Electronics Forum | Wed Mar 21 15:32:08 EDT 2018 | padawanlinuxero
I agree with the other comment, if you have misprint something is wrong with the screen printing process, meanwhile try to get a ultrasonic cleaner for your boards, another thing you can do is to use dummy boards, if you don't have a lot of different
Electronics Forum | Thu Mar 22 20:26:54 EDT 2018 | jacobidiego
Thank you guys. And Yes, the process and knowhow of the team has a lot to be worked on, but Work Orders are of 5k to 10k units, so miss-printings will occur everytime that the printer is setup at the very least. I wonder if you have a PCB washer to
Electronics Forum | Wed Mar 21 14:58:23 EDT 2018 | edjeske
Thank you for your response. I appreciate all anyone can provide to help with this. I have no manuals to use. I inherited this task when the usual operator dropped dead the other day. He was the only one who ever ran this machine. I was able to print
Electronics Forum | Thu Mar 22 01:59:16 EDT 2018 | boskoncam
Dear, Good day! Currently, we are sourcing the English version service manual for YG200/YG300/YV180XG SMT machines . If you are available to provide for us , pls contact with us at any time. Thanks and best regards, Jenny Email: jenny@ksunsmt.co
Electronics Forum | Thu Mar 22 20:56:50 EDT 2018 | jacobidiego
Hi experts, I have some multiple and randomly missing components after reflow. PADs are seen in AOI as if the component was never there. I have seen no evidence of the chipmounters missing any components at all while populating the board. We don't ha
Electronics Forum | Fri Mar 23 03:18:08 EDT 2018 | bukas
hello Diego, I would start by opening oven and looking for missing components. once you locate them you can work from there. are you using any alu caps on your board? I had problem with bad alu caps exploding in oven and scattering other components.
Electronics Forum | Sun Mar 25 08:45:00 EDT 2018 | jacobidiego
Normally some random components of size 0604 or below and may be due to a thermal mass being close like a transformer or AC electrolytic caps. We tried changing fan speed, but this will change the thermal profile and avoid the thermal mass from bein
Electronics Forum | Tue Mar 27 01:52:23 EDT 2018 | buckcho
Hello Diego, are the components missing on the first side or the second side. Like Mr. Evtimov said, you can check before the oven the pcbs's visually and see what happens after the oven. In this way you can see if it is the oven for sure. Then there
Electronics Forum | Tue Mar 27 01:46:59 EDT 2018 | buckcho
Hello, can you tell me your SPI machine brand? Some brands have Bare board teaching for getting the best data when measuring paste. Even then it is normal to have more paste than 100%. So you can check your average and see if you are getting this on
Electronics Forum | Wed Apr 11 09:51:26 EDT 2018 | emeto
Diego, the first question you have to answer is "Is the paste volume too much in real?" How does your paste look? To check that, I would say you measure bare board with your SPI and see if your SMT pads show you zero, or may be not? If your value fo
