Electronics Forum | Wed Sep 08 16:00:09 EDT 1999 | Mark D.
My company is looking to perform "real time" statistical process control on our current SMT operations. I have identified the critical processes for SPC but have not had much luck in finding a system(s) that can monitor the required processes for my
Electronics Forum | Tue Jun 23 22:52:49 EDT 1998 | Dan Perkins
Nancy, I am a sales engineer for UniCam Software. UniCam has a new software tool called "Production Monitor", it connects to SMT equipment, monitors, collects and analyzes machine data. If you are looking to automate line utilization, cycly ti
Electronics Forum | Thu Jan 08 15:26:10 EST 1998 | Kathy Palumbo
We are currently in the process of analyzing Forced Air Convection Oven systems. The systems in the running are the Electrovert, Vitronics, Conceptronics, and Seho. Service is a big requirement for us. Our plant locations are in Dublin, Ireland an
Electronics Forum | Fri Sep 14 02:18:32 EDT 2001 | gsparka
Hi. After reflow soldering. There are lots of non wetting of leads. 71 b'd all are mounted resister,condensor,qfp,plcc,bga have got the defects so many. all defecs occured in the fine pitch ic. others are good. On some fine pitch pads not mou
Electronics Forum | Sat Oct 06 08:27:24 EDT 2001 | davef
Yes, some solder masks do not tent well, because the material is too thin. That�s the trade-off. Thin masks: * Conform well to [don't bleed onto] fine pitch features. * Tent vias poorly, requiring an additional "plugging" step. As you imply, if th
Electronics Forum | Mon Nov 26 20:15:50 EST 2001 | davef
Sounds like you are thinking correctly. I'd guess your fab has gotten "smart" and changed your bare board, as you suggest. So, you've got two choices: 1 Rework the QFP. 2 Remove the lower temperature PTH components and solder them to the board some
Electronics Forum | Thu Oct 31 11:29:34 EST 2002 | ricardof
When we buy equipment from a broker or used eq. dealer we try to support that equipment with our own skills, and this is achievable for new equipment or equipment similar to that one we're using. But when we buy older platforms or a machine with old
Electronics Forum | Tue Mar 04 17:47:19 EST 2003 | msivigny
Hello EW, thanks for your input, the data collection for measurements such as these can get confusing because you're calculating deviations from set point location to actual placement location and then analyzing the full result. Then there are many o
Electronics Forum | Mon Apr 12 10:39:48 EDT 2004 | Ron Herbert
Correct preheating of the assembly is critical. Check with your flux manufacturer regarding the recommended topside pcb temperature as it enters the first wave. It is important that this temperature be achieved without burning the flux on the bottom
Electronics Forum | Fri Mar 05 19:17:00 EST 2004 | Ken
I have had OSHA strap accumulative "sniffers" onto wave operators and maint. tech's. THe sniffers collect air bound particulates and trap them into a filter. Later the filter is analyzed and an operator exposure rate is determined. They also will la
