Electronics Forum | Mon Mar 12 14:08:03 EDT 2007 | coop
Thanks to all for the input I will try the preheating the "blank" out of it too. the preforming Idea I had wasn't the problem. I'll slow down conveyor speed and increase the preheater temp.
Electronics Forum | Mon Mar 12 17:16:45 EDT 2007 | coop
the problem must have been the ground plane like you were saying because I increased the preheater temp, slowed down the conveyor speed and they started looking better. Thanks to all for the input, especially davef. Thanks again
Electronics Forum | Tue Feb 19 22:57:38 EST 2008 | davef
Duno. What's the diameter of: * Finished connector lead * Finished through hole We reckon: Lead size plus ~0.25mm [0.010"] is normal.
Electronics Forum | Tue Feb 19 23:00:29 EST 2008 | amarpreet41
Connector pin - 10.83 mils Hole dia - 27 - 33 mils. We are trying to find the optimam level for hole dia.
Electronics Forum | Wed Feb 20 09:05:38 EST 2008 | tonyamenson
We had a similar problem with lead-free through-hole components. We baked those baords to remove the residual moisture and everything went to 100% pass - defect was gone. Couldnt hurt to try a sample run while you decide if the PCB holes need to be
Electronics Forum | Wed Feb 20 09:29:19 EST 2008 | mun4o
ni, I had similar problem too.I bake PCB in SW mashine - about 8h ,T=90 C.Problem is in the base material of PCB - there are moisture in the material.After my complaint to PCB factory , they change material and the problem disappear.
Electronics Forum | Fri Mar 09 12:41:56 EST 2007 | coop
I have recently been handed over the waving operation here, and am unclear on how to address our recent issue with our Wave. We are using AIM WS-715M Flux in a Foam fluxer, and are using AIM SN-100C in the wave. The problem is on several of the assem
Electronics Forum | Mon Mar 12 13:57:50 EDT 2007 | davef
That your problem is not related to component solderability or wave process related makes us believe this has to do with bare board design. Look at how your designer did the thermal relief on the two pins that don't solder well. If you can't get a
Electronics Forum | Wed Feb 20 12:22:14 EST 2008 | tonyamenson
iv40, I don't suppose you know/remember what base material you were using that caused the problem and what material you switched to was, do you? We just pre-bake all our lead free PCBs as a precuation but I would like to remove the process if I can
Electronics Forum | Mon Mar 12 11:53:52 EDT 2007 | realchunks
Hi Coop, Sounds like you are having top side wetting issues. Generally this is flux related, but with a foam fluxer, I'd kinda doubt it's the fluxer. Could be heat related as well. Try slowing the conveyor speed to verify. Long leads - hmmmmm.
