Electronics Forum | Tue Oct 01 15:48:56 EDT 2002 | lysik
No problem. A standard stencil is OK. You want to print a half moon shape on each side of the hole. Make sure you print about X2 the size of your hole and make sure you keep the print in close to the hole. You want to print X2 the hole size as to hav
Electronics Forum | Wed Oct 23 12:06:09 EDT 2002 | russ
It sounds like you already know the answer! How much does it cost you to solder P.T.H. by hand (number of pins/per hour, / cost of assembler) vs. wave preparation and time of loading/masking etc... Cost of rework from each process? Only you can mak
Electronics Forum | Fri Oct 18 21:31:15 EDT 2002 | caldon
Many times the board may look the same but incases there could be subtle differences that could cause your process to go out of process limit. With boards that look alike you still need to consider: Solder paste (Is key to the reflow profile) compone
Electronics Forum | Wed Nov 06 11:12:33 EST 2002 | blnorman
I agree whole heartedly. Unfortunately in the different industries I've worked (garment, appliance, aerospace, and now electronics) this is a common issue. These procedures are in place for product reliability as well as safety. I trained at the
Electronics Forum | Mon Nov 04 17:29:34 EST 2002 | pjc
Cannot comment on "best buy". You'll have to determine what the better machine is for your application and duration of planned use. I suggest taking a field trip to each vendor's nearest demo facility with a few of your most hi-tech boards and stenci
Electronics Forum | Mon Nov 25 15:55:32 EST 2002 | davef
Sorry, no tricks for you. The good news is: your reflow recipe should be similar for both imm tin and HASL. Imm tin requires more attention to detail by both the fabricator and the assembler than HASL. There is a fair amount of discussion on imm
Electronics Forum | Tue Nov 26 15:53:30 EST 2002 | NSX
Does anyone reliably place 20 mil pitch QFPs with a zevetech 570laser upgraded to 575 with a VCS camera vision system? Different spec sheets seem to conflict with each other, and even the people at juki have given me different specs. If anyone has an
Electronics Forum | Mon Feb 03 23:55:58 EST 2003 | MA/NY DDave
Hi If this is the tombstoning I know which is evidenced by parts touching each other and some obvious colored material at the edges just wash them again real good. Now you might want to do some IR tests just in case you will have a reliability hit.
Electronics Forum | Tue Mar 04 09:24:18 EST 2003 | moncav
Because of my invovement with one of the companies mentioned, I will try to be as unbiased as posible. There is an incresing trend toward using this type of support tooling and there are a few players in the game. They each have their own niche in
Electronics Forum | Wed Mar 12 09:31:55 EST 2003 | MA/NY DDave
Hi Greg, You sound like a buyer or procurement professional. Everything you listed is OK, and more or less. Quite often Engineering Design or Product Management in the OEM establishes what they feel are some of the basic T&Cs. I guess I would ask
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