92ddf@andygardner.com>


https://www.theregister.com/2021/12/21/quite_ok_image_format/



From marshland at marshland.co.nz  Tue Dec 28 03:38:41 2021
From: marshland at marshland.co.nz (Marshland Engineering)
Date: Tue, 28 Dec 2021 16:38:41 +1300
Subject: [chbot] What board and OS to use.
In-Reply-To: <mailman.3.1640174401.1350.chchrobotics@lists.ourshack.com>
References: <mailman.3.1640174401.1350.chchrobotics@lists.ourshack.com>
Message-ID: <558196848660337690@marshland.co.nz>

I'm getting more into CNC stuff and need to have a PC at each machine to
download the G-Code files. Its nice to be able to view the files and maybe do
some editing at the machine so I need a PC type machine. 

I use 4 main programs Turbocad, Sheetcam, Candle and my own propitiatory stuff
written in Delphi.

In the workshop, fan less is a real boon as there is cutting fluids, dust etc
which buildup over time. Small laptops are not ideal but its what I'm using
now.    

Now I have a few PIs around the place doing some jobs which work well. SQL
server, Backup drive and TV control.

Anyway I thought to change all my CNC pcs for PIs. Sheetcam has a Linux
option, as well as candle and I can use Lazarus to run my software and swap to
LibreCAD. 

All looks good so far. I got a new pi with 8GB, installed the raspberry pi
64bit os, booted from a 480GB SSD and I am super impressed with the system.
The SSD make a huge difference. My thinking was to load all the goodies on and
then copy the SD cards for each machine.  

Now the problems start. 

Sheecam is only for a specific Linux version and Candle for a 32bit os only at
this point so neither work.  (Silly me I thought all Linux software could run
run on any board.)

So I start again. I'm looking for a fan less board that can run an upgraded
Linux OS or Win7 that can run 2 screens and if it has a serial port even
better. Has to run OpenGL2 or above. 

Part of the email is just writing it all down to clear my head. 

Any suggestions ? 

Thanks Wallace. 



From markaren1 at xtra.co.nz  Tue Dec 28 04:12:42 2021
From: markaren1 at xtra.co.nz (Mark Atherton)
Date: Tue, 28 Dec 2021 17:12:42 +1300
Subject: [chbot] What board and OS to use.
In-Reply-To: <558196848660337690@marshland.co.nz>
References: <mailman.3.1640174401.1350.chchrobotics@lists.ourshack.com>
 <558196848660337690@marshland.co.nz>
Message-ID: <0f52dec5-a422-e819-c6b6-88aee03ed25d@xtra.co.nz>

First guess would be to look at some of the decent, fan-less industrial 
x86 PCs out there. I am sure that several members of the group have 
recommendations.

-mark


On 28/12/2021 4:38 PM, Marshland Engineering wrote:
> I'm getting more into CNC stuff and need to have a PC at each machine to
> download the G-Code files. Its nice to be able to view the files and maybe do
> some editing at the machine so I need a PC type machine.
> 
> I use 4 main programs Turbocad, Sheetcam, Candle and my own propitiatory stuff
> written in Delphi.
> 
> In the workshop, fan less is a real boon as there is cutting fluids, dust etc
> which buildup over time. Small laptops are not ideal but its what I'm using
> now.
> 
> Now I have a few PIs around the place doing some jobs which work well. SQL
> server, Backup drive and TV control.
> 
> Anyway I thought to change all my CNC pcs for PIs. Sheetcam has a Linux
> option, as well as candle and I can use Lazarus to run my software and swap to
> LibreCAD.
> 
> All looks good so far. I got a new pi with 8GB, installed the raspberry pi
> 64bit os, booted from a 480GB SSD and I am super impressed with the system.
> The SSD make a huge difference. My thinking was to load all the goodies on and
> then copy the SD cards for each machine.
> 
> Now the problems start.
> 
> Sheecam is only for a specific Linux version and Candle for a 32bit os only at
> this point so neither work.  (Silly me I thought all Linux software could run
> run on any board.)
> 
> So I start again. I'm looking for a fan less board that can run an upgraded
> Linux OS or Win7 that can run 2 screens and if it has a serial port even
> better. Has to run OpenGL2 or above.
> 
> Part of the email is just writing it all down to clear my head.
> 
> Any suggestions ?
> 
> Thanks Wallace.
> 
> 
> _______________________________________________
> Chchrobotics mailing list Chchrobotics at lists.ourshack.com
> https://lists.ourshack.com/mailman/listinfo/chchrobotics
> Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> Meetings usually 3rd Monday each month. See http://kiwibots.org for venue, directions and dates.
> When replying, please edit your Subject line to reflect new subjects.
> 



From helmut.walle at gmail.com  Tue Dec 28 05:29:59 2021
From: helmut.walle at gmail.com (Helmut Walle)
Date: Tue, 28 Dec 2021 18:29:59 +1300
Subject: [chbot] What board and OS to use.
In-Reply-To: <0f52dec5-a422-e819-c6b6-88aee03ed25d@xtra.co.nz>
References: <mailman.3.1640174401.1350.chchrobotics@lists.ourshack.com>
 <558196848660337690@marshland.co.nz>
 <0f52dec5-a422-e819-c6b6-88aee03ed25d@xtra.co.nz>
Message-ID: <c6064143-5cf3-1be7-8544-b648ae326372@gmail.com>

Alternatively, is going thin client (Pis should do fine as terminals and for handling comms from
/ to CNC machinery to server) and networking the whole shop an option? Then run all data and
apps on a central server? That might be a bit more hassle to set up, but would possibly save you
same hassle maintaining systems downstream. For networking, take care to run network cables on
their own route or trunking, as far away from power supply lines as possible.

Kind regards,

Helmut.

On 28/12/2021 17:12, Mark Atherton wrote:
> First guess would be to look at some of the decent, fan-less industrial x86 PCs out there. I am
> sure that several members of the group have recommendations.
> 
> -mark
> 
> 
> On 28/12/2021 4:38 PM, Marshland Engineering wrote:
>> I'm getting more into CNC stuff and need to have a PC at each machine to
>> download the G-Code files. Its nice to be able to view the files and maybe do
>> some editing at the machine so I need a PC type machine.
>>
>> I use 4 main programs Turbocad, Sheetcam, Candle and my own propitiatory stuff
>> written in Delphi.
>>
>> In the workshop, fan less is a real boon as there is cutting fluids, dust etc
>> which buildup over time. Small laptops are not ideal but its what I'm using
>> now.
>>
>> Now I have a few PIs around the place doing some jobs which work well. SQL
>> server, Backup drive and TV control.
>>
>> Anyway I thought to change all my CNC pcs for PIs. Sheetcam has a Linux
>> option, as well as candle and I can use Lazarus to run my software and swap to
>> LibreCAD.
>>
>> All looks good so far. I got a new pi with 8GB, installed the raspberry pi
>> 64bit os, booted from a 480GB SSD and I am super impressed with the system.
>> The SSD make a huge difference. My thinking was to load all the goodies on and
>> then copy the SD cards for each machine.
>>
>> Now the problems start.
>>
>> Sheecam is only for a specific Linux version and Candle for a 32bit os only at
>> this point so neither work.  (Silly me I thought all Linux software could run
>> run on any board.)
>>
>> So I start again. I'm looking for a fan less board that can run an upgraded
>> Linux OS or Win7 that can run 2 screens and if it has a serial port even
>> better. Has to run OpenGL2 or above.
>>
>> Part of the email is just writing it all down to clear my head.
>>
>> Any suggestions ?
>>
>> Thanks Wallace.
>>
>>
>> _______________________________________________
>> Chchrobotics mailing list Chchrobotics at lists.ourshack.com
>> https://lists.ourshack.com/mailman/listinfo/chchrobotics
>> Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
>> Meetings usually 3rd Monday each month. See http://kiwibots.org for venue, directions and dates.
>> When replying, please edit your Subject line to reflect new subjects.
>>
> 
> 
> _______________________________________________
> Chchrobotics mailing list Chchrobotics at lists.ourshack.com
> https://lists.ourshack.com/mailman/listinfo/chchrobotics
> Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> Meetings usually 3rd Monday each month. See http://kiwibots.org for venue, directions and dates.
> When replying, please edit your Subject line to reflect new subjects.


From list57 at top.geek.nz  Tue Dec 28 17:56:27 2021
From: list57 at top.geek.nz (Volker Kuhlmann)
Date: Wed, 29 Dec 2021 06:56:27 +1300
Subject: [chbot] What board and OS to use.
In-Reply-To: <c6064143-5cf3-1be7-8544-b648ae326372@gmail.com>
References: <mailman.3.1640174401.1350.chchrobotics@lists.ourshack.com>
 <558196848660337690@marshland.co.nz>
 <0f52dec5-a422-e819-c6b6-88aee03ed25d@xtra.co.nz>
 <c6064143-5cf3-1be7-8544-b648ae326372@gmail.com>
Message-ID: <20211228175627.GA4562@top.geek.nz>

> same hassle maintaining systems downstream. For networking, take care to run network cables on
> their own route or trunking, as far away from power supply lines as possible.

Or run shielded cable through the shop, if it's a high-EMI environment.

Are there grounding issues with connecting multiple PCs (or RPis) with
cables to the same switch, with the computers also connected to the
machines with cables? 
Are there galvanically isolated USB/serial adapters?

Volker

-- 
Volker Kuhlmann
http://volker.top.geek.nz/	Please do not CC list postings to me.


From marshland at marshland.co.nz  Wed Dec 29 07:32:47 2021
From: marshland at marshland.co.nz (Marshland Engineering)
Date: Wed, 29 Dec 2021 20:32:47 +1300
Subject: [chbot] What board and OS to use
Message-ID: <507319639651284070@marshland.co.nz>

As much as I want to go to Linux, it is just not an option.

I'm looking for 4 + pc and an option to add in the future. All same os and
programs. 

These look quite good. 

US$170 

https://www.aliexpress.com/item/1005001515053632.html

Now has anyone had any experience with Win7 Lite or similar ? Win 10 if I
desperate. 

There is a program called NTLite that can trim down the os but it would be
better if some one had some experience with it as I'm in the dark here.

https://www.ntlite.com/

Cheers Wallace



From markaren1 at xtra.co.nz  Wed Dec 29 08:49:09 2021
From: markaren1 at xtra.co.nz (Mark Atherton)
Date: Wed, 29 Dec 2021 21:49:09 +1300
Subject: [chbot] What board and OS to use
In-Reply-To: <507319639651284070@marshland.co.nz>
References: <507319639651284070@marshland.co.nz>
Message-ID: <58b448cd-aec6-d0d4-72c2-b4c112227512@xtra.co.nz>

Hi Wallace,

https://www.amazon.com/product-reviews/B08796NB62

Several reviews seem positive; main criticism seems to be speed, but 
since you are building a collection of independent G-code (or the like) 
processors your choice seems reasonable (much as I hate the Celeron).

Trimmed down Win7 also makes sense to me. I have a (commercially) 
trimmed down copy of XP around here; it occupies 98MB of RAM, and runs 
quite well for moderate tasks, even on a converted thin client.

If you need keyboard and mouse per station, have you considered using 
older laptops ?

If not, then possibly orchestrate your collection of headless machines 
via RDP from a central machine with keyboard and mouse over WiFi - RDP 
isn't likely to be very burdensome for your application, and main 
payload is G code. I would have thought you would only be using RDP for 
progress and status monitoring once a job has been launched.

Anyway, keen on your approach and please keep us updated on progress.

Regards,

Mark










On 29/12/2021 8:32 PM, Marshland Engineering wrote:
> As much as I want to go to Linux, it is just not an option.
> 
> I'm looking for 4 + pc and an option to add in the future. All same os and
> programs.
> 
> These look quite good.
> 
> US$170
> 
> https://www.aliexpress.com/item/1005001515053632.html
> 
> Now has anyone had any experience with Win7 Lite or similar ? Win 10 if I
> desperate.
> 
> There is a program called NTLite that can trim down the os but it would be
> better if some one had some experience with it as I'm in the dark here.
> 
> https://www.ntlite.com/
> 
> Cheers Wallace
> 
> 
> _______________________________________________
> Chchrobotics mailing list Chchrobotics at lists.ourshack.com
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From erringtona at gmail.com  Wed Dec 29 10:29:27 2021
From: erringtona at gmail.com (Andrew Errington)
Date: Wed, 29 Dec 2021 23:29:27 +1300
Subject: [chbot] What board and OS to use.
In-Reply-To: <558196848660337690@marshland.co.nz>
References: <mailman.3.1640174401.1350.chchrobotics@lists.ourshack.com>
 <558196848660337690@marshland.co.nz>
Message-ID: <CAGZkoWRxebnZHReNAGpYjeMMgEpv4tf0Sm57gLZ0141HX5uyPQ@mail.gmail.com>

Just a couple of observations.

LibreCAD is a dead duck. All the cool kids use FreeCAD. I don't actually
like it though, and I use QCAD for 2D stuff, and OpenSCAD for 3D stuff.
OpenSCAD is great for modelling complete assemblies then projecting
outlines onto a plane to make 2D DXF files for use elsewhere. I've also had
success with Python programmatically constructing DXF files from parametric
inputs.

For G-code sending and local CAM take a look at bCNC. It's lightweight, and
runs easily on a Pi.

In terms of hardware, the Pi 400 (the one with integrated keyboard) is a
very capable machine. The keyboard houses a large heatsink, so fans are not
required. Just hook up a mouse and monitor.

You'll probably want a file server, which could also be a Pi. In fact, it's
Pis all the way down.

Andrew

On Tue, 28 Dec 2021, 16:39 Marshland Engineering, <marshland at marshland.co.nz>
wrote:

> I'm getting more into CNC stuff and need to have a PC at each machine to
> download the G-Code files. Its nice to be able to view the files and maybe
> do
> some editing at the machine so I need a PC type machine.
>
> I use 4 main programs Turbocad, Sheetcam, Candle and my own propitiatory
> stuff
> written in Delphi.
>
> In the workshop, fan less is a real boon as there is cutting fluids, dust
> etc
> which buildup over time. Small laptops are not ideal but its what I'm using
> now.
>
> Now I have a few PIs around the place doing some jobs which work well. SQL
> server, Backup drive and TV control.
>
> Anyway I thought to change all my CNC pcs for PIs. Sheetcam has a Linux
> option, as well as candle and I can use Lazarus to run my software and
> swap to
> LibreCAD.
>
> All looks good so far. I got a new pi with 8GB, installed the raspberry pi
> 64bit os, booted from a 480GB SSD and I am super impressed with the system.
> The SSD make a huge difference. My thinking was to load all the goodies on
> and
> then copy the SD cards for each machine.
>
> Now the problems start.
>
> Sheecam is only for a specific Linux version and Candle for a 32bit os
> only at
> this point so neither work.  (Silly me I thought all Linux software could
> run
> run on any board.)
>
> So I start again. I'm looking for a fan less board that can run an upgraded
> Linux OS or Win7 that can run 2 screens and if it has a serial port even
> better. Has to run OpenGL2 or above.
>
> Part of the email is just writing it all down to clear my head.
>
> Any suggestions ?
>
> Thanks Wallace.
>
>
> _______________________________________________
> Chchrobotics mailing list Chchrobotics at lists.ourshack.com
> https://lists.ourshack.com/mailman/listinfo/chchrobotics
> Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> Meetings usually 3rd Monday each month. See http://kiwibots.org for
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> When replying, please edit your Subject line to reflect new subjects.
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From markaren1 at xtra.co.nz  Fri Dec 31 19:32:46 2021
From: markaren1 at xtra.co.nz (Mark Atherton)
Date: Sat, 1 Jan 2022 08:32:46 +1300
Subject: [chbot] Junk, the way it should be
Message-ID: <eccd8679-de0a-024b-0761-f2fe73397a70@xtra.co.nz>

Just found an interesting reference: "Norton Surplus (Southern 
California) appear to have a Lunar Module decent engine available for sale".

Norton's aerospace page has other interesting things 
http://www.nortonsalesinc.com/aerospace.html

So maybe it's time to start planning that trip, and sorting out how to 
get the container loaded and shipped back to NZ !

HNY,

Mark


From cdhmanning at gmail.com  Fri Dec 31 19:56:16 2021
From: cdhmanning at gmail.com (Charles Manning)
Date: Sat, 1 Jan 2022 08:56:16 +1300
Subject: [chbot] What board and OS to use
In-Reply-To: <58b448cd-aec6-d0d4-72c2-b4c112227512@xtra.co.nz>
References: <507319639651284070@marshland.co.nz>
 <58b448cd-aec6-d0d4-72c2-b4c112227512@xtra.co.nz>
Message-ID: <CAE21AQrsHYGNticPi_cUCOaSGBUMDEEnqAEAXF1MEi1wgpJWsg@mail.gmail.com>

Why is Linux not an option? I'd rather find a way to work around that
restriction.

Firing up XP on a new box would be illegal as it would be in violation of
the licensing agreements. You cannot buy new XP licenses.


On Wed, Dec 29, 2021 at 9:49 PM Mark Atherton <markaren1 at xtra.co.nz> wrote:

> Hi Wallace,
>
> https://www.amazon.com/product-reviews/B08796NB62
>
> Several reviews seem positive; main criticism seems to be speed, but
> since you are building a collection of independent G-code (or the like)
> processors your choice seems reasonable (much as I hate the Celeron).
>
> Trimmed down Win7 also makes sense to me. I have a (commercially)
> trimmed down copy of XP around here; it occupies 98MB of RAM, and runs
> quite well for moderate tasks, even on a converted thin client.
>
> If you need keyboard and mouse per station, have you considered using
> older laptops ?
>
> If not, then possibly orchestrate your collection of headless machines
> via RDP from a central machine with keyboard and mouse over WiFi - RDP
> isn't likely to be very burdensome for your application, and main
> payload is G code. I would have thought you would only be using RDP for
> progress and status monitoring once a job has been launched.
>
> Anyway, keen on your approach and please keep us updated on progress.
>
> Regards,
>
> Mark
>
>
>
>
>
>
>
>
>
>
> On 29/12/2021 8:32 PM, Marshland Engineering wrote:
> > As much as I want to go to Linux, it is just not an option.
> >
> > I'm looking for 4 + pc and an option to add in the future. All same os
> and
> > programs.
> >
> > These look quite good.
> >
> > US$170
> >
> > https://www.aliexpress.com/item/1005001515053632.html
> >
> > Now has anyone had any experience with Win7 Lite or similar ? Win 10 if I
> > desperate.
> >
> > There is a program called NTLite that can trim down the os but it would
> be
> > better if some one had some experience with it as I'm in the dark here.
> >
> > https://www.ntlite.com/
> >
> > Cheers Wallace
> >
> >
> > _______________________________________________
> > Chchrobotics mailing list Chchrobotics at lists.ourshack.com
> > https://lists.ourshack.com/mailman/listinfo/chchrobotics
> > Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> > Meetings usually 3rd Monday each month. See http://kiwibots.org for
> venue, directions and dates.
> > When replying, please edit your Subject line to reflect new subjects.
> >
>
>
> _______________________________________________
> Chchrobotics mailing list Chchrobotics at lists.ourshack.com
> https://lists.ourshack.com/mailman/listinfo/chchrobotics
> Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
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> venue, directions and dates.
> When replying, please edit your Subject line to reflect new subjects.
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