printing speed - paste vs. glue Views: 484

printing speed - paste vs. glue			Andrzej	10/08/09
printing speed - paste vs. glue			davef	10/08/09
	printing speed - paste vs. glue		Andrzej	10/09/09
		printing speed - paste vs. glue	davef	10/09/09

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Date: October 08, 2009 07:29 AM
Author: Andrzej  
Subject: printing speed - paste vs. glue

We have 250x340mm panel of PCBs. Stencil for glue would be 0,3mm with about 80 holes mostly for chip components. Our MPM printer at standard set, prints paste on 1 panel at 40-50sec.

I need general information if printing glue is faster or slower process in compare to printing paste.

(http://www.smtnet.com/distributed_forums/Index.cfm?CFApp=8&Message_ID=60066)

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Date: October 08, 2009 08:08 AM
Author: davef  
Subject: printing speed - paste vs. glue


Look here for some guidelines: http://www.smtnet.com/Forums/Index.cfm?CFApp=1&Message_ID=59924

(http://www.smtnet.com/distributed_forums/Index.cfm?CFApp=8&Message_ID=60067)

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Date: October 09, 2009 04:36 AM
Author: Andrzej  
Subject: printing speed - paste vs. glue


Thanks. Unfortunatelly I did not find answer on my question. Dispensing glue generally has much worse output then printing glue.

Question remains - how output of printing paste is compared to output of printing glue ?

(http://www.smtnet.com/distributed_forums/Index.cfm?CFApp=8&Message_ID=60075)

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Date: October 09, 2009 06:32 AM
Author: davef  
Subject: printing speed - paste vs. glue


Here's what is on that post referred to, not sure what you need more than ...

"* Stencil material: metal or plastic, no difference in print, metal is easier to clean, no static problem, available
* Stencil thickness: Chips 0.006", SOIC 0.010" [print height equals 1/3 thickness]
* For 0603, aperture size was an oblong shape , 0.030" long x 0.015" wide. A minimum of 0.010" gap between the aperture and pad, both sides.
* Snapoff: to increase dot height, upto 0.040" can be used
* Squeegee material: metal on metal, polycarbonate on plastic
* Print speed: 1 to 2" per sec
* Squeegee pressure: 0.2 to 0.3 kg/cm ... enough to clean wipe the stencil
* Separation speed: Slow ... 0.1 to 0.5 mm/sec over 3mm separation distance
* Print sequence: print print"

... further, we guess that you're printing at 1-2 inches per second.

(http://www.smtnet.com/distributed_forums/Index.cfm?CFApp=8&Message_ID=60078)