Electronics Forum | Thu Jan 07 10:41:04 EST 1999 | Dave F
| We are struggling with an effective way to control our SMT processes. I'm curious as to what parameters other companies monitor in their processes and how to control the quality coming off the end of the SMT line. We are currently restricted to a
Electronics Forum | Thu Aug 23 15:38:58 EDT 2001 | mparker
Bingo - the mylar is the problem. Ask the fab vendor what storage and humidity controls they use on the photo tools. The films can changed geometry from day to day depending on the ambient environment. What controls are used during production? The ra
Electronics Forum | Wed Mar 20 19:53:11 EST 2002 | davef
Your customer's question is reasonable. Before you can establish your control limits, you need to take 25 to 30 data samples of 4 to 5 measurements. This says you need a 100 or more measurements before you can start charting. And even this much
Electronics Forum | Fri Mar 21 11:10:24 EST 2003 | davef
There is no standard. If your boards solder well, they're good. Well soldered boards that have been stored a long time will have field life similar to well soldered boards that have not been stored a long time. The solderability of boards depends
Electronics Forum | Wed Sep 03 18:20:00 EDT 2003 | davef
Major advance: Productionization of SMT. Minor advances: * Realization and control of solder paste characteristics * Vision alignment controls in printers. * Evolution from mechanical centering [through laser alignment controls] to vision alignment
Electronics Forum | Tue Mar 07 07:56:54 EST 2006 | amol_kane
Hi, I have a PVA conformal coating machine. Does anyone out there have a method to control the process once it is in the automated mode? my problem is that eventually the coating gets into the keep out areas a little bit and causes issues. is anyone
Electronics Forum | Wed Sep 20 17:20:46 EDT 2006 | Stano
I have problem with Panasert MV2VB. After activation machine start up Windows NT normally, well near end initialization displayed message: MMI initial check - Symbol 1 - 0 error. After initialization finish and Power On machine is dispalyed Self diag
Electronics Forum | Wed Sep 20 17:24:35 EDT 2006 | Stano
I have problem with Panasert MV2VB. After activation machine start up Windows NT normally, well near end initialization displayed message: MMI initial check - Symbol 1 - 0 error. After initialization finish and Power On machine is dispalyed Self diag
Electronics Forum | Mon Jan 15 21:54:19 EST 2007 | raychamp007
Dear Friend, Our SMT Production & component ware house RH currently control limit set to 40%RH - 60%RH, but not always achievable, the RH reading measurement are between 38%RH -65%RH. J-STD-001D recommend 30%RH - 70%RH. However it is only a recommen
