Electronics Forum | Sun Mar 09 18:33:04 EST 2003 | Dean
Tact time is a poor measure of your throughput capability. The Number of boards produced per hour or shift or 24 hour period is the true measure of what you are really doing. Your theoretial "tact time" can be used as a metric to judge performance,
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 | Mon Mar 10 19:01:32 EST 2003 | Stephen
This touches on one of my pet peeves. Management types demand something, that is not feasible or practicle. So the manufacturers put something together to pass off as what was asked for. In this case a way to put hard numbers on what a machine can
Electronics Forum | Sat Mar 08 02:43:16 EST 2003 | Frank
We are trying to implement AOI into the mix. One PE wants it Pre-Reflow, to catch and fix the PnP screw ups and the other PE wants it Post-Reflow, because the oven will fix quite a bit of placement offsets and mainly to catch any problems that the R
Electronics Forum | Wed Mar 12 09:18:10 EST 2003 | MA/NY DDave
Hi Thanks, Going to APEX to see personal demos and hear what they offer and recommend is a great idea. I mean if you want to put AOI everyplace I am sure you will be supported with open arms. What I found interesting in the article was that large
Electronics Forum | Fri Mar 14 09:23:52 EST 2003 | MA/NY DDave
Hire a Consultant to look at everything (Again lots to be looked at and worked... (Starting right at Board Design 2>Buy or borrow some of the Books on SMT and read about all the potential contributors. Yes Uneven or Goofed Up Oven Reflow as noted
Electronics Forum | Tue Mar 11 10:19:00 EST 2003 | yngwie
We ran doublesided SMT thru Glue and Wave process before and but faced a lot of skip solder. Then the customer told us that they have similar problem when they ran the board so what they did was they print the paste-dispense the glue- place the comp
Electronics Forum | Thu Mar 13 15:13:17 EST 2003 | ruggi
That's a good idea...and to add on to it, you could wash after the wave, too--it really doesn't matter. A question about this though--unless your Customer specifically requires "clean", no-clean flux whether it's ugly or not, is permitted by IPC,
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