Duet has stopped talking completely (moved from another thread) August 18, 2015 11:59AM |
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Re: Duet has stopped talking completely (moved from another thread) August 18, 2015 12:09PM |
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Re: Duet has stopped talking completely (moved from another thread) August 18, 2015 02:41PM |
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Re: Duet has stopped talking completely (moved from another thread) August 18, 2015 04:41PM |
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Re: Duet has stopped talking completely (moved from another thread) August 18, 2015 11:07PM |
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Re: Duet has stopped talking completely (moved from another thread) August 19, 2015 01:10AM |
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Re: Duet has stopped talking completely (moved from another thread) August 19, 2015 04:28AM |
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Re: Duet has stopped talking completely (moved from another thread) August 19, 2015 05:17AM |
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Re: Duet has stopped talking completely (moved from another thread) August 19, 2015 06:20AM |
Registered: 9 years ago Posts: 280 |
To calibrate the sensor for Z homing and bed probing, home X and Y, then position the head over the centre of the bed. With the nozzle at operating temperature, lower the head so that it is just touching the bed or just gripping a sheet of paper, then send G92 Z0 to define that position as Z=0. Remove the paper and raise the head in small steps until the LED illuminates, and continue raising the head until it goes out again. Now lower the head in 0.05mm steps until the LED illiminates again. Read off the Z height and use that value in your G31 command in config.g.When the height is set to 240 (in my case), then the probe can't be manually jogged down to the surface to measure the Z offset. So I set m666 h250, which goes below the bed a little.
Re: Duet has stopped talking completely (moved from another thread) August 19, 2015 10:03AM |
Registered: 10 years ago Posts: 14,672 |
Quote
shadowphile
ok, probe is working ok now.
As for the probe calibration process, I notice what seems to be a missing note:
To calibrate the sensor for Z homing and bed probing, home X and Y, then position the head over the centre of the bed. With the nozzle at operating temperature, lower the head so that it is just touching the bed or just gripping a sheet of paper, then send G92 Z0 to define that position as Z=0. Remove the paper and raise the head in small steps until the LED illuminates, and continue raising the head until it goes out again. Now lower the head in 0.05mm steps until the LED illiminates again. Read off the Z height and use that value in your G31 command in config.g.When the height is set to 240 (in my case), then the probe can't be manually jogged down to the surface to measure the Z offset. So I set m666 h250, which goes below the bed a little.
But when I re-home then run G30 P0 X0 Y0 Z-99999, the head presses right down on the glass before the probe can do anything. So I then reset m666 to h240; THEN I can run the the G30 command with the expected behavior.
Does this make sense?
thanks
Re: Duet has stopped talking completely (moved from another thread) August 19, 2015 05:17PM |
Registered: 9 years ago Posts: 280 |
Re: Duet has stopped talking completely (moved from another thread) August 19, 2015 05:21PM |
Registered: 9 years ago Posts: 280 |
Re: Duet has stopped talking completely (moved from another thread) August 19, 2015 05:43PM |
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Re: Duet has stopped talking completely (moved from another thread) August 19, 2015 06:15PM |
Registered: 10 years ago Posts: 14,672 |
Quote
shadowphile
ok, I am adjusting for tilt now with the H parameter. I see a real-world usage headache though:
Unfortunately, I need a coat of PVA which causes unpredicable changes in the IR reflection. Meaning I have to scrape the bed clean before every auto-level. Cleaning off PVA is a difficult scraping job even wih a razor blade so I leave it on and touch up after every print. If I auto-level each day for the first print then I need to go through the scrape-off process every day. Am I in tune with reality here?
thanks
Re: Duet has stopped talking completely (moved from another thread) August 21, 2015 06:43PM |
Registered: 9 years ago Posts: 280 |
Re: Duet has stopped talking completely (moved from another thread) August 22, 2015 07:00PM |
Registered: 9 years ago Posts: 280 |