Electronics Forum: frameless stencil (Page 1 of 7)

Problems with frameless stencils on MPM??

Electronics Forum | Thu Jul 14 12:28:41 EDT 2005 | james

We use the Frame with the frameless stencils, but they seem to not be as tight as the stainless steel frame stencils

Problems with frameless stencils on MPM??

Electronics Forum | Wed Jul 13 08:46:15 EDT 2005 | james

Does anyone else have problems with the frameless stencils on the MPM UP2500. I noticed after I do a stencil height adjustment it looks like the vacuum actually pulls the stencil to the board.

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

Problems with frameless stencils on MPM??

Electronics Forum | Thu Jul 14 07:59:33 EDT 2005 | james

The tactile sensor seems to be fine. I think it may have something to do with the stencil being not as tight as to one that is on a stainless steel frame. When we set the height of the stencil we have to do it towards the back of the stencil becaus

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 12:11:58 EDT 2005 | geb

The vacuum will pull the stencil towards it if there isn't a frame because the front and back of the stencil aren't being supported by anything. Can't you use a frame, they're only about �20.

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 | Wed Jul 13 09:01:48 EDT 2005 | dougs

if your vacuum is getting through your board then it sounds like your vacuum tooling is wrong. you shouldn't have vacuum points at areas of the board where there are PTH's or via's.

Problems with frameless stencils on MPM??

Electronics Forum | Wed Jul 13 10:43:16 EDT 2005 | james

I dont have much choice because the vaccuum is right underneath the whole board, it sucks the board fairly hard. The only thing holding the board is the vacuum and board supports.

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