Electronics Forum: diode and sc90 (Page 1 of 2)

SOD323 and SC90 bounceing parts in final PNP stages.

Electronics Forum | Sun Mar 04 01:56:37 EST 2012 | eadthem

What we have had recently is a lot of larger thin (32 thou) thickness boards that have had issues with SC90 diodes bouncing off the pads in the final PNP machine. Our setup, universal instruments GC120 or quad beam 30 spindle lightning heads. This m

SOD323 and SC90 bounceing parts in final PNP stages.

Electronics Forum | Sun Mar 04 07:48:50 EST 2012 | dilogic

Are you sure that the parts are bouncing? We had similar problem where diodes were placed very closely and occasionally nozzle pushed already placed part away (due to pick-up tolerance)...

SOD323 and SC90 bounceing parts in final PNP stages.

Electronics Forum | Sun Mar 04 09:53:00 EST 2012 | eadthem

What i have on the original 2 problem boards is the parts next to it are SOIC8 and placed using a 125F(.125" dia) 1 of witch is close and we have to Z zone it to place the SOIC last, the others have more than .02" clearance on all sides. The other

SOD323 and SC90 bounceing parts in final PNP stages.

Electronics Forum | Mon Mar 05 17:54:07 EST 2012 | swag

Three ideas for you: 1) Make sure nozzle tips are clean. 2) Check coplanarity of leads to bottom of body. If leads are above body, it could be the are not contacting paste well. 3) Investigate static charge in the parts caused by the feeder or

SOD323 and SC90 bounceing parts in final PNP stages.

Electronics Forum | Fri Mar 09 05:06:09 EST 2012 | grahamcooper22

Is your solder paste deposit drying out? Or if the paste deposit is small or there is insufficient paste then the tack between the device and paste will be poor so it can easily come out of the paste during its placement or placement of other parts.

SOT23s and paste + glue

Electronics Forum | Mon Dec 22 14:52:18 EST 2008 | wrongway

We run our process like that all the time paste then glue we use same profile as if we were just reflowing paste once in a while we have A plastic bodied part that has that problem we asume it was some mold relase still on the part basicly comtamena

difference between led and neon bulbs

Electronics Forum | Fri Aug 28 12:11:10 EDT 2015 | davef

LED: [Light-emitting diode] https://en.wikipedia.org/wiki/Light-emitting_diode Neon lamp: https://en.wikipedia.org/wiki/Neon_lamp

Cracking Capacitors and Solder Balls

Electronics Forum | Mon Jun 08 14:19:30 EDT 1998 | Gary Simbulan

Earl, et al, Boy things get old and cold around here fast. I promised more detail on my capactior problem and I thought I could drop something completely different in the same message and tell a tale of solder balls. First the caps. We still have

Counting cut tape and partial reels

Electronics Forum | Thu Mar 18 19:53:29 EDT 2021 | lhd_qa

Hello everyone. I am new to the forum so I am sorry if this has been asked before. Does anyone have any suggestions for counting partial reels and cut tape? We are a distributor and for our ecommerce PDC we keep having quantity issues. Currently, we

Re: Cracking Capacitors and Solder Balls

Electronics Forum | Tue Jun 16 15:01:58 EDT 1998 | Gary Simbulan

There are some common reason for capacitor cracking on my web page if you want to have a look. The document can be downloaded for your reference. Earl, et al, Boy things get old and cold around here fast. I promised more detail on my capactior

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