78890 electron results

Electronics Forum: electron (Page 2921 of 7889)

quad qsp

Electronics Forum | Wed Jun 30 21:27:15 EDT 2010 | comprep

I need some info on a xp upgrade for a quad qsp2 dose it have aney binifit over win 98.

Reflow Incoming Chilled Water Temp

Electronics Forum | Thu Jul 01 00:03:31 EDT 2010 | saukat

Hi.. I am optimizing the reflow oven temperature setting, Interested to know the ideal incoming chiller water temp. My machine is running lead-free process with the incoming chiller water at 12 degree C. Regards,

Fiducials

Electronics Forum | Fri Jul 02 04:06:20 EDT 2010 | dan_ems

That depends what SMT machines you have. We use the same fiducial mark like in this standard and works fine every time.

Fiducials

Electronics Forum | Mon Jul 05 22:21:33 EDT 2010 | isd_jwendell

I have found that lighting for the cam is very important for fiducial recognition. My machine illuminates with a light ring, which isn't so good. However, if I burnish the fiducial with a small fiberglass brush then it works every time.

Fiducials

Electronics Forum | Tue Jul 06 11:58:44 EDT 2010 | baildl632

What type of finish are the PCB's? HASL, tin immersion, silver immersion,........we've seen all the above problems with HASL finished boards. Usually either reheating w/ a soldering iron or "burnishing" with a scotch brite pad has worked for us.

Fiducials

Electronics Forum | Thu Jul 08 23:46:21 EDT 2010 | rdoss

I have this same problems on the flex i use, most of which has an ENIG or immersion silver finish. About the only thing I know to do is have your supplier package it in a vaccume seeled bag to keep it from oxidizing. Otherwise you end up having to

Quad feeders

Electronics Forum | Thu Jul 01 15:26:22 EDT 2010 | bobpan

The feeders have plastic gears inside that get worn out after the years. Some feeders are better than others. Sometimes the gears inside loosen up and need tightend. The older the feeder the worse the drift usually is. Good luck