Electronics Forum | Mon Dec 23 16:46:29 EST 2002 | jonfox
If you are using a well maintained chip shooter, you should not see more than 1%-2%, and that is on the high side. Most pick and place machines (depending on what they utilize) with laser, vision, mechanical centering will most likely reject a diffe
Electronics Forum | Fri Dec 27 14:21:11 EST 2002 | MA/NY DDave
Hi DaveF, Thanks a Good to Great approach. I would still recommend getting another one, just in case. I am never too sure about how anyone follows procedures and maybe the start up just won't go well for some reason and you don't want to piddle a
Electronics Forum | Fri Dec 27 16:24:01 EST 2002 | Matt Foster
As a project I am trying to design a circuit that transmits data to the 9 pin serial port (RS232) of a standard PC. As a basic start I am trying to make a circuit with 4 ptm switches, when I press switch 1 I would like to display "switch 1" or some
Electronics Forum | Fri Jan 03 12:01:46 EST 2003 | jax
Alot of the companies out there use Standards developed internally, centered around there paste, equipment, and reflow processes. Normally you will see either 5mil or 6mil stencils used for everything in house with the exceptions of specific boards.(
Electronics Forum | Thu Jan 09 10:47:36 EST 2003 | Hussman
Depends on what you mean by shifting towards each other. Otherwise, 7 mil should be fine for 0603. I've used 6mil, 7mil and 8 mil without problems. Generally, stencil thickness won't have a bearing on "shifting" parts. Check placement. Make su
Electronics Forum | Fri Jan 17 04:07:12 EST 2003 | iman
A) Paste Printer : A1) identify the critical SMDs' pads. (choice should go to the BGA, CSP, MLF types...RES,CAP last in line...) A2) get a Paste measurement machine that measures readings of paste height (or better - volume) you are paste printing
Electronics Forum | Fri Jan 17 16:24:04 EST 2003 | MA/NY DDave
Hi I haven't seen the DEK software you describe in action or studied it, yet I will tell you to be careful of some of the software on the market even from good companies. Spend the time needed to understand how the software makes the calculations,
Electronics Forum | Fri Mar 07 20:52:51 EST 2003 | Neil
With any kind of statistical study you must have some limits to which you can measure against. The whole purpose of generating a CPK is to ensure that the equipment under observation can meet these limits when used under normal operating conditions.
Electronics Forum | Thu Jan 09 16:42:50 EST 2003 | russ
what are your grading criterias? All of these work pretty good but have differences in the "bells and whistles" I like the Air-Vac DRS24 (no exp. with the 22) because of the large under heater and thermo-couple control. but it is very slow and costl
Electronics Forum | Fri Jan 10 09:38:00 EST 2003 | pjc
Without knowing your boards and components its difficult to comment- beyond users of those mfgs. and models you mention commenting on performance, reliablity of the equipment and service & support from the mfg. As with any machine, its best to test d
