Electronics Forum | Wed Nov 29 10:50:24 EST 2000 | blnorman
Vacuum casting (same process used to make solid rocket motors) should remove any air from the paste. We had thought of pressurizing the tubes to remove the residual paste, but that would entrap air. The problem of tubes sitting out for different
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 | Sun Nov 19 23:28:38 EST 2000 | Richard Metrton
Hi, We are looking at both the Vitronics Soltec and the Ursa Hotflow with the flux management options and am intrested to hear what others on the forum think about these two products. We really want something low maintenance, and works well. I gues
Electronics Forum | Thu May 24 08:40:18 EDT 2001 | toolman
hi kris well 0.02 cents south african money is a lot less. but anyway we have a customer with 3 lines all lines are the same equipment and we have had major problems with 0402s .on some manf reels .as a test we moved one reel around and the problem m
Electronics Forum | Thu Nov 16 06:13:16 EST 2000 | Adam Seychell
I am currently building a home PCB etching tank based on the ammonia/ammonium sulfate chemistry. The etching system consists of a etching tank, and an electrolytic copper recovery tank. The result is a infinitely replenishable etching system without
Electronics Forum | Thu Nov 16 03:41:43 EST 2000 | Willem Combrinck
Hi everyone. I'm an industrial engineering student working at a manufacturing company in Cape Town, SA. Recently my boss wanted to know the causes of our downtime in SMT. Things like setups, unscheduled maintenance, debugs etc came up while I was doi
Electronics Forum | Thu Nov 16 09:45:11 EST 2000 | DL
Where are the experienced operators? I'm sure they would have some good input to what it is you seek. How would this program you wrote know if the operators went to the bathroom during setup? Or took break? Or even waiting on incoming parts from ship
Electronics Forum | Sun Nov 19 16:01:18 EST 2000 | Dean
Hi Friend. I recently went through this same project in my factory. Initially, I spent quite a bit of time out on the lines (6) collecting data. After getting an overall idea of where and what the activities were I created forms and work instructio
Electronics Forum | Tue Nov 14 13:39:37 EST 2000 | Mark S
Hi All -- I'm about to design a DPAK part (case 369A-13, Issue Z)onto a PCB . The part's maximum length as given in the datasheets (On-Semi MAC4DHM) is 0.030" longer than the recommended land pattern as given in that same datasheet. (1) Has anybod
Electronics Forum | Mon Nov 13 08:24:03 EST 2000 | G. English
Richard, From your description of the IC, as Wolfgang indicates it sounds like a 20mil pitch device, the aperture design really depends upon your solder paste particle size, we use a type 3 solder paste with a mesh size of �325 / +500microns. This is
