Electronics Forum | Mon Dec 31 08:59:36 EST 2001 | Don Adams
The second pass in the wave is pretty extreme and will probably aggravate the conditions which caused warpage in the first place. Areas to look for problems, The lay up of the boards at fabrication or the materials used can lead to warpage. Work wi
Electronics Forum | Fri Feb 15 00:39:09 EST 2002 | Jones
I've noticed that after we have switched to Transition Automation blades on our MPM screen printers that the stencils seem to be wearing out faster and I see a wavy rippling effect across the length of the stencil thats impacted by the squeege blade.
Electronics Forum | Wed Jun 26 08:53:32 EDT 2002 | davef
We have not done a DOE on board warping. Consider: * How close the board gets to its Tg during the reflow cycle * Amount of copper on each side and the balance between the two * Thickness of the board * Overall length x width * Time at temperature
Electronics Forum | Thu Jul 25 15:14:05 EDT 2002 | dsorg
In the case where fiducials with a HASL finish are removed from a panel in the depanelizing process, what do most people do for disposing of the rails? Since the HASL finish has lead in it, is it generally required that they be disposed of like print
Electronics Forum | Sat Aug 17 07:48:43 EDT 2002 | bentzen
Hi Brandon. You should always try to optimize / "balance" your line in a way so the machine with the shortest time per placement is your bottleneck. The other machines in the line should then have a 10 - 20 sec sorter cycle time, to be able to cope
Electronics Forum | Fri Nov 08 09:24:16 EST 2002 | rspoerri
Hi, I'm setting up an new production line for cell phone manufacturing and am looking for a second printer for the back half of the line. I am looking at both new and used though used is looking pretty attractive due to the glut of equipment curren
Electronics Forum | Fri May 09 10:44:41 EDT 2003 | gregp
"Point of use" could be your common high runner parts. They are sometimes kept next to the machines (at the point of use) and may be categorized seperately from the rest of the inventory. In your case all of your parts are inventoried next to the m
Electronics Forum | Fri May 09 11:09:47 EDT 2003 | k_h
Each machine has two feeder tables, one is fixed, the other interchangable. Parts on both sides of the machines does not create a kitting problem but can be inconvenient for feeder replenishment. I have found "U" shaped lines to be much more operator
Electronics Forum | Wed Jun 04 18:57:37 EDT 2003 | Rivkin
Hi Guys, How do you calculate throughput? and what's the standard allowance for some hidden downtimes like pick-up miss, pick-up errors, parts/feeder replenishment etc. say i have 4 machines that are not properly balanced in tact time: A= 3 mins
Electronics Forum | Fri Mar 05 06:50:58 EST 2004 | t_white
Does any one out there have any experience with this machine? If you do, what are some pro's and con's associated with it? There are not to many of these installed in the U.S. so hopefully someone across the pond can give me some feedback. BTW...W
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