Electronics Forum | Wed Nov 07 21:16:44 EST 2001 | davef
Consider using the following hierarchy of rules for pad design: 1. If you have a land pattern in a manufacturer�s data sheet, use it. 2. If the data sheet doesn't have a land pattern, but does have an RLP (registered land pattern) number or JEDEC n
Electronics Forum | Thu Feb 09 20:12:51 EST 2017 | imarkl
Any advise about dewetting defect occurrence during 2nd pass reflow. Commonality on affected PCB having water marks near affected pad(s). Elemental composition found on affected pads without solder paste are Silicon and Sulfur. As well as in pad with
Electronics Forum | Tue Dec 23 14:45:06 EST 2008 | comatose
One thing that helps is to divide large pads into a series of smaller pads. This prevents the scooping you're talking about.
Electronics Forum | Tue Dec 04 13:23:05 EST 2001 | fmonette
Hi Steve, It sounds like your product will have many moisture-sensitive devices on both sides. You should be aware of the additional controls that are required to insure the reliability of these components in a double-side reflow application. The
Electronics Forum | Tue Dec 23 15:06:25 EST 2008 | evtimov
It depends how manual is the printer. you need to control pressure and speed. If you control both by hand, it is difficult to discuss results. If the pressure is controlled by the printer, than you should be able to do it by one deposit. Also is the
Electronics Forum | Wed Dec 24 20:11:43 EST 2008 | xianhua_tang
hi,brettc! Our stencil openings no more than 4mm * 4mm, you have a larger component of the pads is more than a 4*4? At the same time, with the thickness of the stencil, I would like to increase the printing speed can be improved to reduce the thickne
Electronics Forum | Wed Nov 27 13:07:07 EST 2013 | processman
Hi, Can somebody confirm the correct operation of the rear clamp rails on an Ersa Ecoselect 2.... Do they only activate when the PCB comes into the machine then release, or stay activated thru out the flusing, heating, soldering etc
Electronics Forum | Wed Jun 16 15:31:47 EDT 1999 | JERRY JOHNSON
WOULD LIKE TO DO RELOW OF 2 SIDED SMT BOARDS. USUALLY THE BOTTOM SIDE HAS RESISTORS AND CAPS ONLY. WHEN THE BOTTOM OF THE BOARD HEATS UP, THE PARTS ARE FREE TO MOVE AND ONLY SURFACE TENSION WILL KEEP THE COMPONENT FROM FALLING OFF. CAN BOARDS BE RUN
Electronics Forum | Sat Dec 01 09:09:24 EST 2001 | davef
Sounds like a perfect place to start. Sure we all have different perceptions of fun, don't we? Trial by fire, eh? ;-) A prediction: Your cost accountants are going to freak when they compare the production costs for this board to the more famili
Electronics Forum | Thu Dec 12 12:44:45 EST 2013 | jaimebc
Just to add to Chad's response, there is box that you need to check in the program editor, ours is under the colum soldering unit one, click on the icon at the bottom, you should now be able to see a box " fix horizontal permanently". Check this box
