Electronics Forum | Wed Oct 26 09:50:27 EDT 2016 | schmidtv62
I'm looking for any information on the Samsung SM421 regarding BGA placement. We currently have a Universal GSM (circa 2004) GI-14 and we are approaching software limitations on multi-pitch BGAs. Any additional information about the SM421 capabilit
Electronics Forum | Wed Dec 14 16:27:02 EST 2016 | warwolf
No sorry, I havnt seen anything like that. What is the package size/ball size/ or the ball pitch? I can have a look and see if I can get it to work on these machines? I'm pretty sure they will cope fine though.
Electronics Forum | Wed Aug 09 12:34:54 EDT 2017 | jdengler
It also varies with the types of deposits. Small deposits of paste (as seen on fine pitch parts or small chips) seem to be more affected by exposure. Jerry
Electronics Forum | Thu Sep 07 10:18:24 EDT 2017 | capse
Chrys Shea has published extensively on stencil materials, coatings and paste release mechanisms. Many of the papers are available to download on her website. Just search for Shea Engineering Services. I've worked with Chrys in the past, she is defin
Electronics Forum | Mon Jun 24 22:15:56 EDT 2019 | sssamw
Can you please tell us which components cracked? Component type, size, pitch, pin Qty, etc. The solder cracked in thermal cycling is very complicated and difficult to solve.
Electronics Forum | Mon Aug 13 09:20:46 EDT 2018 | sara_pcb
What is the difference between jet printing & jet dispensing. Our's is small prototyping, high reliability PCB assembly business. The SMT components used are up to 0.4 mm pitch BGA & 0201 size chips. Which is more suitable for us?
Electronics Forum | Thu Aug 30 13:06:10 EDT 2018 | emeto
I don't know your board, but for this specific part: 10mil round aperture on a 3.5mil stencil with type 4 paste wold be ideal
Electronics Forum | Sun Jan 13 21:55:15 EST 2019 | sarason
Send me some example files and I should be able to answer your question, by running some of my special tools over your files. sarason
Electronics Forum | Fri Feb 01 18:23:30 EST 2019 | slthomas
Is it indexing at the correct pitch when you push the forward button? I really can't remember much about those machines but it seems like that's an indication that it's not programmed correctly. I'll be bobpan knows, regardless. ;)
Electronics Forum | Sat Feb 02 04:48:30 EST 2019 | dfl
yes it's moving at the wrong pitch, about 3 components a time. Is the programming you talking about at the microcontroller AT85C55 or that serial memory 24C04? Or there is some procedure on the Quad to adjust this?
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