Electronics Forum: ups (Page 251 of 1179)

Jetprint solder on PCB boards

Electronics Forum | Fri May 28 03:55:38 EDT 2010 | sibbe

also think of the space u can save by getting rid of the stencils and reduction in set-up time (no more stencil/blade cleening, just load the file)

ceramic cap crack

Electronics Forum | Mon Jun 21 02:15:03 EDT 2010 | ppcbs

We also encountered the crack case in multi layer Ceramic Cap,0603 after touch up. Most failure were on the terminals. Previously, we used 0805 instead 0603.that time, failure were very few.

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

preheat slope vs ramp up- what is different?

Electronics Forum | Fri Jul 09 07:14:36 EDT 2010 | cobar

http://www.shanelo.co.za/reflow_profile_adjustment.htm http://www.shanelo.co.za/how_to_profile_a_pcb.htm http://www.shanelo.co.za/SMD%20Assist.htm

preheat slope vs ramp up- what is different?

Electronics Forum | Mon Jul 12 05:01:30 EDT 2010 | cobar

Please follow the paste suppliers specs for the paste as an indicator.Most people think that if they follow the paste suppliers recommendations to the T it will be a perfect profile but this is not the case.Play around with preheat settings but follo

pick and place for 01005 components

Electronics Forum | Thu Jul 15 15:16:26 EDT 2010 | leemeyer

I am looking into pick and place machines that are spec'd to place 01005 components. Does anyone know of a inexpensive make(50 - 75K $ new) that can place these parts. So far all that I have found are 150K and up. Thanks

PCB Warp Issues

Electronics Forum | Tue Jul 20 16:02:12 EDT 2010 | mikesewell

You may want to look at IPC 7721 Method 3.2 Bow and Twist Repair. In extreme cases you may need clamp or weight the pcb with bow in the other direction to yield a "flat" pcb in the unrestrained state. You will have to take the PCB up to or slightly

Select coat fixture material for gasketing

Electronics Forum | Thu Jul 29 08:00:34 EDT 2010 | markhoch

Does anyone know of a good gasketing material that will hold up over time in a select coat fixture?

MPM UP2000 Squeegee Problem

Electronics Forum | Mon Aug 02 11:16:02 EDT 2010 | dman97

Thanks for the answers guys. I knew it had something to do with the calibration menus. It had just been so long since I had to do maintenance to an MPM printer. I had been working with DEKs and Ekras for the past 6 years.


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SMT feeders

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Equipment Auction - Eagle Comtronics: Low-Use Electronic Assembly & Machining Facility 2019 Europlacer iineo + Placement Machine  Test & Inspection: Agilent | Tektronix | Mantis Machine Shop: Haas VF3 | Haas SL-20 | Mult. Lathes

Software programs for SMT placement and AOI Inspection machines from CAD or Gerber.