SOT-223 problems with LUNA EXP

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ktownsend
 
Posts: 1447
Joined: Thu Nov 05, 2009 2:18 am

Re: SOT-223 problems with LUNA EXP

Post by ktownsend »

I have an FV same as everyone else here (I think).

gsattler
 
Posts: 48
Joined: Tue Nov 24, 2009 3:44 pm

Re: SOT-223 problems with LUNA EXP

Post by gsattler »

Hey All, I think we finally prevailed in the battle to fix the bottom vision! In the end we enabled closed loop vision control like in the Adafruit wiki (again) and messed with the settings in the FconstXX.dat file in these locations:
K31 #3, #4 - X & Y offsets for 90° with Bottom Camera
K32 #3, #4 - X & Y offsets for 180° with Bottom Camera
K33 #3, #4 - X & Y offsets for 270° with Bottom Camera
K35 #3, #4 - X & Y offsets for 0° with Bottom Camera
K46 #3, #4 - X & Y offsets for 45° with Bottom Camera
K47 #3, #4 - X & Y offsets for 135° with Bottom Camera
K48 #3, #4 - X & Y offsets for 225° with Bottom Camera
K49 #3, #4 - X & Y offsets for 315° with Bottom Camera

The offset for all X's was the same, and the offset for all Y's was the same. Blogger, you might try a few test placements with some double sided tape and see if this fixes the problems you were having with your closed loop bottom vision setup. Before changing all the offsets we were getting really bad placement offsets and couldn't make heads or tails of how to fix it.

gsattler
 
Posts: 48
Joined: Tue Nov 24, 2009 3:44 pm

Re: SOT-223 problems with LUNA EXP

Post by gsattler »

The LV27 bottom vision camera offset entry box is key. It is just above the box where you change the "bad part" drop location in the MDC software. After you fix your FconstXX.dat file and fix the bottom camera offset then you are all ready to rock with the 7722FV. We just finished a board run of 200 with a pretty good mix of nasty MSOP, LQFP-100 and other small pitch stuff and it worked really well.

blogger
 
Posts: 43
Joined: Tue Nov 24, 2009 5:59 am

Re: SOT-223 problems with LUNA EXP

Post by blogger »

It wouldn't be too much trouble to have the machine work "very well" out of the box without dicking around with crappy software. Just finished a 100board assembly run and placing TQFP by hand for each was NOT EXCITING.

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