Electronics Forum | Thu May 10 15:32:45 EDT 2012 | 14367
We are having a lot of tomb stoning with this no clean solder paste. It's limited to larger, complex boards, affecting 0603 ferrite beads, capacitors and SOT23s. It was suggested that paste removed from a stencil should not be put back in it's origin
Electronics Forum | Wed Apr 29 10:05:05 EDT 2009 | wavemasterlarry
you have to lots of paste. one makes balls, one doesnt. Then why bake parts to over come bad paste? Sounds like the paste maker mixed the formula wrong on the one lot of paste. I used to work at a paste place and a lot of hand mixing is done at t
Electronics Forum | Mon Nov 01 16:22:47 EDT 2010 | jax
Who Cares... Mix Away! Although you should not mix different Solder Pastes' together in a container or on a stencil (Mostly due to the flux, although solder sphere size and shape could cause an issue), mixing solder brands or chemistries on a board
Electronics Forum | Thu May 10 22:16:51 EDT 2012 | davef
It's bad practice to remix used solder paste with new solder paste in the jar. Further, some would argue that it's bad practice to reuse solder paste period. If economics force you to reuse solder paste, store it for reuse in an empty jar. When rea
Electronics Forum | Fri May 11 10:59:39 EDT 2012 | 14367
Thank very much for the feedback. I was asked why mixing the paste was not a good idea. Could you provide the answer please? It's always better to hear from an outside expert:) The SOT23 - some of them have actually flipped upside down ; plus we hav
Electronics Forum | Thu Jun 05 12:15:51 EDT 2008 | cyber_wolf
We have hand mixed several million grams of solder paste in the last 20 years. No problems to date.
Electronics Forum | Tue Dec 07 05:16:12 EST 2004 | kanwal324
We are using solder paste of Alpha Metals 390DH4. As per manufacturer guidelines the viscosity of paste after 1/2 hr. conditioning and after mixing in paste mixer,it shoule be between 800-1250KCP. Our customer is asking for viscosity to be maintained
Electronics Forum | Tue Feb 06 06:41:53 EST 2007 | pavel_murtishev
Good afternoon, You have to use lead paste since none-RoHS components won�t withstand elevated temperatures. Solder paste manufacturers offer a lot of transitional pastes designed specially for mixed process. Ask your paste supplier for transitional
Electronics Forum | Wed Jun 04 07:56:36 EDT 2008 | ck_the_flip
Does anybody use a paste mixer in their shop? I am looking at one that uses "Psuedo-Planetary Motion" to mix and soften solder paste. If someone answers "yes", has this benefitted your paste consistency and improved your print repeatability?
Electronics Forum | Wed Feb 23 07:53:48 EST 2000 | John
Anyone out there have any experience with paste dispensing equipment? With our high mix of baords and very low volume (