Electronics Forum | Tue Jun 23 05:48:17 EDT 2020 | ameenullakhan
Hi Sr Tech, Yes we do have a COC for every solder paste with viscosity measured. But some customers have there unique requirements. And its not useful arguing with them. Regards, Ameen
Electronics Forum | Mon Jun 22 15:53:35 EDT 2020 | cyber_wolf
This would be a highly unusual "requirement." In house checks on paste viscosity went the way of the buffalo years ago. The question to your customer should be: why ? All of the mainstream paste suppliers should be able to supply you with a COC th
Electronics Forum | Wed Apr 20 11:08:05 EDT 2005 | py
usual solder cream has a viscosity above 800 000pas at 25�C for each 1�C the viscosity change about 30 000 pas at 15�C you will have nothing ( 37% of viscosity less)on your board...
Electronics Forum | Sat Jul 03 08:52:19 EDT 2004 | davef
Q1: What's the difference between static and dynamic viscosities? A1: Static viscosity is the viscosity of the solder paste as it is dispensed off of a tube or syringe onto a screen printer. Dynamic viscosity gives the variation in the thixotropic b
Electronics Forum | Wed Jan 19 11:37:18 EST 2000 | Mark D. Milward
Does anyone consider the use of a Cyberoptics LSM solder paste thickness measurement system to be a valid test in determining the viscosity of solder paste. This procedure was proposed as an alternative to using the Malcolm gage for viscosity testing
Electronics Forum | Wed Apr 27 22:36:47 EDT 2005 | devilhitam
is there any relation between solder paste viscosity and the length of time the solder paste being used in the machine? pls advice....
Electronics Forum | Mon Aug 22 09:01:09 EDT 2005 | iwan
Well guys, I just buy a brand new solder paste softener Malcom type SPS2, I've tried with this with this viscosity result. I Use Almit Solder Paste Lead Free LFM-52X 1 min : 264 pas. 2 min : 272 pas. 3 min : 277 pas. I use standard for Viscosity 20
Electronics Forum | Mon Aug 22 09:35:54 EDT 2005 | cyber_wolf
First off, why do you feel you need to check paste viscosity ? I thought checking paste viscosity was a thing of the past ?? If you are having paste viscosity problems then it's time to get a new paste supplier. Any of the main paste suppliers have g
Electronics Forum | Fri Jun 25 09:19:12 EDT 2004 | tjensen
60-70% RH will be a challenge if you are running a water wash solder paste (and could be the reason you are seeing the problems). If you are running a no-clean, humidity should not be an issue. As long as the profile looks OK, I don't think the con
Electronics Forum | Thu Feb 10 09:14:09 EST 2005 | davef
Don't kid yourself, something has changed. * Worn stencils should produce better release and greater paste deposits than less worn stencils. * Consider inspecting the effectiveness of your cleaning process with a X10 magnifier. * Temperature in your
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