Electronics Forum | Fri Sep 05 13:21:26 EDT 2008 | gregoryyork
We manufacture a low cost machine completely Air driven for Misprints only but dont have an agent in the USA unfortunately or could have demo'd it for you They do work very well with IPA derivative cleaners but IPA on its own is very poor. Best metho
Electronics Forum | Tue Apr 14 17:39:34 EDT 2009 | gregoryyork
Sorry been away for a while. It is actually due to high boiling solvents or plasticizers leaching from the porous resist that kills the cure as it puddles out and has nothing to adhere to. We do have some wipes to check the cure and are looking to ma
Electronics Forum | Tue Aug 04 17:17:17 EDT 2009 | gregoryyork
Certainly does look like solder deposit across the board. Check to see if fluxing correctly. Best way is to hand flux the PCB ensuring you put plenty on. IF you still get the same result then probably down to resist absorbing the flux due to porous r
Electronics Forum | Tue Nov 03 18:09:17 EST 2009 | gregoryyork
I think most have summed up the first pictures also is the drillng looking like it is misregistered as well. Better to do a solvent test to determine resist cure not the old stuff the newer chemicals show under cure problem much better. Try your st
Electronics Forum | Mon Jun 18 04:21:22 EDT 2012 | brettrenishaw
Measured the pot temprature independantly from the software (268C/514F from moving wave). We are using Dross Inhibiter Tin/P Regenerator from BLT. Monthly sample checks are carried out on the solder bath and are all within limits. It will be hard to
Electronics Forum | Tue Aug 07 09:44:44 EDT 2012 | parmar01
Hi All Im new to the forums, And this my first thread. im the production manager at Broyce Control Everything ive learnt about wave soldering is by trail and error i know its not the best way but it has worked for me. The problem i have been
Electronics Forum | Fri Dec 15 08:00:57 EST 2000 | Pete B
John, We regularly wave solder electroless silver finished boards (Alpha Level)with mixed SMD and through hole parts and do not have any problems. We have changed a number on PCB's from HASL to electroless silver, mainly for the benefits at SMD whe
Electronics Forum | Fri Jul 23 05:14:40 EDT 2004 | greg york
Hi Thomas Ever considered that this maybe HASL flux left on PCB as this is extremely hygroscopic and has heat transfer fluids that cannot be baked out unless you go to a temperature of around 600C. One way of testing is to leave iron tip on joint an
Electronics Forum | Wed Aug 11 07:20:33 EDT 2004 | gregoryyork
HASL Fluids are generally not RA based fluxes. They are generally fluxes based on hydrochloric acid or hydrobromic acid or a mixture of the two, plus some very strong wetting agents that are very hygroscopic. Doesn't the residue of hydrochloric go wh
Electronics Forum | Thu Aug 12 13:34:03 EDT 2004 | gregoryyork
Yes unfortunately solder resist again, getting boring I know. That green stuff on the boards causes all kinds of problems if not applied correctly. Can't blame the flux (as usual) or the process as he has tried all varients to no avail and therosin s
.gif)
