Electronics Forum | Mon Jan 09 18:57:13 EST 2017 | sssvajunas
What is optimal smt room temperature and % of wetness?
Electronics Forum | Tue Jan 10 16:01:20 EST 2017 | davef
A review document for J-STD-001F with Amendment 1 had the following wording, but you should check the actual document to be sure of correctness 4.2 Facilities Cleanliness and ambient environments in all work areas shall [D1D2D3] be maintained at le
Electronics Forum | Sat Feb 28 08:15:50 EST 2004 | davef
J-STD-001 has what you need. 3.6 Facilities ......................... 4 3.6.1 Environmental Controls ........... 4 3.6.2 Temperature and Humidity ......... 4 3.6.3 Lighting ......................... 4 3.6.4 Field Assembly Operations ........ 4 3.6.5
Electronics Forum | Tue Apr 19 07:37:48 EDT 2005 | mirrindolan
I am looking for all the reasons why operators and stores must let solder paste reach room temperature. I am trying to make it is as easy as possible for everyone to understand. I have compiled all the obvious reasons but I am open to all comments an
Electronics Forum | Fri Apr 22 19:43:01 EDT 2005 | steve
And don't re-refrigerate the paste. It's fine left out at room temperature and sealed. If you want to know why simply ask and the next 8 respondants will tell you.
Electronics Forum | Tue Apr 19 09:13:49 EDT 2005 | bobpan
Try printing while the paste is cold.....you get nothing but bad prints!!!!
Electronics Forum | Fri Apr 22 15:59:42 EDT 2005 | Valerie
Besides poor printing using cold solder paste will also cause solder beading.
Electronics Forum | Fri Apr 29 19:57:53 EDT 2005 | DasonC
Moisture will condensed on your paste if the temperature different. Solder bead will happen. You can see the jar or cartridge wet when you removed your paste from refrigerator.
Electronics Forum | Tue Apr 19 09:09:28 EDT 2005 | russ
Here is one reason- It eliminates the viscosity change during printing operation from the paste warming up and getting thinner. I would contact your paste supplier and have them give you the full list.
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...
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