Electronics Forum | Thu Apr 15 20:41:22 EDT 2004 | Ken
There are ledgitimate reasons for checking furnace calibrations, but let me clarify what that is. 1. TC's are not necessarily calibrted. Not unless you need "absolute" accuracy. TC's operate against a (non-linear) standard +/- a tolerance. Most
Electronics Forum | Wed Jul 04 12:22:07 EDT 2001 | davef
Several points: * Consider that your Cpk is probably different for both placing large and small components. * Probably your routine placement rate SB the speed you use to monitor the accuracy of your process. * Some people use a calibrated glass test
Electronics Forum | Mon Oct 23 15:42:46 EDT 2000 | Jeff
Bach, I was previously an SMT Supervisor with 5 years battling this issue. The following formula has worked well for me after I figured it out - whoich took a long process of trying out new approaches. 1. Production Supervisors must believe they c
Electronics Forum | Tue Nov 27 20:19:12 EST 2007 | davef
Q1: How many mils the gap between the terminal and pad? A1: It depends on properties of the glue and z-force when the component is placed by the assembler. Q2: Your practice is for technology SMT-4? A2: We don't understand SMT4. We know that very sm
Electronics Forum | Tue Nov 27 20:05:31 EST 2007 | shy
Dback, Current method is by using dispenser machine to dispense the glue at PCB. This non-wetting is randomly and not repeating to the same location. My adhesive height is 0.01" to 0.035". Is this will cause the component to had a gap between the t
Electronics Forum | Tue Nov 27 20:48:31 EST 2007 | davef
Shy: You say, "I've already done some evaluation to reduce the heigh of the glue but it fails at wave solder which cause the component to be drop/missing." Based on your evaluation, questions are: * What is the relation between component standoff an
Electronics Forum | Wed Nov 28 01:28:32 EST 2007 | shy
Q1:What is the relation between component standoff and drop missing? A1:component standoff will identify either solder paste at SMT side can form the fillet at component terminal or not. Drop/missing component is totally out of the topics since i jus
Electronics Forum | Mon Nov 21 09:52:54 EST 2005 | carsten
just wanted to thank you all for your assistance... Regards, Carsten
Electronics Forum | Tue Nov 29 15:20:18 EST 2005 | SJ
Just want to thank you all for the great advice on this thread!!
Electronics Forum | Tue Nov 29 15:29:52 EST 2005 | SJ
Just want to thank you all for the great advice to this thread!!
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