Electronics Forum: overprint and solder and stencil (Page 1 of 15)

Differences between screen and stencil printing

Electronics Forum | Thu Dec 16 15:00:20 EST 2004 | glaucon

Simple differences. Both processes require a very similar machine platform, controlled motion, vision fiducial recognition and alignment of a substrate (PCB or hybrid ceramic) to the "image", the image being either a stencil (hence stencil printing)

Nub bying p&p, stencil printer and reflow.

Electronics Forum | Wed Apr 13 07:50:10 EDT 2011 | jebs

Hi. I've been looking for SMT machines and have a budget close to 100k total on a stencil printer, p&p + feeders and reflow owen. Witch machines would you choose with this budget? Have any one of you heard of evest? http://www.evest.com.tw/product.h

Nub bying p&p, stencil printer and reflow.

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

Nub bying p&p, stencil printer and reflow.

Electronics Forum | Fri Apr 15 11:14:13 EDT 2011 | smtmax

Hi. I've been looking for SMT machines and have > a budget close to 100k total on a stencil > printer, p&p + feeders and reflow owen. Witch > machines would you choose with this budget? Have > any one of you heard of evest? _a class=roll > href

Re: screen printer and stencil printer

Electronics Forum | Wed Aug 18 21:10:23 EDT 1999 | se

| | | Hi, | | | I'd like to ask some tips about the merits and shortcomings o | | | of both screen printer and stencil printer. For small quantity and highly mixed usage, which type of printer is suitable to our | | | application? | | | The board

CCGA and overprinting?

Electronics Forum | Mon Oct 15 10:51:49 EDT 2001 | davef

On over printing, the general issues are: * Paste deposits being so large that when reflowing, collapse onto many, rather than a single solder mass. * Paste expanding during heating and being close to other solder deposits and bridging [as you say].

CCGA and overprinting?

Electronics Forum | Fri Oct 12 09:17:12 EDT 2001 | mikecampbell

Hello, I need some advice. I want to create apertures in my stencil for a IBM CCGA. I've heard the standard is 4800 cubic mils of paste per aperture. I usually use a 5mil stencil for this type of product. There is no way I'll get enough paste wit

CCGA and overprinting?

Electronics Forum | Mon Oct 15 11:03:24 EDT 2001 | mikecampbell

Dave, Thanks for the info! Yes, I have read the IBM document and realized that I was missinformed about the paste volume. I need 5000 to 5600 cubic mils of paste. Running the numbers I get a 32 mil aperture with a 7 mil step (the rest of the board

CCGA and overprinting?

Electronics Forum | Mon Oct 15 12:42:36 EDT 2001 | davef

I hate getting "roped" into math stuff, but here I go again ... Area of aperture = volume of paste / stencil thickness = {[5000 mil^3] / 5 mil} = 1000 mil^2 Side of the square aperture = Sqrt of the area = [1000 mil^2]^1/2 = 32 mil Diameter of ape

small and good pick and place machine

Electronics Forum | Thu Sep 05 23:18:03 EDT 2013 | feiyangniao

There is a new toy I received today: a NeoDen TM-240A automatic desktop pick and place machine! I’ve kept my eyes on this baby for a quite a while, and finally decided to make a purchase last week. The shipping was very fast: DHL from China, a total

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