Electronics Forum | Tue Dec 09 10:58:12 EST 2014 | rgduval
I've always assembled those style connectors by hand. They require paste on both sides, correct? With that variable, I've never considered trying to do them with paste/reflow. Cheers, ..rob
Electronics Forum | Wed Dec 03 10:44:03 EST 2014 | kkay
We have a smt connector on side one of our pcb that overhangs through the board to the second side. We can't figure out how to print the second side with this part sticking out. Unfortunately we cannot run the second side first due to an LGA that has
Electronics Forum | Wed Dec 03 11:55:42 EST 2014 | spoiltforchoice
I think there are several answers: 1)Design Fail - slap whoever created it 2)Fit that connector as a manual process after the PCB is finished. 3)Print side 2 using a jet printer 4) Shield the fragile LGA and reflow it twice anyway. 5)Use a thicker PC
Electronics Forum | Tue May 04 10:59:23 EDT 2004 | Evtimov
Hi, It depends of your boards(are they for SMD or not) and how many boards you assemble. The process at all is like that: 1.Stencil printer - to adjust the paste 2. Pick and place machine(for your quantity) 3.Reflow oven Theese are the machines you
Electronics Forum | Tue Feb 02 22:57:32 EST 2021 | pnguyvu
Hello Charliem, Contact Steve Yen ( Steve@usastencils.com )at USA STENICLS INC. He'll give you better idea overprint or step . He has solid experience in design smt stencil. We've been receiving very good stencil from Steve.
Electronics Forum | Thu Jun 23 10:06:10 EDT 2011 | davef
Leave it to the Eurolanders to come-up with a goofy, confusing name for something simple. Stepped stencils are chemical etched or laser cut. IPC-7525 provides guidelines on designing stepped stencils. Look here http://www.ipc.org/TOC/IPC-7525.pdf
Electronics Forum | Fri Oct 14 14:09:19 EDT 2005 | bschreiber
Your problem is not the 0.4 pitch. Your problem is the manual cleaning. Manual cleaning will only remove the solder paste from the surface of the stencil. What's more, manual cleaning will force additional contamination into the 0.4 pitch apertures
Electronics Forum | Fri Oct 25 18:03:46 EDT 2002 | soupatech
Russ, that makes sense, thanks. As for the 20x20... I was speaking with a sales rep who was trying to talk me into buying stencils from him. I told him I use "Fuji 4000" and he sent me quotes for 20x20 and 29x29. That seems odd since the Fuji 4000 st
Electronics Forum | Thu Oct 20 11:52:07 EDT 2005 | Amol
there are various SMT machines 1. Stencil Printer 2. Pick and Place machine 3. Reflow ovens 4. Automatic optical Inspection machines start with visitng Stencil printer websites like MPM, DEK etc. Pick and Place -- Univesal instruments, Mydata, Fuji
Electronics Forum | Wed Nov 17 15:04:27 EST 2004 | russ
SMT assembly, First, you must utilize paste otherwise the parts will not stay put. Do you have any leaded devices such as QFPs or SOICs? Dispensing paste by hand is very difficult and time consuming for these types of parts. You can either dispense
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