Electronics Forum | Tue Jun 17 10:14:36 EDT 2003 | sergiovito
Hello Everyone, I am assemblying a special Panel PCB, dimensions 330 x 250 mm with 8 single PCBs in it. After SMD reflow oven, the panel is bending and this is impacting in the next process - solder machine. some areas on the PCB aren't touched by t
Electronics Forum | Tue Jun 17 11:18:20 EDT 2003 | Claude_Couture
How are the 8 units distributed on the panel? 1 X 8, 2 X 4? Are there "V" groves scored in the panels to "break away" the units? Do you run on edge conveyor in the reflow oven? You need center support if you have 2X4 pattern with "V" grooves. Or us
Electronics Forum | Tue Oct 31 20:54:12 EST 2006 | Joseph
Dear all, Do you know any simple method to measure the bending strain on a PCB. I have heard of something like a special tape that changes colour when bent. This can be stick to a PCB to find the bending stress/strain but I cannot find anything on t
Electronics Forum | Mon Jan 24 20:46:07 EST 2022 | emeto
Hello, we have a stiff board that goes to HLA, where some force is applied over the board to make it fit in. This force creates some deflection/bending of the PCBA and in result we see some functional failures. I wonder if there is any standard that
Electronics Forum | Wed Nov 02 02:04:43 EDT 2022 | angela t
Bend it for mounting，if it can't be mounted by bending assembly. you can choose other pick and place machine which can handle this flex pcb. How long is this flex board? And do you use jigs when reflow? Could you please send a picture of the jig yo
Electronics Forum | Thu May 07 11:39:29 EDT 1998 | Dave F
| Is there a machine for bending S shaped bends in leads | of through-hole components, to keep them off the surface of the board. Ryan: Some lead forming equipment can form leads to stand-off the board. Some lead forming equipment suppliers are: Au
Electronics Forum | Wed Mar 20 13:18:26 EDT 2013 | kmots15
Is printing your concern or placement. I would say both: Printing: At 5 feet and on a flex you better have a really nice fixture to keep everything in check. You'll probably have to hand screen it unless your going to get a dedicated custom continu
Electronics Forum | Tue Jan 19 12:25:23 EST 1999 | Mike Cox
I need some opinions (And I know everybody has one). I am mounting a board into a case, after mounting the board I am loading it with stress in the middle causing it to bend around .030 inch. The board is 4" X 6" and is Bending in the 4" direction.
Electronics Forum | Sat Feb 02 09:48:27 EST 2002 | davef
We've talked about assembling on flex previously. Search the fine SMTnet Archives for background. Issues that come to mind [which is very risky, given that this Saturday morning and last night was at Jimbo's] are: * Use carriers that can flow thoug
Electronics Forum | Thu Jun 27 17:24:17 EDT 2002 | Daan Terstegge
Never did a DOE on that, but I think it would be quite difficult to warp a board inside the oven if it was flat when it entered the machine. If there's no center-board support then it's another story, then the board will bend due to it's own weight.
