Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.

SMTnet
»
Electronics Forum
»
Equipment to measure stencil tension

Equipment to measure stencil tension

Subscribe to Thread

Hi, I need to start measuring the stencil tension at my fac... - May 26, 2011 by Manoel

I used this for a couple of weeks some years ago, I was able... - May 26, 2011 by Jorge_Quijano

Please explain why you would want to measure stencil tension... - May 26, 2011 by Sr. Tech

I also was kind of wondering to why you need to measure sten... - May 26, 2011 by KaHrpr

contact Tom Desistofrom Four Points. They have developed one... - May 27, 2011 by stentech

This is a requested point from some customers. It's part of ... - May 30, 2011 by Manoel

Manoel, We have never heard of such a request from a custom... - May 31, 2011 by Sr. Tech

I also never heard of that. Even if you measured the stencil... - May 31, 2011 by KaHrpr

One of our customers also recommend us to check the stencil ... - Jun 01, 2011 by Jorge_Quijano

Things of this nature make us raise an eyebrow. Something a... - Jun 02, 2011 by Sr. Tech

Manoel

#64359

Equipment to measure stencil tension | 26 May, 2011

Hi, I need to start measuring the stencil tension at my factory. Does anybody know a good tensiometer to tell me? A good brand and trustable? Thanks!

reply »

Jorge_Quijano

#64362

Equipment to measure stencil tension | 26 May, 2011

I used this for a couple of weeks some years ago, I was able to detect some issues whith some stenciles, but I did not use it for a long time, it may help you.

Attachments:

PS-US-TetkoMat-PDF.pdf

reply »

Sr. Tech

#64363

Equipment to measure stencil tension | 26 May, 2011

Please explain why you would want to measure stencil tension.

reply »

KaHrpr

#64366

Equipment to measure stencil tension | 26 May, 2011

I also was kind of wondering to why you need to measure stencil tension.

reply »

stentech

#64371

Equipment to measure stencil tension | 27 May, 2011

contact Tom Desistofrom Four Points. They have developed one

reply »

Manoel

#64377

Equipment to measure stencil tension | 30 May, 2011

This is a requested point from some customers. It's part of the audit check points. But I agree it´s important for the process. You can garantee the stencil is in a good condition after many time using it. If your stencil looses the tension, you can face some issues during the printing process as shorts and insufficient solder.

reply »

Sr. Tech

#64382

Equipment to measure stencil tension | 31 May, 2011

Manoel, We have never heard of such a request from a customer. I can't say that we have ever had issues with stencil tension unless we were using frameless foils or the binding came loose.

reply »

KaHrpr

#64383

Equipment to measure stencil tension | 31 May, 2011

I also never heard of that. Even if you measured the stencil tension what would be the spec be and how would that even relate to quality. Other than the stencil just flopping around I doubt that minor changes in screen tension are going to change anything. I would ask your customer to give you their specification for stencil tension. I would be real interested in what they came back with.

reply »

Jorge_Quijano

#64400

Equipment to measure stencil tension | 1 June, 2011

One of our customers also recommend us to check the stencil tension, they say that the stencil must keep its tension according to manufacturer spec, (36N for most cases), We are not doing it for now, and I dont really think low tension can generate such defects, I remember to see stencils even whith broken mesh printing well at least >0805

reply »

Sr. Tech

#64405

Equipment to measure stencil tension | 2 June, 2011

Things of this nature make us raise an eyebrow. Something along the lines of automatic solder paste mixers......

reply »