Electronics Forum | Wed Aug 14 18:17:32 EDT 2019 | slthomas
We are down to the last few unresolved PCBA test failures in a work order and scrambling to get them repaired and into a mechanical assembly. What we have found in quite a few of these cases are cracked 1206 MLCCs. The failed parts are all the same
Electronics Forum | Wed Sep 04 13:32:22 EDT 2019 | bobpan
Try these things: 1. Do a function 30....your nozzle height should consistently be around 200 +/-20....but whatever number it does find it shouldn't change. (with nozzle on) 2. Most times its the z-bellows....an old z bellows that has a worn out spri
Electronics Forum | Fri Sep 27 15:14:04 EDT 2019 | dilogic
Just one more thought - we had an issue with +12V supply for VME rack. One tantalum cap in the DC/DC converter module for linear encoder interpolator shorted it out, but oddly enough - not always. We ended up hooking scope to all PSU voltages and whe
Electronics Forum | Wed Nov 27 08:54:03 EST 2019 | ttheis
Hi Tushar, Thanks for the reply. I do believe I put it into debug mode but I will be sure to check next time I try logicomm. I am not using any RAMTF or PTF. At the moment I have upgraded the machine from EPC-5 to EPC-5-66 which I found cheap. The
Electronics Forum | Wed Dec 04 08:00:57 EST 2019 | kylehunter
Thank you both. We are using EP256 Solder Paste Sn63Pb37 no clean from Kester. I attached our profile as well as Kester's target profile. We used a populated demo board for the profile. We tested along the width, and was less than a 2c difference.
Electronics Forum | Tue Dec 17 14:11:43 EST 2019 | kylehunter
Haven't run those boards again, so haven't had the issue.. Since it seems like we may want to start using more aggressive flux based paste soon, what are some good choices? Ideally I'd like to stay with Kester, since they are readily available. EP2
Electronics Forum | Mon Jan 06 13:49:14 EST 2020 | slthomas
A lot of people also assume that the filtration is for cleanliness of the gasses that are leaving the plant, and that is not the case. I helped spec. (like you, Rob, I let someone else do the math) a system like yours, with a single common main trun
Electronics Forum | Mon Jan 06 20:53:23 EST 2020 | mikeyg12
Hello everyone! I have had this idea in my head to DIY a desktop KVM (without the V so I guess just a KM) board that I can solder USB A headers to with a DPDT switch. I designed the board and when I thought it was all good to go I proudly sent it of
Electronics Forum | Wed Jan 08 16:27:11 EST 2020 | rmitchell
We have a PCB with the dual sided connector that slides on from the edge and has leads on the top and bottom sides of the PCB. It has 20 leads on each side of the PCB with with about .8mm pitch. The PCB also has a gold grounding strip on the edge fo
Electronics Forum | Tue Jan 28 12:32:44 EST 2020 | jede
We have had a few large human error, wrong placement in the SMT set up over the past year(same package size placed in the wrong feeder position to where it goes unnoticed) and we are trying to look for possible process improvements to prevent this fr
