Electronics Forum | Mon Jul 21 06:18:15 EDT 2014 | digar
We had this. The anti-backlash nuts were binding. > We took them apart, chased the threads with a tap > and re-assembled with slightly less pre-load. > Hasn't been a problem since. > We had this. The anti-backlash nuts were binding. > We took t
Electronics Forum | Thu Jul 07 11:52:25 EDT 2016 | proceng1
We just pulled a Speedline Accuflex printer out of storage. After programming a board and stencil, and calibrating the fiducials and everything, we do a test alignment and bring the board to print height. It is off. I've done it now with two diffe
Electronics Forum | Wed Dec 04 12:42:04 EST 2019 | dunks
We currently use Kester's ep256 as well and it seems to be a bit more grainy than one would expect from lead, especially if the temperature is too low. That paste says it's specialty is being robust over a wide range of profiles and stencil conditio
Electronics Forum | Tue Nov 08 22:49:41 EST 2022 | jojoled
Hi, I need help with placing 0402 resistors 90% of them are picked correctly, but are not placed(thrown away) giving me error : LASER retry over. Slightly higher varistors in same package have slightly better placing rate, about 50%, but still not su
Electronics Forum | Tue Nov 14 23:49:37 EST 2000 | DL
Our land patterns are slightly bigger than the part, we've had no problems. There are your own concerns about the part hanging over the pads, this can be ok or not depending on your application and/or how much part is over. I'm sure this is in the J-
Electronics Forum | Fri Jun 23 08:52:16 EDT 2000 | Dave F
John: Seek your answers in the archives. As I recall someone said: � Biggest cause of BGA shorting was out-gassing in-package moisture. � Removing shorts w/o removing the device: - Preheat the board - Lower the nozzle and heat the device - Lift the
Electronics Forum | Thu Mar 15 21:29:06 EST 2001 | davef
That you can solder the test points with a little extra flux and a good blast of heat makes me think there is nothing fundamentally wrong. I'd guess there is oxidation on some test points that is a little crustier than others. You might be able t
Electronics Forum | Tue Jan 25 17:01:42 EST 2000 | Robert Steltman
Dave Thanks - have changed to a slightly larger one and it has helped quite a bit, but I feel it is still not perfect. I think I am going to write this one off to a pachaging problem on this one particular device. It is a new machine (2 weeks old) w
Electronics Forum | Mon Oct 11 12:44:37 EDT 1999 | Mike Demos
In a cost-reduction effort, our Design group is attempting to eliminate silk-screen (legend ink) on some new products. By the elimination of this process, there will be a slight decrease in the cost of the bare board. Presently, the silk screen den
Electronics Forum | Mon Jan 25 13:51:07 EST 1999 | Parvez PAtel
Steve i agree with u. we use kapton tapes for test puproses at our facility and they do not interfere with the printing results. Infact we sometimes use it to mask off unwanted apertures on stencil underside. But could their applcation affect the gol
