Electronics Forum | Tue Aug 28 12:05:42 EDT 2001 | mparker
The advantage of DPMO is that the numbers used are PPM, (Part Per Million), rather than percentage. Percentage can distort, depending on volume. For instance, 100 units processed, 25 defects found = 75 percent yield. 4 units processed, 1 defect found
Electronics Forum | Thu Aug 30 22:36:36 EDT 2001 | davef
While I don't understand why, this topic comes-up fairly often on SMTnet. [That the topic recurs indicates there truely is a problem and I'm just too doopy to understand it.] Several things: 1 Check the fine SMTnet Archives. 2 Some glue suppliers kn
Electronics Forum | Wed Sep 26 17:50:59 EDT 2001 | mparker
My Opinion/Editorial- Being a frequent (nearly daily) visitor to SMTnet I find postings by some sales types as being a shameless shilling to drum up business. We even experienced (most recently)an audacious posting that was thinly disguised as being
Electronics Forum | Tue Sep 18 13:58:01 EDT 2001 | ert002
50%) only over the appertures where there was poor support. Most prints took 2 knead strokes to print OK, but this caused fine pitch leaded devices to almost short. stencil had to be be wiped after kneading. 2 similar devices with exactly the same
Electronics Forum | Tue Sep 18 15:28:56 EDT 2001 | jschake
This is an interesting dilemma you have been faced with. If both machines are outfitted similarly and running under identical process settings then they should produce nearly the same results, in theory. I do not dispute the observations you are re
Electronics Forum | Fri Oct 05 08:35:52 EDT 2001 | Hussman
Hey Steven, Achieving the proper profile like you described does require you to engineer proper conveyor speeds and zone temps. Most conveyorized ovens have the inside of the ovens divided into zones. Each zone has a top and bottom heater that can
Electronics Forum | Mon Oct 08 03:42:31 EDT 2001 | Darby
Can't get on to the Heller email or website and I require an urgent answer. Has any one had any experience in reversing the conveyor direction and thus all the zone set ups etc in a Heller 1500w or similar. What did it cost and were you happy with th
Electronics Forum | Wed Oct 10 13:49:12 EDT 2001 | stepheno
I recently started at a new company. They have a variety of bare PCB's and most have aprox. 20 variations. Maybe about 1/3 of each board on average are non-populated locations. They buy one stencil for each PCB but then use scotch tape to block of
Electronics Forum | Mon Oct 22 19:22:25 EDT 2001 | davef
As an alternative, consider: * Searching the fine SMTnet Archives for the names of used equipments brokers, resellers, refurbishers, etc. * Contacting those folk on your Vitronics machine [or its siblings] * Contracting with them to make you a copy o
Electronics Forum | Tue Oct 23 08:38:52 EDT 2001 | MikeF
Dave, Thanks for the suggestion on the used equipment brokers. I had done a search of the Marketplace for this machine, but should have thought to contact one of the brokers. Vitronics can sell me a manal, but has noted the manual does not have any
