Electronics Forum | Thu May 25 18:32:12 EDT 2006 | pms
Having an issue with our paste inspector (human type). Were printing paste on .5mm pitch pads (MLF package). My question is - What is the acceptable print deviation (percentage) off the pad before you see problems after reflow? 0%? 1%? 10%? 25%?
Electronics Forum | Fri May 26 08:16:14 EDT 2006 | Chunks
This could be what we call a "non-problem". If your print is off slightly, yet after reflow there is no solder related defects, it should be considered OK. Move your inspector from the printer to right after the oven. This would enable them to ins
Electronics Forum | Wed Jun 07 22:33:50 EDT 2006 | Bolos
first: what is your problem after reflow? second: a good rule of thumb is a tolerance of 1 mil. for example..if you got 5 thou stencil thickness then your range of thickness is 6-/+1 thou.. then you just improve after you get your height data and ana
Electronics Forum | Fri May 26 09:52:46 EDT 2006 | samir
Dave, For lead free, I've always left the ramp part the same and just spike higher in the reflow zone. I've also slowed things down a bit (5" per sec. slower)....without using prediction software, try, say... Z4 200 & Z5 260.
Electronics Forum | Sun May 28 23:01:31 EDT 2006 | jacksaria
Hello to all, We are encountered many problems/defects in SMT lines.I would like to know your suggestion or recommendation for SMT optimization and improvement. What are the step by step solutions in order to optimized and to improve the printer, pi
Electronics Forum | Wed May 31 16:09:14 EDT 2006 | barryg
Did You verify operation of the oscillaators(resonaters) by heating and cooling and looking at the waveforms and frequencies when doing so. We have problems when they are not packed correcttly from vendors , and sometimes they can get crackes in them
Electronics Forum | Sat Jun 10 07:27:24 EDT 2006 | davef
Chuckie: SM4007A Diode case is D0-214AC G. Eisner: On tombstoning: * Check reflow profile * Pads per IPC-SM-782 * Reduce amount of solder paste * Check component solderability * Place component accurately * Search the fine SMTnet Archives for backgr
Electronics Forum | Mon Jun 12 10:22:24 EDT 2006 | Chunks
Are you buying new or replacing existing equipment? Are you getting this equipment to achieve lead free? Man, I'm surprised MoonMan hasn't jumped all over this? I mean as a consultant who also pumps equipment - this would be a perfect fit for him.
Electronics Forum | Mon Jun 19 09:51:36 EDT 2006 | mmjm_1099
I have a question in regards to buying used machines. I would like to know if I buy used what kind of support by the manufacturer is covered if any? I am looking into buying a new line but I see the used market is flooded with stuff so I want to star
Electronics Forum | Mon Jun 19 13:56:59 EDT 2006 | netellink
Bolos, Why you have to purchase the Titanium solder pot for your lead-free? I have the MDS-200 Unit Design Drag solder and I just empty the solder SN63PB37 in the solder pot, clean it very well and buy lead-free solder bar to fill up the pot. David
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