Electronics Forum | Thu Mar 06 14:54:52 EST 2003 | vortex
Hello Mike, Recently a customer questioned why my company does not perform SPC readings. My answer was simple, we collected data for about a year without any major problems that couldn't be determined by simply looking at the pcb. It has been ab
Electronics Forum | Mon Mar 10 10:17:15 EST 2003 | gregp
Tact time as defined by the IPC 9850 standard is "the average time required to place a single component while maintaining the specified placement process capability. Excludes transfer time, fiducial time and nozzle change time." Sounds like what you
Electronics Forum | Mon Mar 10 10:28:23 EST 2003 | pjc
Tact times published by placement equipment suppliers usually do not account for board load/unload. Placement time standards set for your boards must include load/unload time. I measure from first fiducial read on board 1 to first fiducial read on bo
Electronics Forum | Mon Mar 10 14:52:10 EST 2003 | MA/NY DDave
Hi You really received some good replies. It seems like the best replies are a BLOW to one of your engineers, at least from a terminology view point. "No cake tonight". Yet it doesn't mean (s)he is better or worse than the other. Tact Time from a
Electronics Forum | Wed Apr 09 15:05:45 EDT 2003 | russ
Probably of no help but here it is anyway This is a tuff one. Attrition is due to many factors. You have machine rejects (visual fail, no pick), feeder set-up loss each time a reel is removed you lose X number of parts depending on feeder design (w
Electronics Forum | Thu Apr 10 10:12:33 EDT 2003 | Claude_Couture
Chrissie, You have my deepest sympathies! But I'm very curious about your business takling a space contract. The quantity of boards that you mentioned hints at a GPS satellite systems, am I correct? In any space quality manufacturing, every step of
Electronics Forum | Mon Apr 28 11:52:28 EDT 2003 | hruiz
Thanks for your responses, as gregp says, one hour in changeover is not good when you run only 10 panels, we alredy do from 10 panels to 2500 boards per run, depends on the product, we already have a pre-kitted area mounted in their respective feeder
Electronics Forum | Fri May 16 11:42:06 EDT 2003 | JB
We have used "feeder templates" in the past to keep components, that are shared by different products, on the same feeder slot number and it has worked well for us.We create a "master set up" say for product A that use 60 different components, the ne
Electronics Forum | Tue Jun 10 10:58:54 EDT 2003 | Frank
Hi, I currently work on SMT department to uptimize all process. I've just selected the solder paste after testing 15 different products. To be able to do that, I had to create a procedure to evaluate each paste and to be sure that my profil was per
Electronics Forum | Wed Sep 10 10:45:09 EDT 2003 | vickt
Yukim, First off..sorry I haven't responded to this already. I hadn't noticed any responses in a while. I would be very surprised if you have worn nozzles in a two year period, but it is possible. For instance, if you have been running with an extra
