Electronics Forum | Thu Oct 26 21:05:10 EDT 2006 | hector.iduma@ge.com
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Electronics Forum | Fri Oct 27 11:48:59 EDT 2006 | stepheniii
I use adipic acid to clean our Ersa selective solder machine nozzles. Makes a huge difference and is quick and easy.
Electronics Forum | Wed Mar 08 22:20:11 EST 2006 | pmperreca
I was wondering what type of machine would be the best for high production rate of small pcb boards. A rate of somewhere near 800,000 units a month on a board that is approx 1"x2" 4layer with 20 components.
Electronics Forum | Thu Mar 09 15:04:41 EST 2006 | geocominc
Please advice how can we reduce a delta T of 40 degres between pads with a seven zones reflow for a LF Assy. max 255 min 215 board size 3x5 inches.
Electronics Forum | Thu Mar 09 15:18:07 EST 2006 | russ
First make sure that ALL of your fans and heaters are working! 40 deg. is one hell of a delta.
Electronics Forum | Thu Mar 09 16:05:22 EST 2006 | jdengler
What type of profile are you using (soak or straight ramp)? You may need to reduce the ramp rate or increase the time at soak. Jerry
Electronics Forum | Thu Mar 09 16:21:53 EST 2006 | geocominc
Ramp or Soak give us same Deta T (from 35 to 40).All probes are tested o.k.Should we pump in more heat upfront in order to warm up heavy loaded ICs like PLCC64 or Change blower speed? or Slow down line?
Electronics Forum | Thu Mar 09 16:33:30 EST 2006 | russ
Is there a way that you could plot the data points of your profile into excel and post somewhere? Or can you give us some data on what your profile looks like? What exactly does this board look like? thickness, size, copper weight?
Electronics Forum | Fri Mar 10 12:15:52 EST 2006 | geocominc
Increase Soak time & Slow down line did reduced Delta T by 10+,Fans are at max - Both High -getting closer to target now.Great idea.still more to do .Thanks for advices.
Electronics Forum | Mon Mar 13 10:56:37 EST 2006 | Bob R.
I would try swapping the hottest & coolest thermocouples where they go into the mole and see if temp readings follows the thermocouples or stays with the mole input. A 40 deg delta T on a board that small really sounds like a measurement issue.
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