Electronics Forum | Wed Nov 01 00:19:29 EST 2006 | Cingular Man
Are you setting up double side PCB that has the tall components on the bottom that being push up by the support pins... ??? Or because your vacuum is leak and not holding the board at the same spot every time you are loading the board.... Board warp
Electronics Forum | Tue Oct 30 18:43:31 EST 2001 | mparker
My first thought is board warp. This is something you can't see when the board is in a reflow oven. I see it occasionally going through wave solder. You may need a pallet with hold down clamps for reflow. Try putting a bare board in a baking oven at
Electronics Forum | Sat Apr 14 03:25:04 EDT 2001 | kpliew
Hi , As far as I experienced with wave reflow. If u have a refective thermal reader , u will see that the board is exposed to much more temp than the 120 deg that u set. Actually , once u see the board warp or comp. crack u should know that
Electronics Forum | Sat Apr 14 03:25:10 EDT 2001 | kpliew
Hi , As far as I experienced with wave reflow. If u have a refective thermal reader , u will see that the board is exposed to much more temp than the 120 deg that u set. Actually , once u see the board warp or comp. crack u should know that
Electronics Forum | Thu Aug 03 10:13:41 EDT 2006 | wrongway
Hello Rush fan we have a Ekra E5 had it about a year the only thing I dont like is the foil on top of the doard holders you can take them off but if your board is warped then it dosnt clamp the board and it will fail the vision but we hav
Electronics Forum | Fri Sep 22 14:07:29 EDT 2006 | realchunks
I think Sr is right. Miss prints are prolly a result of your tooling moving the board after the camera looks at the fids. It also could be the camera itself hitting the board from warpped board or tooling raising the board up. It may be the camera
Electronics Forum | Tue Sep 05 16:26:53 EDT 2006 | Bill
Thinking about this auto-mode on Grid-Lok..... Ok, the board is warped, lets say positively, the pins conform to the warped board... what about the effect on top side and squeegee pressure? It will be much higher and could damage stencils, right? Pos
Electronics Forum | Mon Oct 31 19:37:16 EDT 2022 | emeto
Just because you can't add copper to the board, doesn't mean you can't add copper to the panel. Redesign panel, where board house can add copper to the panel to balance the board a little better. I would advise against low melting solder alloys on cu
Electronics Forum | Thu Dec 18 23:44:53 EST 2003 | Dean
...don't expect high yields with hasl on that device. Yeah, you an do it. But not reliably. Also, factor in board warp, bump tolerance AND HASL variation....recipe for disaster. can your process toleate a selective gold on the one device? How ab
Electronics Forum | Thu Apr 14 13:53:39 EDT 2005 | jdengler
The board warp is a good place to look. Also: -Are you pre-rotating? -Are you using the largest nozzle possible? Most of the time this ends up being a component slip on the nozzle caused when the part is rotated if not doing pre-rotate, or slippa
