Electronics Forum | Thu Mar 16 22:19:38 EDT 2017 | deanm
First, reflow does not reset the clock for MSL exposure. The best solution is to run the second side before the exposure time expires. I am curious to know why they must sit for 40 hours. If that cannot be done, then store the assemblies in a dry c
Electronics Forum | Mon Apr 03 02:09:58 EDT 2017 | soldertraining
Restriction of Hazardous Substances (RoHS) bans products that contain a high level of hazardous materials from entering the market like the EU market. If we talk about PCB products - The printed circuit board services – including both conventional an
Electronics Forum | Thu May 04 10:10:03 EDT 2017 | rgduval
My machines do this kind of stuff all the time. Usually when I don't want them to! But, as long as you can control the z-height during plaacement, I don't see that it should be all that difficult to achieve....depending on package size, of course.
Electronics Forum | Wed Aug 22 10:28:19 EDT 2018 | buckcho
I have the same machines, haven't figured it out yet. Only idea i got is to scan every batch and get a rough number of the prints. For example if you have an order of 500 panels, usually it would take 500prints to produce them (maybe 4-5 differences
Electronics Forum | Sat Jun 16 19:51:39 EDT 2018 | reckless
I have a small 5mmx5mm 32 pin QFN I need to program and want to find a way to do it automatically. Companies like Xeltek charge $100,000 for an automated programmer and I think it can be done with a regular pick and place machine by placing QFN into
Electronics Forum | Thu Jul 26 04:26:59 EDT 2018 | Robl
Hi VChauhan, I'll preface this by saying I am no DaveF. Voiding can occur when the flux in the paste boils and vapourises, the expanding vapour needing somewhere to go displaces the paste. So... what we have done in the past: 1) Step the stencil d
Electronics Forum | Thu Aug 09 16:51:39 EDT 2018 | tey422
A good set of fixtures are what you need to get it done right. Since we are in the same area, I would recommend give ATD (Advance Tooling Design)a try, they located in San Jose. We been using fixtures from them for years. We build thousands of Fle
Electronics Forum | Fri Jan 11 02:19:54 EST 2019 | jlawson
Jetting paste is no easy , ball mesh size and metal loading, SG and the dynamic rehology of the flux medium need to be matched to the jetting forces from the dispensing system. There are many jetting valve makers Musashi from Japan, Nordson Lyquidyn
Electronics Forum | Fri Oct 12 09:16:21 EDT 2018 | directx995
Hello, We are EMS and we are using Unviersal Instruments machines, we have few GC60 and GC120. You didn't mention how old machine is, which is very important. Regarding picks, our GC120 do around 1 million picks PER WEEK when we are running LED proj
Electronics Forum | Fri Nov 16 09:28:08 EST 2018 | robl
If you are gang picking from 6 reels in a row for the same part, so the head goes down twice for 12 components, which is easily done on the boards you have previously described, you should see 18K+ per hour with decent panelisation. On an LED panel
