Electronics Forum | Fri Jul 27 13:16:03 EDT 2001 | cjrjmj
I am looking at the Pump application for several bottom side applications we have. They are heavy in through hole radial and dip content. The initial testing of the stencil was very good, but I am concerned with inspection of the glue. We do a sampli
Electronics Forum | Thu Jun 07 15:37:32 EDT 2001 | Claude_Couture
Kerryn, It's the first time I hear someone who needs an automated inspection machine to check the cleanliness of stencils. Why not improve on the cleaning method itself. I use ultrasonic batch cleaner. It takes 3 minutes to clean a stencil, 2 minutes
Electronics Forum | Wed Jun 06 21:19:41 EDT 2001 | davef
Consider running two sets of stencils and washing every four hours.
Electronics Forum | Thu Jun 07 13:40:12 EDT 2001 | kerryn
Dave, We have very short runs (less than one hour). We have stencils all over the place waiting to be cleaned. It is too time consuming to scope each stencil to inspect for cleanliness. Do you know of any automated or scanning devices that can ra
Electronics Forum | Tue Jun 05 13:23:27 EDT 2001 | kerryn
We are a high-mix/low-volume operation and end up cleaning 40 - 50 stencils per day. Does anybody know of an automated inspection system or "scanner" that can check a stencil for cleanliness?
Electronics Forum | Tue Jun 05 20:45:54 EDT 2001 | davef
So, yer lookin' to detect a ~25um glob on the wall of the aperture on yer stencil, eh? Why not wash your stencils before you put them away? That's what we do. Give 'em a quick looksee, then rack 'em, if they're clean. Give 'em anudda looksee befo
Electronics Forum | Thu Jun 07 16:33:22 EDT 2001 | davef
I too know of no product like you desire, but I have a lead for you to follow that might get you further than you're getting now. Call Lumonics [Lumonics, 130 Lombard St, Oxnard, CA 93030 805.485.5559 fax3335 http://www.gsilumonics.com]. They ma
Electronics Forum | Fri Oct 14 14:09:19 EDT 2005 | bschreiber
Your problem is not the 0.4 pitch. Your problem is the manual cleaning. Manual cleaning will only remove the solder paste from the surface of the stencil. What's more, manual cleaning will force additional contamination into the 0.4 pitch apertures
Electronics Forum | Tue Jun 05 16:40:46 EDT 2001 | kerryn
Thanks Phil. However, my objective is to identify stencils that are not 100% clean prior to sending to inventory. I want to catch it before the solder paste has a chance to dry and harden in the apertures. Kerry
Electronics Forum | Tue Jun 05 14:38:55 EDT 2001 | pteerink
You would be better served to check your print quality as you run. Any problems caused by dirty stencils ( plugged aps etc ) would show up right away as a defect. Search the forum for more on this subject. I seem to recall the same subject coming up
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