Electronics Forum | Wed Jan 30 09:10:48 EST 2002 | bob_smith
Hi Dave, Sorry about that. Specifically, I am referring to radial leads on a crystal. The leads are supposed to be gold plated but only 1/2 to 2/3 of the lead is plated. We bend the lead to form a foot which is soldered to a pad on the PCB. Normally
Electronics Forum | Wed Jan 30 17:47:22 EST 2002 | davef
Oooo, pix, coo!!! Yes, that solder connection has been beat-up. It is very �old�. So, your customer is seeing failures, correct? I can believe it. I want to say the solder in your connections doesn�t stand a chance, but lack experience in this a
Electronics Forum | Wed Jan 30 12:22:06 EST 2002 | jax
Clark, The universal GDM should handle your application with ease. Although not as accurate as an archimedes screw, the positive displacement pump of your GDM will still be well within any tolerances if maintained and operated properly.. Not to me
Electronics Forum | Thu Jan 31 11:49:21 EST 2002 | MikeF
Does anyone out there have a wave solder troubleshooting chart in electronic form they could e-mail me? I'm about to crank up a wave solder machine here, and the chart I got several jobs ago is missing in action. Also, if anyone remembers using a
Electronics Forum | Wed Feb 06 10:58:21 EST 2002 | MikeF
My thanks to everyone that sent me a troubleshooting chart. I now have 3 different ones in electronic format that I've put into a Winzip archive. Anyone that would like me to send them a copy, please e-mail me at mflori@custom-mfg-eng.com and I wi
Electronics Forum | Tue Apr 23 14:39:49 EDT 2002 | mkallen
Here's a related question: How hot can a PBGA get before popcorn delamination becomes a concern? 100 C? 150C? I realize that the answer will depend upon the conditioning of the part, so let's assume that the part is saturated with moisture. A pra
Electronics Forum | Tue Apr 23 18:34:45 EDT 2002 | mkallen
My first posting was not very clear -- sorry. Let me try again. What I want to know is: can I eliminate the drying (baking) process completely IF I know that the good parts (i.e., those not being reworked) are going to stay under some threshold tem
Electronics Forum | Sat Feb 02 09:48:27 EST 2002 | davef
We've talked about assembling on flex previously. Search the fine SMTnet Archives for background. Issues that come to mind [which is very risky, given that this Saturday morning and last night was at Jimbo's] are: * Use carriers that can flow thoug
Electronics Forum | Sat Feb 02 08:55:55 EST 2002 | davef
I'd don't believe that the reels need to be ESD protective material. The carrier and cover tape have resistivity and materials specifications. Start with EIA-481. In past threads on SMTnet, we have discussed problems in picking components that wer
Electronics Forum | Sun Feb 03 08:12:38 EST 2002 | davef
I&J Fisnar [2-07 Banta Pl Fair Lawn, NJ 07410-3002 201-796-1477 Fax 201-794-7034 http://www.ijfisnar.com info@ijfisnar.com ] makes a very good quality bench-top liquid dispenser. A base machine costs about $10k. Programming is relatively easy, alth