Electronics Forum: pass (Page 5 of 142)

manual stencil print 2 passes

Electronics Forum | Mon Dec 22 12:14:15 EST 2008 | pcbbuilders

we sometimes have problems with solder paste release. we use a manual stencil printer. does anyone have any thoughts on using two passes of solder paste on the stencil? i have found that running the second pass gives me better deposits on the fine pi

Stencil Printing Experiment without AOI

Electronics Forum | Mon Jan 06 23:25:29 EST 2003 | Dreamsniper

I made an experiment with our semi-auto stencil printer and used my naked eye to decide whether the alignment and deposition is pass or fail. I based the results in percentage and 100% is perfect result. Now here's the question: Can anyone tell me w

First-Pass Yield Information

Electronics Forum | Tue Jul 03 09:13:18 EDT 2001 | rstodd

I work for a memory module manufacturer and I am interested in obtaining information on typical first-pass yield numbers and failure rates in the memory module industry for benchmarking purposes. Any information provided would be greatly appreciated

Double sided reflow in one pass?

Electronics Forum | Mon Aug 16 18:37:15 EDT 1999 | Paul Wareham

Is there process by which one can do a double sided reflow (SMT on both sides) in one pass through the oven?

Re: Double sided reflow in one pass?

Electronics Forum | Tue Aug 17 16:12:51 EDT 1999 | Doug

Is there process by which one can do a double sided reflow (SMT on both sides) in one pass through the oven? Probably not. I have heard people talk of it but never see it done and I wouldn't recommend it. Good luck

Re: Double sided reflow in one pass?

Electronics Forum | Wed Aug 18 20:58:12 EDT 1999 | Dave F

Is there process by which one can do a double sided reflow (SMT on both sides) in one pass through the oven? Paul: Check Bob Willis' site (check the archives). Ta. Dave F

Second Pass In Wavesolder

Electronics Forum | Mon Dec 31 03:51:14 EST 2001 | hany_khoga

Dear all: We had a severe curvature in our boards after wave soldering.Could a second pass in the wavesolder m/c reduce this curvature. If not then what do you recommend to solve this problem. Also how it can be avoided. Best Regards Hany

Wave Pallet Lifespan

Electronics Forum | Mon Jul 15 18:29:55 EDT 2002 | russ

Are you talking about selective wave pallets? Most of it depends on the minimum thickness of masking walls (design). I have had some that have lasted until the product went EOL (5000 passes or so. and some have made it about 50 passes. How's that

cracked capacitors at SMT 1&2

Electronics Forum | Wed Aug 18 08:03:14 EDT 2004 | pr

Is this the first pass or second? We have found the screen printer on the 2nd pass to be the culprit more often than not. let us know your results, pr

Dewetting on Second side reflow?????

Electronics Forum | Tue Oct 31 13:22:51 EST 2006 | realchunks

Are you using Houdini brand paste? It really depends on the part and pad size, but I kinda doubt that you�re paste is disappearing during the 2nd reflow. Do a side by side comparison of first pass versus second pass reflow and show your operator.


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