Electronics Forum | Fri Apr 15 11:15:14 EDT 2011 | wrongway
Hello all lets see you are wanting to place 60,000 parts a day make sure you derate the machines you are looking at to about half of what they claim and your change over will take some time as well we do several change overs each day up to six tim
Electronics Forum | Mon Apr 18 10:07:19 EDT 2011 | wrongway
Hello Jebs we started out that way but the more handaling of the pcb the more problems you will have if you can do it in line and have the pcb's stop at some of the conveyors you can do some inspection. yes all of our machine's are in line now we lo
Electronics Forum | Wed Apr 13 13:40:27 EDT 2011 | jebs
Hi. the res/cap is mostly 805, solder paste will be led free and will only have a few fine pitch IC on each board. The boards will contain between 140 - 160 components and will run a production of 300 - 500 each day with only one or two different boa
Electronics Forum | Fri Apr 15 13:25:40 EDT 2011 | tsvetan
agree, if you have fine pitch components the placement rate will be much less of what you see in the catalogues as they quote 0805 components placemen rate. I have one year log for one of our machine which is quoted to be 6400 cps and for one year a
Electronics Forum | Fri Sep 17 23:11:30 EDT 2004 | KEN
I have an application that uses 0201 devices coupled with ceramic column grid arrays. The coplanarity of the balls is specified not to exceed 7 mils! 4 mil foil for 0201's with a selective buildup to 7mil for the ceramic. Bloody designers! Take y
Electronics Forum | Wed Sep 15 22:01:34 EDT 2004 | rohman23
We've had a few problems with printing a flex-rigid PWB, and I'm hoping some of you could throw some opinions/suggestions my way. Our PWB is about 8" x 11" divided into two parts (side A & B) by 2 wide flex cables. Each of these flex cables is ab
Electronics Forum | Thu Aug 26 04:35:54 EDT 1999 | Wolfgang Busko
| | | Does anyone have any information on stencil aperture/pad ratios for noclean solder paste. In the past I have experienced severe solder ball problems when using the same size apertures from aqueous products as I do with the No-clean products.
Electronics Forum | Wed Mar 27 16:54:47 EST 2002 | davef
STARTING RANGES * Pressure � 1 pound/inch of blade (metal); 1.6-3 pound/inch (plastic) * Speed - 0.5 to 3 inch per sec [for standard pitch]; 0.5 to 1 inch per sec [for fine pitch] Your paste supplier�s recommendation is a good place to start. * Sepa
Electronics Forum | Tue Apr 27 13:41:16 EDT 1999 | Scott McKee
| i am trying to design a stencil fixture for manual printing. has anyone done this before or has an idea? thanks | There are sooo many variables; product size, 1 vs. 2 sided boards, support, component size, pitch, stencil alignment, PCB thickness,
Electronics Forum | Fri Jan 03 12:01:46 EST 2003 | jax
Alot of the companies out there use Standards developed internally, centered around there paste, equipment, and reflow processes. Normally you will see either 5mil or 6mil stencils used for everything in house with the exceptions of specific boards.(
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