Electronics Forum | Fri Jul 20 13:50:22 EDT 2018 | vchauhan
This question is regarding stencil design: I am having voids under QFN TI P/N LMZ20502SILT. I have attached component pic. Signal pin is 18X16 mils. Center pads are 31 mil sq. Initially I had stencil done with one mil per side reduction on signal pad
Electronics Forum | Fri Jul 27 09:47:20 EDT 2018 | davef
Adding to Rob's suggestions ... One of the theories about voiding in thermal / ground pads of BTC is: Solder starts melting at the edge of the pad and moves inward towards the center of the solder mass. This traps flux volatilizes. So, there needs t
Electronics Forum | Tue Jul 24 09:20:44 EDT 2018 | fugtussey
Note that the TF2800 features a large 7 panel preheater with an adjustable height component that allows you to adjust the height of the IR preheater to get much closer to the board. This feature multiples the power of the preheater exponentially, so
Electronics Forum | Wed Aug 01 15:18:40 EDT 2018 | dleeper
One option might be to convert the coil to through hole and use intrusive reflow AKA pin in paste. the coil leads would have to be formed perpendicular to the board instead of parallel. you would have through holes instead of SMT pads, but you would
Electronics Forum | Thu Aug 02 21:22:15 EDT 2018 | davef
I need your input. What are your thoughts? Currently SMTnet is looking to improve process. It uses four different lists of categories that all are maintained and updated separately. A single LIST makes sense. Approaches to arranging the LIST being
Electronics Forum | Thu Sep 27 09:43:53 EDT 2018 | directx995
Hello everyone, I've been working on a project to create Cycle Time Calculator. To be simple, easy to use, and fast. We are EMS, we do a lot of calculations and offers, it takes time. I want to design calculator which will work without adding exampl
Electronics Forum | Mon Oct 22 08:27:49 EDT 2018 | filipblad
Hi, We're having issues with our mydata tp9 pick'n place. It doesn't go all the way down on the tool, so it can't pick it up or install it. The fault code I get when trying to install tools is F-TLMN-18: Can't reach tool bank. Any ideas? I've comp
Electronics Forum | Thu Nov 22 02:10:39 EST 2018 | robl
Probably just evolved - just different needs at different times. Back in the day for example there were lots of patents around turrets so different manufacturers went different ways. These have mostly run out now, so different technologies call for
Electronics Forum | Wed Feb 13 11:23:14 EST 2019 | aldrich17
We have several issues with components placing properly onto designated leads without having to offset our boards fiducials before population. For several of our boards, we cannot set our fiducials "dead center" but rather offset them in various dir
Electronics Forum | Thu Jun 27 08:47:21 EDT 2019 | SMTA-John
Having success with Circuit Boards #432 Solvent Resistant Ink - Designed specifically for circuit boards. This medium dry ink is highly resistant to solvents .... It is also non-conducting. Note: this ink contains an aggressive solvent so should not
