Electronics Forum | Wed Dec 20 09:41:52 EST 2000 | blnorman
Ideally we want to mix the same lot numbers in a repackaged tube. Once again, these are partial tubes that have been thrown away. If the ratio is right to begin with the only change would be due to air exposure. Semco makes a TC seal which, if we
Electronics Forum | Thu Jul 22 07:52:37 EDT 2004 | Chris L.
Hi Grant, The purpose for allowing the solder paste to reach room temp before production is to reduce the amount of water absobtion from the air. (e.g. a cold glass of water "sweats" on a humid day)The purpose for mixing is to make the viscosity more
Electronics Forum | Thu Mar 24 17:36:31 EST 2005 | Grant
Hi, Yes MYDATA vibration feeders are a nightmare, but you might want to check the feeder. We had one that would vary a lot, and it never seemed to be able to be set to the right vibration level for consistent feeding. It turned out to have a problem
Electronics Forum | Tue Nov 28 21:03:48 EST 2000 | Dave F
Getting people to stop sounds like a good idea, but once they get running after a lengthy set-up, you can sort of understand why they don't want to stop when they quickly run out of paste after emptying a partially filled tube. Beyond the paste qual
Electronics Forum | Tue Jun 19 10:59:21 EDT 2001 | Gil Zweig
When x-ray inspecting BGA packages with metal heat spreaders tube voltages greater than those used for Plastic BGAs must be used. It must be recognized, however, that the tube votage required will depend on the particular sensitivity of the x-ray cam
Electronics Forum | Tue Jul 20 08:30:07 EDT 1999 | Mark Quealy
I recently switched from solder paste in 500 gram jars to 500 gram tubes. I did this to try to limit the time the paste is exposed to the room environment. But we have a need to clean the stencil every 4 - 5 boards which means taking the bulk paste l
Electronics Forum | Tue Jul 20 17:24:24 EDT 1999 | Deon Nungaray
| I recently switched from solder paste in 500 gram jars to 500 gram tubes. I did this to try to limit the time the paste is exposed to the room environment. But we have a need to clean the stencil every 4 - 5 boards which means taking the bulk paste
Electronics Forum | Tue May 20 05:01:27 EDT 2003 | gavinscott
Hi, I have had this problem in the past and the best method I found was... Before removing the old syringe and fitting a new one, ensure the viton tubing is doubled over and pinched. This will help to eliminate any airlocks in the viton tubing whic
Electronics Forum | Thu Feb 05 15:38:21 EST 2004 | mrmaint
Pete C We do bake our tray parts. I am familiar with the ipc specs. The problem is for example: a level 4 component can only be out a total of 72 hrs before rebake is required. If this is a tube or reel part, the 125c bake temp that is recommended wi
Electronics Forum | Mon Apr 26 11:26:36 EDT 2004 | rob_thomas
Hi, why don't you call tech support of the manufacturer of your vibratory feeders.They will be able to help you.This is mostly a trial and error kind of adjustment and there are various "tricks" that I've noticed in various assembling plants (i.e. ke
.gif)
