Electronics Forum | Fri Apr 18 11:05:47 EDT 2014 | horchak
First things first. Check the manufactures specs on the electrolytic caps as they may not be able to handle the lead free temps.
Electronics Forum | Thu Apr 24 12:18:01 EDT 2014 | cyber_wolf
You must thermally profile your circuit boards with a data-logger and thermocouples. Just putting in oven set points and looking at solder joints is not enough. Reference IPC-7530
Electronics Forum | Thu Apr 17 17:57:13 EDT 2014 | proy
Hello We use a 5 zone conceptronics HVN70 and never before have we had something we could not do including 6 layers Rohs complicated boards. Recently we had a larger - simple 2 layer board - all 1206's etc however there are 15 pcs of a LARGE high m
Electronics Forum | Wed Apr 23 09:38:05 EDT 2014 | rgduval
Get in touch with your paste manufacturer. They should have a data base of different oven types/zones, and can give you "baseline" settings for a medium thermal density board that has been proven to work well with their paste. After that, it sounds
Electronics Forum | Wed Dec 10 13:26:03 EST 2014 | spoiltforchoice
I don't have one, but a lot of ovens of this vintage are on the market because they DO NOT cope well with lead free processes. There is one of these on eBay right now and it even says ROHS is right at the limit of what it can just about manage so thi
Electronics Forum | Wed Dec 10 16:14:37 EST 2014 | jimpat
The 300 degrees is the temperature as measured at the sensor. The actual air temperature just above your PCB may actually be much less. If the oven is properly calibrated then the 300 should represent air temperature at the board but I have seen ma
Electronics Forum | Fri May 11 06:45:57 EDT 2007 | jdumont
On some of our boards we cut the clinched leads with an old Q Corp cutter. Works fine as long as the blade is sharp and the lead isnt bent against the board. Youll know when you go to far on the clinch because the mass lead cutter will begin to start
Electronics Forum | Thu May 10 19:22:06 EDT 2007 | joeherz
We have a board that requires a .015 - .035" finished lead length which requires us to do mass lead trimming. To this point we've performed this activity on parts with straight leads. We're looking at going to an axial auto-insertion process (outso
Electronics Forum | Fri May 11 07:38:14 EDT 2007 | tombr
It is possible to vary the length of lead during auto insert. However, it requires software and mechanical adjustments. Universal equipment allows small changes via software program for lead length. To change angle of clinch involves a mechanical a
Electronics Forum | Thu May 10 21:45:41 EDT 2007 | davef
Comments are: * Mass lead trimming equipment suppliers are: ** Q Corp; 301 River St, Derby, KS 67037; 800-835-1099 316-788-3746 F316-788-7428 qcorporation.com qcorp@qcorporation.com ** Microscan [LT1821 Lead Trimmer]; ?? ** Roto-Form; PO Box 118; Si
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