Electronics Forum: stencil (Page 122 of 540)

Stencil fiducials

Electronics Forum | Wed Jun 22 10:53:43 EDT 2005 | pr

Yes, They do have to be the same. If not you'll have to put in some ridiculous offsets. If they are not located in the same place (as mentioned earlier) use 2 pads that are off by themselves (if possible) and increase wipe frequency, because your ste

Paste sticks to squeegee

Electronics Forum | Tue Jun 28 02:37:17 EDT 2005 | grantp

Hi, Check to make sure your paste is not dried up, and it should roll across the stencil, not slide. Also, if your running in a cold environment, then that can stiffen up the paste, and it will still to the blades, and not roll over the stencil corr

Problems with frameless stencils on MPM??

Electronics Forum | Wed Jul 13 13:35:07 EDT 2005 | chunks

Maybe you stencil height measurement is being affected. Check your tactile sensor, it may be sticking due to paste or adhesive getting on it.

Problems with frameless stencils on MPM??

Electronics Forum | Wed Jul 13 15:18:50 EDT 2005 | pr

Sounds like your stencil might not be tight enough. Are you having print problems because of this? If not I wouldn't be too worried about it. good luck, pr

Problems with frameless stencils on MPM??

Electronics Forum | Thu Jul 14 14:30:33 EDT 2005 | pr

The big advantage of frameless is storage space. The big disadvantage is getting the stencil tight (and cuts on operators). pr

Problems with frameless stencils on MPM??

Electronics Forum | Thu Jul 14 15:31:55 EDT 2005 | jdengler

This is why I disqualified frameless stencils. All that I have seen do not seem to be tight enough. Introducing 1 more variable into screen printing did not seem like a good idea. Jerry

Height of USB Connector

Electronics Forum | Fri Jul 15 16:27:55 EDT 2005 | davef

It depends on how much paste you put on the pads. Assuming your stencil is 1:1 to the pad and the solderability protection on the board is something other than HASL, we'd guess that your solder height is approximately 50% of your stencil thickness,

would like any input on MPM problems

Electronics Forum | Fri Jul 15 13:56:18 EDT 2005 | chunks

Here's an easy one. Make a camera that looks up at the board a non-mirror image. You could keep the mirror image toward the stencil since stencils rarely have any legend on em.

Stencil manufacturer

Electronics Forum | Mon Aug 22 14:20:22 EDT 2005 | CC

UTZ Engineering West Coast Div.is located near San Diego. they make good chemical etched stencil and turn around is very good. Hope this helps. Could not remember the city but you could find them in the directory easy. Regards,

Stencil manufacturer

Electronics Forum | Wed Aug 24 02:12:55 EDT 2005 | Al

Can anyone recommend a good stencil manufacturer > in the San Diego, CA area. Check this out. http://www.hitechstencils.com


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