Electronics Forum | Tue Dec 28 09:52:28 EST 2010 | flipit
Use a 0.002" to 0.003" thick stencil. Use an electroformed stencil from Photo Stencil or one of the others. Use -500 +635 paste or a -500 paste or type 5 or greater paste. I have printed at 0.008" pitch with 0.004" pads. It can be done.
Electronics Forum | Thu Feb 25 17:34:21 EST 2021 | roblackey
I think you are going to struggle without a laser designed for PCBAs (Asys, XJ Link etc) as they are designed to just burn into the resist and give good defininition, then readback to know you have a good mark. Key tips for our experience: Datama
Electronics Forum | Wed Sep 01 13:42:28 EDT 2004 | cmiller
We use a small DI water generator feeding a diaphram type pressure tank going to a standard dishwasher. We have some filters in-line also to prevent white residue on no-clean boards. I cant think of a good reason to buy a $5,000 board cleaner rather
Electronics Forum | Wed Nov 16 18:25:11 EST 2005 | Mike F
Check out the Unit Design web site and look at their drag soldering machines. You do not want to try to do any of this manually. How consistent are your operators when working above a 500 F solder pot? I strongly recommend you buy one of the books
Electronics Forum | Fri Aug 03 11:09:33 EDT 2007 | realchunks
Well, Ray Rassmussen believes that "IT" may put China on it's ear. Not sure about any of you, but I never felt the need to splash water on my face whilst reading this white paper. Hate to see how he'd react to seeing a board going over a 500 degree
Electronics Forum | Tue Dec 08 08:52:42 EST 2009 | cunningham
How do people prepare there solder paste for screen print? We currently remove them from the fridge and mix them in a 500g solder paste tub mixer to mix the flux and paste together we waste to much paste at the moment as we only use the tub for 1
Electronics Forum | Sat Jan 09 13:05:25 EST 2016 | aemery
Wow! a 500, That's a Battleship there, old and may leak a lot but gets the job done. Mike Schwager is a great guy and knows his stuff. If he doesn't have the time or resources I would be happy to be his backup if you're in a pinch. I generally onl
Electronics Forum | Fri Jun 02 11:11:11 EDT 2017 | jsmith145
Does anybody have any information regarding an Omegameter 500 (Kenco Industries)? We’ve run 4000+ tests with this machine and all have produced a pass result without a single failure, starting to wonder if tests aren’t accurately assessing PCB cleanl
Electronics Forum | Thu Apr 20 09:49:01 EDT 2000 | Dave
Why worry about the temperature if the top of the chip is 20 degrees C above eutectic - 183 C(at the balls)...if a machine works at convection oven temperatures, with high power, then there's no need to worry...Also, a CSP is a very forgiving chip.
Electronics Forum | Wed Sep 19 10:34:44 EDT 2018 | sarason
Now I have to guess and make a few assumptions. Without looking at the back side of the board my guess is you have some 400-100V diode bridges before the resistor ,zener and the FET . The FET is a 500V 0.85 Rdson NFET. All of this suggests a chopper
