Electronics Forum | Tue Mar 03 03:11:57 EST 2015 | vb7007
Hi I also forgot to mention, top side is reflowed first at SMT. Tenting vias is good option. we are looking into it. Can you please also suggest any solution to avoid solder balls at bottom side in other places than vias. Thanks
Electronics Forum | Fri Jul 24 16:37:47 EDT 2015 | cnotebaert
to my knowledge it will always be manual insertion,, if you mean reflow, not insertion, I always apply solder to one side, reflow, then apply tacky flux pre print to the already soldered pins, print op side, assemble part then send through placement
Electronics Forum | Wed Jan 27 13:36:51 EST 2016 | sarason
No, but it does evaporate slowly when left open. It is used in electronics cleaning because of it's solvent and evaporative qualities. You can look up references like the CRC handbook to compare these properties side by side to other alcohols that ca
Electronics Forum | Wed May 11 03:16:57 EDT 2016 | leeg
When running NPI's we used to use a Letraset Low Tack Double Sided Tape to place components onto the PCB to verify placement and to ensure that the program is correct. Letraset have stopped making the tape, what do others use?
Electronics Forum | Mon Aug 14 03:41:30 EDT 2017 | praveenmuthusamy
Dear ALL, what might be reasons for component drop during second side reflow soldering in PCB( OCCURS NOT FREQUENTLY- 100 BOARDS ONCE )?? your valuable comments are welcome!!!
Electronics Forum | Thu Dec 14 13:46:34 EST 2017 | emeto
Now, if before reflow everything looks fine, something happens in the oven. As it is second side, I would ask if there are parts close to edges or very tall parts on the first side that might be getting in contact with something in the oven? In my o
Electronics Forum | Fri Feb 09 09:19:40 EST 2018 | jmedernach
Consider offsetting the dimensions for at least one fiducial when applying them to the top and bottom side of a board. This helps to pokayoke the design by preventing an operator from accidentally loading the magazine or printer with the "wrong side
Electronics Forum | Tue Mar 20 03:46:53 EDT 2018 | reckless
Pin chains don't come on small ovens. I was thinking about buying some kind of pallet to put pcbs in but it may not be automated then? Most of my stuff is single sided but we do have three boards double sided.
Electronics Forum | Tue Jan 15 11:47:18 EST 2019 | emeto
Hi, I personally use my checkplot files to teach paste inspection machines. These should already be in the right view so you can treat them as individual top sides(no flip needed for both sides)
Electronics Forum | Fri Aug 16 12:57:17 EDT 2019 | emeto
To be in the range of profile for a paste, doesn't mean it is ideal. Check temperature on the Side A components while running side B profile.