Electronics Forum | Thu Mar 15 13:39:06 EDT 2018 | gregp
Impact is the instantaneous force at the time the component first reaches the PCB. F=M*a....so the acceleration is the key factor. If charted on a graph it would look like a spike...higher force for a short duration. The placement force is typical
Electronics Forum | Mon Feb 21 08:44:10 EST 2011 | kahrpr
They all are inlineish They just carry the board to the vapor chamber. in a reflow system all the boards in the oven from beginning to end are in state of process, which gives you more speed. If the board has a long cycle time VP is not a problem. If
Electronics Forum | Fri Apr 10 12:23:27 EDT 2015 | utosun
The recommended wash concentration for stencil cleaning with VIGON SC200 is 25% and this should be confirmed using the ZESTRON BA-20 bath analysis kit. Additional cleaning recommendations are: Wash temperature should be approximately 25 degrees C. /
Electronics Forum | Fri Jan 28 09:03:43 EST 2011 | ldavis
Shannon, We have been using VP for all of our lead free production since 2007. Here are the items I can think of off the top of my head. Pro's - small footprint, minimal profiling needed once machine is understood, oxygen free soldering process, s
Electronics Forum | Wed Apr 20 22:06:32 EDT 2016 | ttheis
With desktop/workstation computers I am of the opinion that they should be left to run 24/7 to avoid thermal cycling daily in order to prolong their life. I have dozens of computers between my home and business and I have had good success with this f
Electronics Forum | Thu Dec 09 12:29:39 EST 2021 | stephendo
With the bottom followed by the top set up, how do you even come close to balancing that? For a lot of boards that I have seen you would need five or more top lines just to handle one bottom line. Or have the bottom line on a very low duty cycle. B
Electronics Forum | Wed May 12 17:54:22 EDT 2010 | jlawson
Just a note, on fixed galden machines yes the way they compensate for rise time is as the previous post suggested, change power and also stage the lowering of the PCB into the vapor cushion ie not the main one but further up in the tank. The disadvan
Electronics Forum | Thu Mar 27 11:11:00 EST 2003 | blnorman
We've evaluated the Rheopump. Problems we've found are 1) cycle time differences between forward and backward print (evidently the pump charges pressure on one and not the other), 2) excessive amounts of paste left in the tubes (roughly 60 grams we
Electronics Forum | Thu Jul 18 17:29:18 EDT 2002 | pjc
Forget what the machine's max. placement cycle rate is spec'd for. For each board you assemble time the actual placement rate. To do this start the stop watch the instant the camera is positioned over the first fiducial on the first board, then stop
Electronics Forum | Tue Nov 28 05:31:04 EST 2006 | egrice
Lou, You should look at the ERSA/Modus AOI System! The Modus AOI uses a high resolution industrial scanner rather than a camera mounted to a gantry. It's way faster (12 seconds for whole board ) and can do everything that a camera can do and more
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