Electronics Forum | Sat Jan 08 08:50:35 EST 2005 | davef
Normally, you should not have to bake boards that are properly packaged and stored. Since you are seeing problems, baking makes sense. Consider 125C for 4 to 6 hours. Additionally, look here for more, while waiting for others: http://www.smtnet.
Electronics Forum | Tue Jan 11 13:15:54 EST 2005 | dorklover664
Just try to do family set up with it. It will move almost every part to a diffrent place. My old programer had to do it all by hand if it was to be done at all. Normaly we just left the old parts in there and added the new ones. Talk about slow. But
Electronics Forum | Wed Feb 09 13:25:08 EST 2005 | jdumont
Good day all, I am wondering if there is a company out there that sells kits that contain a board, components and the stencil? When we get our new reflow and wave machines in I will need numerous boards to run and evaluate until I can get the process
Electronics Forum | Fri Feb 18 10:19:55 EST 2005 | aj
Hi, As stated by everyone ,you really should have a Profiler and be checking the oven at least once a week. As a quick fix to Identify if you are reaching reflow temp at all, I would recommend that you buy some Thermal Indicators (temp. stickers)th
Electronics Forum | Thu Mar 17 22:47:29 EST 2005 | davef
That would be our first guess, also. Get the stuff analyzed to be sure. Another clue is if the white stuff disappears when you hit it with hot air from a rework station. The hot air is activate the flux. Good troubleshooting tool, but you're subj
Electronics Forum | Thu Mar 17 11:07:08 EST 2005 | Dougs
I'd agree with Justin, we do double sided reflow on most of our boards with fine pitch QFP's both sides, you do have a problem somewhere else, what size is you board? Is it warping slightly? What kind of oven are you using? Is it convection? fans
Electronics Forum | Mon Mar 21 09:50:29 EST 2005 | davef
It's possible to remove 1mm from each side of the board. Obviously, you need to avoid damaging the board circuitry or the display. If we were going to try this, we'd poke the working end of a Sears router through a hole in the table and fixture a w
Electronics Forum | Wed Mar 23 20:44:25 EST 2005 | pmd
Sounds like EA has way too much free time on his hands. How are you taking a reading. What instruments are you useing to get a reading. What are you looking for? Voids? Adhearsion? Contamination? Why would you need to know what it takes to break a co
Electronics Forum | Fri Apr 08 17:23:34 EDT 2005 | KEN
Warpage factors can cause: 1. Boards can not transfer down conveyor belts or wedge at transitions. 2. May not enter into machinery due to interferences (like board clamps) 3. May fall off conveyor chain in furnace. Especially true of thin (PCMCI
Electronics Forum | Wed Apr 13 15:21:25 EDT 2005 | mmjm_1099
Thats called technician syndrome (fine when your there and bad when you walk away). Is someone inspecting the board before reflow? If so make sure they don't touch it and run about 5 boards and see if it's consistent for placement. What type of pro