[chbot] Servo controller

[Andrew Errington]

Hi Ant,

Your best bet would be to join the list and ask. We're a friendly bunch,
and you don't need to have met in person before asking interesting
questions on the list. Having said that, our next meeting is just over a
week away. You're welcome to come along and say hi.

Mark: Ant sent this to the moderator address, so it's only visible to us,
not to the membership at large.

Andrew

On Sat, Jul 11, 2020, 08:33 Mark Atherton <markaren1 at xtra.co.nz> wrote:

> Ahh, I understand.
>
> So, does anyone here have a spare that Ant might be able to borrow ?
>
> -Mark
>
> On 11/07/2020 8:27 AM, Ant Williams wrote:
>
> You are quite correct. That controller card will do what i want. 🙂.
>
> But it is weeks away and I am wanting to try my gadget out. So I'm seeing
> if your group might have something similar at hand.
>
> On Sat, 11 Jul 2020, 08:23 Mark Atherton, <markaren1 at xtra.co.nz> wrote:
>
>> If I understand correctly, it looks like you have bought a complete H
>> bridge servo amplifier, and it may already do what you want.
>>
>> The unit appears to use a feedback pot to sense position of the motor.
>>
>> The unit appears to be able to accept 0-5V or 1-2ms PWM (model servo)
>> control input depending on settings of the blue and pink movable jumper.
>>
>> Neat product.
>>
>> ... well at least that is my interpretation of what the product does, I
>> may be completely wrong :)
>>
>> Let me know if that was of use, or if I have missed the point.
>>
>> Regards, Mark
>>
>>
>>
>> On 11/07/2020 7:47 AM, arrkwill wrote:
>>
>> Thanks for your quick response Mark.
>>
>> I have ordered one of these from AliExpress but it is taking ages to get
>> here. 🙃
>> https://www.newbecca.com/product/35167306166
>>
>> I have a 60w 12vdc motor that moves a device and the position of the
>> device is monitored by a pot giving 0-5vdc back. I need to be able to
>> control the position by setting another pot somewhere in the range of 0-5v.
>>
>> So the motor needs to be driven forward/reverse to match output to input.
>> I need the control to include a PID just as most servo systems do.
>>
>> Does this help?
>> Ant
>>
>>
>>
>> Sent from my Samsung Galaxy smartphone.
>>
>>
>> -------- Original message --------
>> From: Mark Atherton <markaren1 at xtra.co.nz> <markaren1 at xtra.co.nz>
>> Date: 11/07/20 07:17 (GMT+12:00)
>> To: Ant Williams <arrkwill at gmail.com> <arrkwill at gmail.com>,
>> chchrobotics-owner at lists.ourshack.com
>> Subject: Re: Servo controller
>>
>> Hi Ant,
>>
>> Can you tell us more about your requirement please.
>>
>> So the servo amplifier runs off of a 12V supply, and is capable of
>> delivering up to 10A max output current.
>>
>> The input control signal is analogue/linear 0 to 5V.
>>
>>
>> What output configuration are you looking for ?
>>
>> a - Single ended (0V in = 0V out, 5V in = 12V out)
>>
>> b - H bridge as above, but second output with inverted sense of 12V
>> output.
>>
>> c - Other - more details please
>>
>>
>> It would also be useful to know a bit more about your application, if
>> possible.
>>
>> Regards,
>>
>> Mark
>>
>>
>>
>>
>> On 11/07/2020 7:02 AM, Ant Williams wrote:
>> > Hi there. I'm actually just seeking advice, not wishing to join.
>> > Perhaps you can assist?
>> >
>> > I'm looking for a 12vdc 10A servo controller which takes 0-5vdc as its
>> > control signal (not PWM) for an experiment I'm trying.
>> >
>> > Any advice?
>> >
>> > Regards
>> > Ant Williams
>>
>>
>>
>>
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