Electronics Forum: stencil (Page 72 of 540)

Squeege Snap off (MEASURED?)

Electronics Forum | Mon Jan 15 15:00:11 EST 2001 | pr

It is the distance between board and stencil. When your stenciling solder paste you usually want to contact print (which is "0" snapoff). When you are stenciling adhesive you can affect your dot size and quality by using a gap between board and stenc

Metal foil is pulling away from the screen.

Electronics Forum | Mon Feb 19 13:49:44 EST 2001 | markkrmp

Bill, It is my understanding that in using the Smart Sonic to clean Adhesives from stencils and mis-printed boards it is recommended to have the system up to a certain heated temperature. What is that recommended temperature? Does this temperature

Stencil Cleaning OnBoard Forum Now In Progress

Electronics Forum | Wed Feb 21 20:00:09 EST 2001 | davef

Sounds like you received some good advice. Most of our stencils are used once a day [at most], so more often than not they are air dried. If we goof-up and need to reuse a stencil during a day when we have limited drying capacity, we wipe the lowes

Adhesive Application by Stencil

Electronics Forum | Thu Mar 22 16:19:40 EST 2001 | rwilliams

In regards to SMT adhesive application by stencil: Can anyone make any recommendations for: SMT Adhesive Material itself? Squeegee Blade Material? Stencil Material? Characteristics/Features of your Stencil? E.g., thickness, aperture ratios, etc... P

Is more epoxy better?

Electronics Forum | Wed May 30 17:59:16 EDT 2001 | jollyrodger

It may be the case (if you are using stencils to apply the epoxy) that you will have to indeed use a stepped stencil to appply the epoxy at a greater height. Not being an engineer i am not completely clear with the involvements of stencil design -

Is more epoxy better?

Electronics Forum | Wed May 30 17:59:24 EDT 2001 | jollyrodger

It may be the case (if you are using stencils to apply the epoxy) that you will have to indeed use a stepped stencil to appply the epoxy at a greater height. Not being an engineer i am not completely clear with the involvements of stencil design -

Stencil cleanliness and inspection

Electronics Forum | Thu Jun 07 13:40:12 EDT 2001 | kerryn

Dave, We have very short runs (less than one hour). We have stencils all over the place waiting to be cleaned. It is too time consuming to scope each stencil to inspect for cleanliness. Do you know of any automated or scanning devices that can ra

Manual Stencil Alignment

Electronics Forum | Wed Jun 27 15:21:28 EDT 2001 | H.Richter

Hello; Can anyone give me advise on the best way to manually align a 20"x20" stencil on a semi-automatic printer? We have a board with a 16 mil pitch QFP and have difficulty aligning the stencil. We have tried various alignment schemes on the pcb an

Re: Stencil Aperture Reduction Guidelines

Electronics Forum | Fri Dec 17 01:21:54 EST 1999 | Victor Salazar

Weare using a Home plate design on 1210 or larger, 20% reduction on pkgs from 1206 to 1210, 10% reduction on 1206 or smaller, 0 reduction on all leaded components(sot-23, IC's) with a 6 mil stencil. For fine pitch we are using 4mil stencils. We h

Re: electroformed stencils

Electronics Forum | Mon Jun 07 07:18:23 EDT 1999 | tannlin

Hi everybody, Somebody know the advantages of electroformed stencils on laser cut stencils ? any coment is apreciated. thanks Al Al As far as I am aware most of the big OEM's and CEM's have tried and rejected frameless sten


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