Auto-levelling on a CoreXY printer with a Duet controller
Posted by David J
|
Auto-levelling on a CoreXY printer with a Duet controller October 18, 2015 06:02AM |
The title says it all really - I have a Duet board that will soon be going into the CoreXY printer that I'm currently building. I have (hopefully) sorted the config, homing, pause and resume files, updated to the latest web page source, and will shortly be updating the firmware to 1.09k (now done! 
).
But, unfortunately, I have no idea how to implement auto-levelling... any guidance would be appreciated.
Edited 1 time(s). Last edit at 10/18/2015 06:52AM by David J.
).But, unfortunately, I have no idea how to implement auto-levelling... any guidance would be appreciated.
Edited 1 time(s). Last edit at 10/18/2015 06:52AM by David J.
|
Re: Auto-levelling on a CoreXY printer with a Duet controller October 18, 2015 11:15AM |
Ahh - I was wondering if it was along the same lines as for deltas. That's easy enough.
Thanks.
Thanks.
|
Re: Auto-levelling on a CoreXY printer with a Duet controller October 18, 2015 11:48AM |
For anyone planning to copy dc42's bit of code - there was a slight error in there - 2 lines were identical. 
Really easy to work it out, but just for the record I reckon it should be:
Note that I changed the comments just so they registered with my brain.
Not nit-picking, just want to help anyone else who may pick this up at a later date and not spot the deliberate error...
Edited 1 time(s). Last edit at 10/18/2015 11:49AM by David J.
Really easy to work it out, but just for the record I reckon it should be:
; Auto calibration routine M561 ; clear any existing bed transform G30 P0 X10 Y10 Z-99999 ; front left G30 P1 X190 Y10 Z-99999 ; front right G30 P2 X190 Y190 Z-99999 ; back right G30 P3 X10 Y190 Z-99999 ; back left G30 P4 X100 Y100 Z-99999 S0 ; centre, and calibrate
Note that I changed the comments just so they registered with my brain.
Not nit-picking, just want to help anyone else who may pick this up at a later date and not spot the deliberate error...
Edited 1 time(s). Last edit at 10/18/2015 11:49AM by David J.
|
Re: Auto-levelling on a CoreXY printer with a Duet controller October 18, 2015 12:49PM |
OK - I'll copy yours instead. (always ready to take advice... )
I'm not sure that the comments on each line match the actual positions though - but maybe that's just my brain post-Sunday-lunch.
Edited 1 time(s). Last edit at 10/18/2015 12:50PM by David J.
)I'm not sure that the comments on each line match the actual positions though - but maybe that's just my brain post-Sunday-lunch.
Edited 1 time(s). Last edit at 10/18/2015 12:50PM by David J.
|
Re: Auto-levelling on a CoreXY printer with a Duet controller November 15, 2015 10:57AM |
Ah - I thought it would be simple!
Many thanks...
Many thanks...
|
Re: Auto-levelling on a CoreXY printer with a Duet controller November 15, 2015 11:40AM |
...and that's working nicely.
One oddity though - it probes the right points on the bed, apart from the centre position - it should be X100 Y100, but instead it seems to be X100 Y80. If I send G1 X100 Y100 it does go the correct place on the bed.
Edited 1 time(s). Last edit at 11/15/2015 11:43AM by David J.
One oddity though - it probes the right points on the bed, apart from the centre position - it should be X100 Y100, but instead it seems to be X100 Y80. If I send G1 X100 Y100 it does go the correct place on the bed.
Edited 1 time(s). Last edit at 11/15/2015 11:43AM by David J.
|
Re: Auto-levelling on a CoreXY printer with a Duet controller November 15, 2015 04:01PM |
Quote
David J
...and that's working nicely.
One oddity though - it probes the right points on the bed, apart from the centre position - it should be X100 Y100, but instead it seems to be X100 Y80. If I send G1 X100 Y100 it does go the correct place on the bed.
That is odd. Are you certain that the bed.g file on the SD card is up to date with the one you posted?
Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod
Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
|
Re: Auto-levelling on a CoreXY printer with a Duet controller November 16, 2015 08:43AM |
That's sorted it - I now have the web interface I am used to.
David - I wasn't having a pop at you, I probably picked the files up from the wrong place.
I now have a new problem! When I first home X and Y the console stays clear, as expected. After running G32, when I subsequently home either axis I get the following error message (in this case, after homing X).
David - I wasn't having a pop at you, I probably picked the files up from the wrong place.
I now have a new problem! When I first home X and Y the console stays clear, as expected. After running G32, when I subsequently home either axis I get the following error message (in this case, after homing X).
G28 X Error: Triangle interpolation: point outside all triangles!I guess that I haven't configured something properly - any clues?
|
Re: Auto-levelling on a CoreXY printer with a Duet controller November 16, 2015 05:22PM |
Quote
David J
That's sorted it - I now have the web interface I am used to.
David - I wasn't having a pop at you, I probably picked the files up from the wrong place.
I now have a new problem! When I first home X and Y the console stays clear, as expected. After running G32, when I subsequently home either axis I get the following error message (in this case, after homing X).
G28 X Error: Triangle interpolation: point outside all triangles!I guess that I haven't configured something properly - any clues?
That's a known issue. It's been there ever since RepRapPro implemented the 5-point bed compensation. It's harmless enough, but one of these days I'll get around to fixing it.
Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod
Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
|
Re: Auto-levelling on a CoreXY printer with a Duet controller November 21, 2015 06:11AM |
Quote
dc42
I would like to get to the bottom of this, but I am tied up with other things at present. Feel free to remind me of this issue towards the end of the week.
Reminder, as you invited!
This doesn't seem to be a big issue, as the prints do seem to come out correctly - although I haven't yet done a print that covers the entire bed. Be nice to get it behaving properly though.
|
Re: Auto-levelling on a CoreXY printer with a Duet controller November 21, 2015 11:08AM |
I'll bear that in mind - but as this machine is new to me I'm still proceeding cautiously until I'm fully up to speed with the way it works. If a fault springs from that stuff I need to know that it's the code not the printer!
Though it's very likely that I will have a go...
Though it's very likely that I will have a go...
Sorry, only registered users may post in this forum.