[chbot] BGA reballing etc.

[Mark Beckett]

Yani
Someminor miscommunication ended up with you 'borrowing' it.

Since it works, you might want order one.
I got mine from
http://digistump.com/category/18

Erik is very good.


Cheers
Mark

Yani Dubin wrote:
> Hi,
>
> Mark B - I meant to tell you that Mark A gave me your Pieco paste 
> press at the meeting last month. I just got my flux last week, and 
> finally had a tidy enough table to give it a go tonight. It has been 
> more than 5 years years since I was an HW engineer and last used a 
> flux/paste gun - but this did seem good from my first go. Yes, I had 
> issues with it not stopping the flow immediately after backing off the 
> lever, but this is solvable by ratcheting back the rod (much as I had 
> to do when using a paste gun). Thanks for the lend :) (hope that was 
> okay!)
>
> Mark A - no photos yet because I am just practicing (and practicing on 
> Tait IP at that). I've collected some old dead portable radios with 
> enough life in them to beep and/or flash when powered up - so perfect 
> as a yes/no indicator as to whether I've got the hang of the process 
> (and not completely killing things). So I plan to get a bit of 
> practice removing/cleaning/reballing these FPGA BGA packages before I 
> graduate to actual laptop GPUs.
>
> I would have thought a plain and simple 16x16 0.6mm footprint wouldn't 
> be too big an ask, which is what this model of Altera FPGA uses. And I 
> see you bought it for the 16x16 0.8mm one and they didn't have that 
> either. It is amazing how many weird and wonderful stencils they 
> managed to include in that pack, and yet managed to fail to include 
> anything so straight forward (and likely also very common?). I will 
> have to try with a much larger stencil, which is 32x32 in size but 
> with a ring of blanking and a 16x16 square pattern inside. Clamping it 
> will be the issue of course. Perhaps I will get fed up and cut/file it 
> down to size :)
>
> Regards,
> Yani.
>
> On Tue, Jan 6, 2015 at 5:30 PM, Mark Atherton <markaren1 at xtra.co.nz 
> <mailto:markaren1 at xtra.co.nz>> wrote:
>
>     Hi Mark,
>
>     I plan to return it at the next meeting -- neat unit.
>
>     Yet another reason for Yani to turn up :)
>
>     HNY
>
>     -mark
>
>     At 04:49 p.m. 6/01/2015, m.beckett at amuri.net
>     <mailto:m.beckett at amuri.net> wrote:
>
>         Mark
>         Have you had a chance to try the Pico Paste tool I lent you.
>         Could something along those lines be the answer for fiddly
>         application.??
>         Cheers
>         Mark
>
>         On Tue, 06 Jan 2015 16:34:12 +1300, Mark Atherton wrote:
>
>             yup, NP
>             At 01:27 p.m. 6/01/2015, you wrote:
>
>                 Hi Mark, On Tue, Jan 6, 2015 at 6:13 AM, Mark Atherton
>                 <markaren1 at xtra.co.nz
>                 <mailto:markaren1 at xtra.co.nz>><mailto:markaren1 at xtra.co.nz
>                 <mailto:markaren1 at xtra.co.nz>>markaren1 at xtra.co.nz
>                 <mailto:markaren1 at xtra.co.nz>> wrote: I bought the
>                 stencils + jig out of curiosity, in the hope that it
>                 might include a 16 x 16 x 0.8mm pattern (which it
>                 appears not to have). So, solder balls are missing,
>                 but have plenty of spare flux. You are more than
>                 welcome to the whole lot, but please take some photos
>                 of your experiences. Okay, great. Yes, I will take you
>                 up on that offer - and yes, happy to document my
>                 trials and tribulations. I will try to be at the next
>                 meeting if you want to bring it in then. I just put in
>                 an order for 10x bottles of various sized solder balls
>                 (12.5k in each bottle) for $13.50. Free shipping, so
>                 should be here in a month or so. I'm, not all that
>                 great with fiddly stuff, so could go either way
>                 really. Cheers, Yani.
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