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ATC Project - Debug phase
- tatel
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4 years 1 month ago #251233
by tatel
Replied by tatel on topic ATC Project - Debug phase
Sorry by the late response, have been quite busy...
Yes, I was responding to thuis thread. I'm under the impression that a) you got quite a bunch of problems having linuxcnc working, trying different distros, etc, and b) That there are other ATCs working but they are using encoder output while your project uses Hall sensors.
Am I wrong? If so, I beg your pardon...
Yes, I was responding to thuis thread. I'm under the impression that a) you got quite a bunch of problems having linuxcnc working, trying different distros, etc, and b) That there are other ATCs working but they are using encoder output while your project uses Hall sensors.
Am I wrong? If so, I beg your pardon...
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- spumco
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4 years 1 month ago #251260
by spumco
Replied by spumco on topic ATC Project - Debug phase
Yes, you're observation about my struggling with distros and linux in general is spot on. I think I've got a stable setup now, but the past year has been painful. A non-computer guy with a little Windows experience trying to get LCNC running right in the middle of the Python2/Python3 mess...with a GUI that's somewhat experimental... I might not have timed things very well.
Regarding the ATC, it appears to be all set now. I still haven't had time to run a physical tool change test, but all the motion appears to be sorted out. My setup uses a closed-loop stepper (encoder to drive, not LCNC) and a 5:1 gearbox driven by a 7i76ED.
Carousel.comp is controlling the ATC disc rotation, and it's set to 'counts' mode (i.e. step & direction). There's a single home pin triggering an inductive proximity sensor. No hall sensors, no disc encoder - just a single home pin.
Once enabled, carousel.comp searches for the home pin and sets that location as pocket #1. After that, carousel figures out the distance/steps to a particular pocket and also does the shortest-path calcs. If the stepper loses steps it'll alarm and shut everything down so I'm not worried about pocket feedback.
The recently updated carousel.comp also has a feature for slow-searching to a pocket pin. This feature was working for normal pocket commands, but jogging one pocket position would wind up missing the pin in one direction (but not the other). I realized I didn't need this pin-search safety feature and disabled it.
I just got all the brackets and mounts back from the powder-coater and have it reassembled & rough aligned. I'm still planning on writing up something a bit more detailed than my typical forum ramblings over the past months, but I'd rather wait until it's actually proven to work.
Regarding the ATC, it appears to be all set now. I still haven't had time to run a physical tool change test, but all the motion appears to be sorted out. My setup uses a closed-loop stepper (encoder to drive, not LCNC) and a 5:1 gearbox driven by a 7i76ED.
Carousel.comp is controlling the ATC disc rotation, and it's set to 'counts' mode (i.e. step & direction). There's a single home pin triggering an inductive proximity sensor. No hall sensors, no disc encoder - just a single home pin.
Once enabled, carousel.comp searches for the home pin and sets that location as pocket #1. After that, carousel figures out the distance/steps to a particular pocket and also does the shortest-path calcs. If the stepper loses steps it'll alarm and shut everything down so I'm not worried about pocket feedback.
The recently updated carousel.comp also has a feature for slow-searching to a pocket pin. This feature was working for normal pocket commands, but jogging one pocket position would wind up missing the pin in one direction (but not the other). I realized I didn't need this pin-search safety feature and disabled it.
I just got all the brackets and mounts back from the powder-coater and have it reassembled & rough aligned. I'm still planning on writing up something a bit more detailed than my typical forum ramblings over the past months, but I'd rather wait until it's actually proven to work.
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