Electronics Forum | Wed Dec 31 08:55:09 EST 1997 | justin medernach
| Has anyone had any experience with thermal shocking | and cracking of SMD capacitors during the rework process? | My company was advised to preheat capacitors to 125 C | at a rate of 2 C/sec before replacing them onto boards. | Would this maybe
Electronics Forum | Tue Oct 09 11:50:44 EDT 2001 | Marc Peo
Hello Darby! Mike is correct in saying that reversing the conveyor can be done but the position of the cooling zone would be troublesome. I am guessing that you are looking at a left to right machine that you would like to run right to left or vice
Electronics Forum | Tue Mar 19 11:56:03 EST 2002 | davef
Hany: How could you let this happen? ;-) The real issue is how best to remove the VSOP. You can argue if there is one clearly superior method. Consider trying several methods and let your operators select the one that makes sense to them. Replac
Electronics Forum | Thu Mar 28 03:19:54 EST 2002 | Opor
Hi All Does anybody have done the profiling board life time experiment? What is the proper life time of FR4 profiling board? How can we know when the profile board or thermocouple should be change?How to use dummy board instead of using gold/real
Electronics Forum | Fri Sep 20 19:06:09 EDT 2002 | mjabure
The way it works is the first index is done with the feed cylinder, and the final is done using the cam during pick. You might want to check to make sure you're getting a full, complete stroke out of your feed cylinder, also make sure the mechanism
Electronics Forum | Fri Oct 03 08:42:36 EDT 2003 | m4040
This is probably the most advanced machine that MPM has EVER offered. It operates in a Windows 2000 environment, which means plug and play networking. Both setup for new boards and 2D are VERY easy to set up. Most new board programming can be done of
Electronics Forum | Fri Oct 17 14:33:05 EDT 2003 | AXL
Wait a minute I thought I said Celestica and a few others have done the Engineering evaluations on a list of 10 top solder paste's and Indium SMQ92J and Kester's R560&562 came out on top. First you say 'don't trust all of the so called experts on thi
Electronics Forum | Sun Nov 30 08:53:15 EST 2003 | davef
IPC-6012A finds "circuit repairs" as acceptable in Class 1, 2, and 3 only "As agreed by user and supplier." So, it is your call, basically. Generally these repairs, if done properly, are reliable. See IPC-7721, 5.2.3, for conductor repair by welding
Electronics Forum | Thu Feb 12 16:25:18 EST 2004 | joe
For those of you that do not know it, our little Republic here is based on Capitalism. Corporations have a right to make a profit. Moreover, a corporation has a responsibility to internal and external stakeholders. Employees are internal and sharehol
Electronics Forum | Wed Aug 25 13:10:13 EDT 2004 | gregp
Stefan, The scenario you describe is the way it is done on our 3 series placement machines. The C5 series is a databased arrangement. Each reel (tube and tray) that comes in the door gets a unique ID (and a barcode label). This is done with the C5
