Electronics Forum | Thu Oct 04 09:44:24 EDT 2007 | hussman
It realy depends on your product. Tighter tollerance boards require a better machine, which costs more money. Multi-layered baords wih a alot of heat sink will require preheat - something a lot of selective solder machine do not come standard with.
Electronics Forum | Thu Oct 11 21:31:59 EDT 2007 | petep
As a CM, how can you change the customer's base PC Board material to RoHS Compliant T-g spec's etc? Curious ...
Electronics Forum | Wed Oct 10 12:20:44 EDT 2007 | slthomas
Does it fail to function or does it function outside of acceptable tolerances? If the latter I wouldn't know what to think, but if the former I would feel obligated to suspect solder quality or maybe even a component problem with the elevated lead-
Electronics Forum | Mon Nov 05 19:43:09 EST 2007 | davef
"Effects of surface finish on high frequency signal loss using various substrate materials" - Call Don Cullen at Mac Dermid or Larry Gatewood at Rockwell Collins for a copy.
Electronics Forum | Mon Nov 05 14:26:24 EST 2007 | hussman
Maybe the "other" company runs a different wave, or flux, or pallet, or touches up every board. Assumptions are like brains - every claims they have one, but very few use em.
Electronics Forum | Tue Nov 13 20:29:03 EST 2007 | grantp
Hi, What size via's are you guys seeing, as the ones in our products are incredibly tiny, and via's are very small now days. The via's on the boards we have are dramatically smaller than the pad on an 0402. Grant
Electronics Forum | Wed Nov 07 11:09:43 EST 2007 | cyber_wolf
Ya probably most used equipment guys do skip that step on the machines they sell as "production ready" As for us, our machines need to actually build boards without going down on the errors that dirty clutches create....you silly man.
Electronics Forum | Thu Nov 08 10:02:55 EST 2007 | hussman
Yes. I used to use em on our old 286. The side clamps work very well with them and our missing parts from support pin problem went away. It was our #1 defect a few years ago. 100%ing work orders for missing parts sucks.
Electronics Forum | Fri Nov 09 15:52:47 EST 2007 | kmakiya
We have been using Grid Loks on our MPM Accuflex machines and see an offset in the print every so often. Haven't been able to isolate the problem. How bad was the misprint and how was it related to the grid loks? Thanks
Electronics Forum | Thu Nov 08 08:56:51 EST 2007 | hussman
Sorry Matt, Just hate when people use this site as their engineering bed. I believe you can weigh your board before and after reflow. It would have to be a sensitive scale though. From there you can calculate weight to volume ratios.
