Electronics Forum | Tue Jul 26 04:34:59 EDT 2005 | aj
Guys, I have very little experience in quoting for new jobs on an automated assembly line . Can anyone give me some pointers? I know this is a broad subject and depends on overheads etc. but any assistance would be appreciated aj
Electronics Forum | Sun Jul 31 18:32:30 EDT 2005 | crishan
Thanks you for the information LUPO, specially with component minimum clearance. I will also check the XY table for movement accuracy. What specific parameters do you check with your SPC charts. Thanks Crishan
Electronics Forum | Mon Aug 08 13:05:53 EDT 2005 | LUPO
Hi, So about SPC by variable: flux drop-jet size, preheating, high of solder flow. attributes: soldering defects. I hope that the info will be helpful.
Electronics Forum | Thu Jul 28 08:12:38 EDT 2005 | jh0n!
That's pretty much what I figured - just wanted some external verification if possible. And don't so much as BREATHE that around here. I'm just waiting for engineering's *next* bright idea. ;)
Electronics Forum | Thu Jul 28 11:14:48 EDT 2005 | jh0n!
On chips, none - 1:1. Those are 1206 chips, either .010 or .015" between them. I've never seen one bridge. Some *rare* billboarding. That's it. *shrug* These QFNs, tho....
Electronics Forum | Wed Jul 27 22:09:49 EDT 2005 | Ken
My policy is not to mix them. You have zero cross contamination potiental with this policy.
Electronics Forum | Wed Jul 27 17:53:25 EDT 2005 | GS
Is your Moisture Sensitive Device handling process correct ? Some time internal delaminations beave like the pbm you have. Regards... GS
Electronics Forum | Fri Jul 29 06:45:27 EDT 2005 | davef
See: * The supplier guy says, "The assembler blanked the pooch." * The assembler guy says, "The supplier blanked the pooch." Cut the scomponent is half, do a failure analysis, and determine who is correct.
Electronics Forum | Thu Jul 28 08:02:09 EDT 2005 | stepheniii
Check the pick postion in the feeder. If the nozzle is picking at the edge of the component, it could flip it. BTW what kind of machine are you using? Stephen Olan
Electronics Forum | Thu Jul 28 08:02:39 EDT 2005 | bobpan
When we see the upside down part problem its typically feeder related....either the feeder is making the part jump or the z is taught tooooooo deep causing the part to jump before its in its pick location. chow
