Electronics Forum | Wed Jan 09 15:21:50 EST 2019 | dontfeedphils
Large and small levels, chalk line, plumb bob, pallet jacks, johnny bar, a 2x4 + sledge hammer, and a couple of the same PCBs to test transfer between machines.
Electronics Forum | Fri Dec 03 18:04:52 EST 2021 | SMTA-64387687
Why don't you use peelable/washable solder mask on the SMT components next to the T/H pins? Then, you won't have to worry about keeping the tight tolerances.
Electronics Forum | Mon Feb 26 20:22:01 EST 2001 | davef
As a design rule, provide 0.050" minimum between parts to be "masked" and areas that require wave contact. The more the better is the general rule to apply. Check: http://www.autogroup.com/designguideb/ http://www.spprecision.com/ http://www.datumdy
Electronics Forum | Wed Oct 06 09:40:49 EDT 1999 | Mark Quealy
I have an adhesive dispenser in my workcenter but I rarely use it. I've replaced this process with wavesolder pallets for bottom side PTH soldering, ocassionally gluing parts left exposed by the pallet. So I was thinking of selling the dispensing equ
Electronics Forum | Wed Jul 09 17:07:51 EDT 2003 | msjohnston
Like many others out there I am new to SMT assembly on flex circuits. In the past, we purchased flex assemblies manufactured from a sub-con. Now we will be building internally. Are there any guidelines when building products with flex circuits? Wa
Electronics Forum | Fri Aug 12 17:36:06 EDT 2011 | grics
Dave is correct. Also, you should check the TDS's of the caps and the display before processing to see if they can withstand the process temps, look for a recommended solder profile or info for the manufacturability of the device. On another note,
Electronics Forum | Fri Apr 28 10:50:26 EDT 2017 | emeto
Hello experts, Here is my problem: I have a board that has smt parts on one side and TH parts on the other. We designed special pallet for wave, but the pallet itself is 15mm thick, so we are still seeing some defects. Have any of you tried to find
Electronics Forum | Fri Feb 16 06:47:38 EST 2007 | CL
vshan, We were using pallets (delmat with cavities for the flex) We put stips of double sided Kapton tape in the critical areas. The tape held up to the heat and kept the circuit flat for the QFP's and BGA's. We based our assembly process for this c
Electronics Forum | Fri Apr 27 08:58:49 EDT 2007 | ck_the_flip
There are several pallet manufacturers, Ascentec Engineering, Pentagon EMS, and S&P Engineering - to name a few - that make titanium inserts for wave pallets. These inserts (inserted into your delmat or CDM material) will act as your pockets to mask
Electronics Forum | Tue Sep 29 11:37:52 EDT 2015 | robl
Hi Marlyn, We use durastone pallets over a wave - so areas machined out so the solder can get to the pins but not the SMT. You can also get fancy selective solder machines, but I'm guessing that as you're asking you haven't got one. Hope that help
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