Electronics Forum | Fri Feb 27 15:48:13 EST 2004 | pdeuel
Dose anybody know of a method of preventing board sag in the wave process. We have a 2 year old Deltawave. The product we are running is a one sided 10in x 12in panel of 6 PCB's. Pin headers and connectors are near all of the edges. Our current board
Electronics Forum | Tue Oct 25 13:55:26 EDT 2005 | Joe Wesley
Looking for idea''s on how to reduce cracking of components along viscore. We are placing within 0.020 and0.030 from edge in some cases but are seeing cracks on components placed all the way out at 0.150 off edge. Has anyone heard heating the boards
Electronics Forum | Fri Aug 25 09:15:43 EDT 2006 | russ
We use a single large pad on board and reduce stencil aperture 50%. If you mask/reduce the thermal pad the solder will not wet out to edges and you will still see the part standoff with the open joints. the purpose of reduction is to wet the paste
Electronics Forum | Thu Jan 05 10:56:49 EST 2012 | davef
The high thermal mass of metal core boards makes them difficult to heat with hot air convection heating or IR. So, edge heaters are used for effective heating of heavy core circuit boards. Hakko and VJ Electronix offer edge heaters. We imagine othe
Electronics Forum | Tue Nov 28 11:58:58 EST 2017 | emeto
Hello all, I am about to design a panel and there are two connectors on the board that seem to be very close to the edge of the board. I am worried that they might interfere with the cutter blade. Can you tell me how close do you think a part should
Electronics Forum | Fri Jun 29 18:43:16 EDT 2001 | procon
Dear Danial, The only stupid thought is the one left only as a thought and not asked. The size of the board and the placement of the BGA on the board could play a big factor during reflow. If you are processing boards on an edge conveyor and the boa
Electronics Forum | Thu Apr 29 10:49:05 EDT 2004 | pjc
Yes, using an illuminated magnifing glass helps. How well your board fixuring is on the table will effect print alignment on other boards loaded. 0.5mm & 0.4mm will require very good fixuring, like you can get with tooling pins if the board has non-p
Electronics Forum | Fri Mar 16 10:04:41 EDT 2012 | davef
We'd repair a drop board like this. Here's what our old friend Jeff Ferry said is a published article ... When boards lose their edge: when the corner of a circuit board breaks or is damaged, the problem cannot be ignored by Jeff Ferry One of the m
Electronics Forum | Mon Apr 18 06:17:58 EDT 2016 | smtsparescn
If there are too many components on the board and many components are standing near the board edge,to use a depaneling machine is a simple way,but a machine is needed, another possible way is to design and make a simple fixture,it holds the board fi
Electronics Forum | Fri Dec 01 08:09:08 EST 2006 | CK the Flip
Square-leaded pin headers will typically bridge at the trailing edge (last couple of leads), since during peel-back, the solder at the trailing edge has "nowhere to go". If you have control over designs, ask your designers if they can put solder thi
