Electronics Forum | Fri Sep 10 14:21:39 EDT 2021 | majdi4
Evtimov , i agree with Thomas.. you don't have to take your mesure in the middle of the stencil since the sheet of the stencil has the same thickness everywhere either in the corners or in the middle.. So you can ask from your stencil supplier to mak
Electronics Forum | Tue Aug 07 12:18:37 EDT 2001 | delnosa
Looking at ideas for "best in class" process controls for SMT mfg. ops. Wanting to add improved p-controls at some of our suppliers and I'm looking at what others may or may not recommend. Already looking at the following: Solder Printing X-Y-Z axis
Electronics Forum | Thu May 03 01:07:18 EDT 2007 | pavel_murtishev
Good morning, Worth system for 0.5mm or more pitch paste printing. For less pitch (uBGA, 0.4mm etc) framed stencil are preferred due to better tensioning. Main issue with them is handling. Stencil apertures that are used for tensioning might be easi
Electronics Forum | Wed Oct 27 16:12:36 EDT 2004 | Grayman
Hi ALL, Please confirm what measuring instrument do you use on stencil measurement. may we know the brand and website of this instrument.? We also need to measure the sencil tension but we do not have the instrument. Thank you, Arman
Electronics Forum | Thu Sep 09 12:56:39 EDT 2021 | emeto
Thank you for your reply Djo. What do you consider a normal range tension for 29" stencil on a hard frame? Also I am not sure how I can use micrometer in the middle of 29" stencil to measure the thickness? CAn you please clarify?
Electronics Forum | Tue Oct 26 00:49:42 EDT 2004 | pilengr_tw
Yes, we have an SOP on how to measure. Basically, calibrate the measuring device and measure tension on the 4 sides and one at the center of the stencil. All measurement should be within 30 ~ 50 N/cm otherwise we will not use it and return it to sten
Electronics Forum | Mon Oct 25 20:15:20 EDT 2004 | pilengr_tw
Davef, Thank you for your reply.You are right that I need to consider the tickness also of the stencil. Previously, I take for granted this process of measuring the tension and I usually let my technician do that. However, I have to determine the pra
Electronics Forum | Thu Sep 09 08:02:14 EDT 2021 | majdi4
Hello Evtimov , two parammeters must be controlled : 1) Frames tension must be controlled with tension meter ( attached photo ) 2)Also stencil thikness must be controlled with a Micro meter palmer
Electronics Forum | Fri Nov 12 05:14:42 EST 1999 | S L CHANG
We are currently cleaning solder paste (TAMURA SQ-1030FP) from stencil using an ultrasonic stencil cleaner with solvent (HYSPER-Non CFC). The process cycle time is 30 sec. cleaning in 1st ultrasonic tank and another 30sec. cleaning in 2nd ultrasonic
Electronics Forum | Thu Jul 21 10:48:02 EDT 2011 | emeto
We use QTS and Vectour guard. I would prefer Vectourguard - it is very siple to set it up. However, you have to check the tension of the stencil everyday. I wouldn't trust them as 29 inch hard frame. It is always a metter of quantities. If you deal w
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