Electronics Forum | Tue Jun 06 11:47:33 EDT 2017 | stevezeva
Hi Zac, was that board finished with tin/lead HASL or leadfree/HASL? Also what type of flux were you using? Just because a board is fresh out of sealed packaging doesn't necessarily mean that it's going to solder well. The picture that I've attached
Electronics Forum | Thu Jun 08 17:39:28 EDT 2017 | zsoden
SuMoTe, that is a fair suggestion, but I believe will be a non-starter. The solder pump motors are actually 40V motors being run from a PWM 24V supply. I did one time try hooking up to a separate power supply up to 40V but all this seemed to do was m
Electronics Forum | Wed Sep 05 08:50:04 EDT 2001 | davef
No arument with others comments about moisture, but taking a different tact, consider that the volitle elements of the solder paste disppear as a function of the amount of time the paste is out of the container. [Maybe as a function of solder paste
Electronics Forum | Fri Oct 14 11:56:49 EDT 2005 | patrickbruneel
Mika, 1.) Is there a maximum board thickness where it would be almost impossible to get a decent hole fil? Answer: The thicker the board the further the solder has to travel and the more you depend on solderability of boards and components, machine
Electronics Forum | Sun May 21 23:29:38 EDT 2017 | zsoden
Hi all, We run an old Seho 1135C wave solder with a 63/37 pot at 250°C. It has been running well for a couple of years but we have noticed lately that all of the larger pads (terminal blocks, transformers, etc.) require additional solder to be appli
Electronics Forum | Tue May 23 03:43:22 EDT 2017 | zsoden
Oh wow that is very useful insight! I will remove and check next time we fire up the machine! How did you know the factory size of the intake hole?
Electronics Forum | Tue Jun 06 19:03:59 EDT 2017 | zsoden
Hi Steve, I just confirmed with the manufacturer and the HASL is tin/lead (or it is supposed to be, at least). Any suggestions for how to test for nickel vs tin/lead? We're using an alcohol based no-clean flux from Alpha.
Electronics Forum | Thu Aug 03 17:53:58 EDT 2017 | zsoden
That may just be an optical illusion. I've just measured and they're cut to just over 4mm (0.157"). The pot is at the level specified by the manufacturer (5mm from the bottom of the PCB if I remember correctly).
Electronics Forum | Fri Aug 04 07:20:10 EDT 2017 | emeto
Zac, for the profile I mean both - if your machine temp profile is inside the process window of your flux. Trying other fluxes might give you some answers.
Electronics Forum | Wed Aug 09 20:06:35 EDT 2017 | zsoden
Thanks Ed. I'll keep that in mind but at this stage I'll rule out the other options such as flux and heat profile first...
