Electronics Forum | Thu Mar 20 16:53:32 EDT 2008 | guhansub
Min spacing will be 0.75'' on all the 4 edges
Electronics Forum | Tue Mar 18 12:38:39 EDT 2008 | fsw
Hi! Can anyone tell me what is the min spacing between PCB edge & land pattern to avoid cracking of components due to mechanical stresses caused while depaneling with cookie/pizza cutter. Thnx!
Electronics Forum | Tue Mar 25 03:28:12 EDT 2008 | lococost
Thanks Steve, that's very clear!
Electronics Forum | Wed Mar 19 09:54:44 EDT 2008 | davef
Here's what we suggest: * Keep a 5-mm space between a board edge and a ceramic capacitor. * Mount the capacitor parallel relative to the edge. * Design pads about a half of the termination. * Fixture the board when using your pizza cutter.
Electronics Forum | Mon Mar 24 12:11:38 EDT 2008 | scombs
Is this what you are looking for? We do this on quite a few boards and it has eliminated component problems from the Cab depaneler (pizza cutter)
Electronics Forum | Thu Mar 20 10:59:59 EDT 2008 | fsw
Thnx Dave! I have not seen anyone as yet using fixtures to support brds while using Pizza cutters. Will check it out.
Electronics Forum | Fri Mar 21 08:28:35 EDT 2008 | lococost
Boardhouse, would it be possible to attach a picture of such a routed slot together with a V cut? I was always told the 2 don't work together that well because of tolerances.
Electronics Forum | Tue Apr 01 19:45:07 EDT 2008 | boardhouse
Dave, Sorry for the slow response, have been out of town, The spacing I was referring to was from board edge to copper features. This spacing is required to keep the router and score blades from exposing or hitting the Copper. Regarding the slot I
Electronics Forum | Thu Mar 20 23:01:40 EDT 2008 | davef
Boardhouse: Not to be confruntational, just trying to better understand what you're telling us. When you say, "Standard spacing most board houses would like to see is" blablabla. * What are the units of these dimensions? * You'd like to see these dim
Electronics Forum | Wed Apr 09 14:50:03 EDT 2008 | bradlanger
We use a FKN pizza cutter and found that even with 5mm clearance and the proper orientation of the part larger ceramic capacitors 1812, 1210 would still stress fracture. We have successfully fixed stress fracture problems by adding routed relief slot
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