Electronics Forum: rework (Page 186 of 293)

In need of SMT-Maestro install files

Electronics Forum | Fri Jan 11 05:27:10 EST 2019 | spoiltforchoice

Weirdly, while I had a copy I had never made use of that feature, I used to use it to find locations for manual placement or rework. In fact I wrote my own tool to do BOM Merging, what would be excellent would be if the original creator of SMT-Maestr

PCB defects

Electronics Forum | Thu Dec 14 14:29:53 EST 2017 | barryg

We did check for oven clearance thinking the same , but there is plenty clearance. We have however found that the problem was on several lots of PCBs. We ran a fresh lot and problem went away. There appears to be some kind of contamination on the PCb

Nordic aQFN73 stencil design

Electronics Forum | Tue Apr 10 08:37:36 EDT 2018 | davef

Hi Steve ... I found nothing in the manufacturers "paper" to help. Comments are: * I agree. No blobs. Solder on the thermal pad should me minimized. Too much solder will float the component. Old timers used to talk about 50-80% coverage. * If you'

Solder Ball Dispersion Test (String Solder)

Electronics Forum | Thu May 03 12:59:55 EDT 2018 | donnie15

Our customer is asking for a solder ball dispersion test on our string solder for rework. The do not provide a test spec, only the attached diagram? has anyone seen this before? It looks like just pushing the solder against the iron and counting th

Rework Station for Large PCBs

Electronics Forum | Tue Jul 24 03:30:53 EDT 2018 | lraymond

Please take a look at the model DEN-ON RD500V series machine , it can handle 700 x500 mm (28" x 20 ") and can also be customized for larger PCB. The company is quite reliable (55 years old) and makes very strong equipment. http://denondic.co.jp/en/

Rework Station for Large PCBs

Electronics Forum | Tue Jul 24 20:07:31 EDT 2018 | lraymond

24") The RD500V has three heaters and it uses a combination of hot gas and IR. The area heater can range from 3600 watts to 4800 watts with a bottom localized heater that is 1 000 watts which has adjustable z movement. The price of the RD500V series

Reflow soldering issue

Electronics Forum | Thu Aug 30 15:37:04 EDT 2018 | davef

What if you were this guy [PeteC] and you knew this batch of boards had some goofball issue that messed with product quality, increased rework and all that AND you still had to run them? I've had to eat from the pie before. I'll bet you have also.

QFN Rework Issues

Electronics Forum | Wed Feb 13 13:44:03 EST 2019 | SMTA-Joe

I actually have a quote for the larger TF2800 from the rep that came to do the demo on the smaller model. There was talk of us sending hardware to PACE for them to see if they could get the larger model to work for us, but the decision was made not

QFN Rework Issues

Electronics Forum | Wed Feb 13 16:38:56 EST 2019 | spitkis2

BTW - in our testing on housings with Sn42Bi57 paste, it took 240 seconds to reach 140C on an aluminum module with a mass of 0.75 lbs. This was from ambient and only using machine preheating before having the top heater turn on to peak at 162C. Sa

QFN Rework Issues

Electronics Forum | Wed Feb 13 20:27:02 EST 2019 | SMTA-Chris

We’ve done similar projects. FR-811 with camera system for alignment. More cost effective than split vision. Bottom heat uses solid surface for contact heating similar to heating microwave module chassis. Our rep can arrange a demo if you haven’t


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