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Standard for Stencil printers edges pressure

Views: 1843

#41041

Standard for Stencil printers edges pressure | 18 April, 2006

Hi guys:

I'm trying to get the recommended pressure for stencil edges using air compression, I'm working with I-source but they don't have any standard like IPC or something that can help me to use and decrease the replacement of stencil because of wrong setup. The pressure they recommended is 35-46 lbs-in. But i heard about 90 lbs so I need if someone have an standard or spec for this issue.

Thanks!!

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#41043

Standard for Stencil printers edges pressure | 18 April, 2006

There is no standard, nor should there be [because the IPC standards should be aimed at describing results, not the path used to reach the results]. So, your printer equipment supplier recommendations are a good starting point.

Your "35-46 lbs-in" makes our eyes bug-out [not to talk about what we think about the 90 pounds], but we most likely use different style blades, units, or sumpin.

We use depleted uranium blades. We begin at 1 pound per inch and then increase squeegee pressure just high enough to wipe the stencil clean.

Isn't I-Source a stencil fabricator? So, what do they know about setting-up your printer?

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#41058

Standard for Stencil printers edges pressure | 19 April, 2006

"We use depleted uranium blades."

He'll be here all week, folks. Try the veal!

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RDR

#41060

Standard for Stencil printers edges pressure | 19 April, 2006

Look at your paste specs, they give you recommended starting points relating to speed and pressure.

Dave F is right, it is usually about 1 pound per linear inch of squeegee length.

Speed for finepitch printing should be started at about 1in/sec.

These settings are dependent upon machine and paste.

Russ

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RDR

#41061

Standard for Stencil printers edges pressure | 19 April, 2006

Depleted uranium???? am I missing something here?!

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Curt

#41062

Standard for Stencil printers edges pressure | 19 April, 2006

Really, you have been a great crowd!! Don't forget to tip your waitress.

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pr

#41066

Standard for Stencil printers edges pressure | 19 April, 2006

I think she's talking about frameless stencils, and how tight it should be. I could be wrong though!

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RDR

#41068

Standard for Stencil printers edges pressure | 19 April, 2006

Well, that would make more sense!!!

Do you not have a manual for your printer? Contact the MFGr. of your machine.

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#41069

Standard for Stencil printers edges pressure | 19 April, 2006

depleted uranium blades!!!!

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RDR

#41074

Standard for Stencil printers edges pressure | 19 April, 2006

What is a depleted uranium blade?

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#41075

Standard for Stencil printers edges pressure | 19 April, 2006

I just flew in from (insert city) and boy are my arms tired.

pr: Likely, you're correct. The "pound-inch" units should have been the give-away, for us. Good catch. If this is the case, the frame fabricator would be the best source for tensioning information. For instance: * LPKF�s ZelFlex: 4-6 bar / 60-90 psi depending on stencil thickness * Dek VectorGuard: 4 bar of air * AlphaTetra: 50N / spring

"The problem ['stencil tends to bow in the middle when clamped' from a previous thread on SMTnet] is probably the result of a low quality thin walled frame. The company that originally came up with this design uses a 1/8" wall frame. This frame does not bow at the standard 40 Ncm tension. There are thinner walled "knock offs" of this frame that do not hold up to the tension and have a tendency to bow." [Elias SMTnet]

I-Source is probably the frameless stencil fabricator that markets the reusable frame, which is why they're talking about tension, rather than the printer equipment supplier.

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