Electronics Forum | Tue Dec 20 08:26:17 EST 2005 | geb
Thanks for the info. Yes the old camera was a 4mil rectangle, and the new one is a 1mil circle, 2 slots wider. The camera was calibrated on install, but they must have done something wrong, cos it doesn't realise it is 2 slots short. This screws up t
Electronics Forum | Tue May 02 18:13:44 EDT 2006 | jsloot
I have read through some archives on fiducials and see that there are a lot of people having problems with a .050 circle. One suggestion for a remedy was using a filter on the camera. Anybody else using this remedy? I would like to know more about th
Electronics Forum | Wed Feb 07 09:37:48 EST 2007 | billyd
Had the very same thing happen the first time we used the small QFNs. The aperture for the thermal pad in the center needs to be cut in a grid form, either squares (with around a 10 mil spacing between openings) or circles, like a BGA pattern. Too mu
Electronics Forum | Fri Jul 27 12:13:57 EDT 2007 | jdumont
We have issues with these also. They need to be flat to solder well. Reduce the square under the part for the heat sink and youll improve yields. That pad keeps the part lifted high while the other smaller joints reflow and partially attach. You can
Electronics Forum | Thu Dec 13 10:30:42 EST 2007 | slthomas
I would never have guessed that McM-Carr would carry that stuff (antistatic belts) but you learn something new every day....thanks! Question, though. Their online catalog says to order by the inch of circumference (OC, or outer circle), implying tha
Electronics Forum | Tue Apr 29 09:40:07 EDT 2008 | nitro
It may be a voltage issue. A very slight variance in voltage can cause this. I have seen it before with one of our machines. I think the 5vdc. was dropping out just a little bit. Turned out to be a bad muffin fan. Power supply was getting warm, 5vdc.
Electronics Forum | Fri Nov 08 10:06:24 EST 2013 | zrunkle_api
I have a small resistor pack that I need to place(EXB-N8V510JX). It has Concave terminals not sure how with any of our equipment how to make a terminal with a half circle cut into it. Any help would be great.
Electronics Forum | Sun Nov 10 05:40:27 EST 2019 | compit
It turned out that only SF heads support "fine" mode, while FNC does not. Probably because above the FNC nozzle there is a "circle" rotating the nozzles, and in fine mode it can interfere with the reflection of the camera light - the element is lower
Electronics Forum | Tue Dec 03 10:02:30 EST 2019 | dwl
This is a perfectly appropriate question for this forum. Looking at the pics, the solder joints look fine to me. can you circle the questionable joint? Maybe I'm just not seeing it. In general its fine to reflow a questionable solder joint to troub
Electronics Forum | Wed Apr 08 12:19:18 EDT 2020 | richardcargill
I'd have thought that centre search uses an algorithm to find the dead centre of a specified geometric shape. Pattern recognition basically has a picture of the area of the board selected and tries to match it with what the camera sees. ( so it doesn
