3 Z steppers - can I move it individually?
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@fcwilt Hi! Thank you!
Will try and implement ASAP - busy struggling with something else now again -
Will the homing script basically remain the same, or is there something specific I need to do?
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@reefwarrior said in 3 Z steppers - can I move it individually?:
Will the homing script basically remain the same, or is there something specific I need to do?
You home normally - the same as you would if you only had one Z stepper.
When you have the M574 command with multiple endstops for Z the firmware knows how to handle them.
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@fcwilt Hi. I have now installed optical end stops; but I'm having issues with it - it only recognises a single optical end stop - and even if I trigger it; the z motor on that rail does not stop. Also; I have a BL Touch for bed probing - how do I define that; inclusive of the other 3 independent optical end stop....
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@reefwarrior said in 3 Z steppers - can I move it individually?:
@fcwilt Hi. I have now installed optical end stops; but I'm having issues with it - it only recognises a single optical end stop - and even if I trigger it; the z motor on that rail does not stop. Also; I have a BL Touch for bed probing - how do I define that; inclusive of the other 3 independent optical end stop....
You need to have an M574 command something like this (from my printer) ...
M574 Z1 S1 P"!duex.e2stop + !duex.e3stop + !duex.e4stop"*
... where you specify each endstop in the order the matches the Z stepper assignments in the M584 command (from my printer)
M584 X0 Y1:2 Z5:6:7 E3
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@fcwilt Hi; I will try again - but how do I now define the BL Touch; and as what?
I have this: M584 Z7 U5 V9 P3 --- the 3 Z motors are plugged in on 2 4 and 6. And They work in the order of 4 2 6 on the duex.
If I issue a M119; it tells me that there is no end stop for U and V....
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@reefwarrior said in 3 Z steppers - can I move it individually?:
@fcwilt Hi; I will try again - but how do I now define the BL Touch; and as what?
I have this: M584 Z7 U5 V9 P3 --- the 3 Z motors are plugged in on 2 4 and 6. And They work in the order of 4 2 6 on the duex.
If I issue a M119; it tells me that there is no end stop for U and V....
I do not understand your M584.
If the Z steppers are on 2,4,6 then the M584 should have Z2:4:6.
Why are you concerned with moving each Z stepper individually?
Frederick
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@fcwilt Hi; ok that was for maintenance purposes (cleaning and lubrication) to have each individual axis be able to move up and down.
It is 5 7 and 9; as drivers 0-4 are on the Duet2 Wifi; and then the Duex5 is 5-9 (I have used the first stepper plug; then left one open, used the next, one open, used next on the duex5).
According to documentation on the duet wiki; I need to 'split' the 3 motors; each must run to the end stop, and then need to be 'recombined' in the homez.g
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@reefwarrior said in 3 Z steppers - can I move it individually?:
@fcwilt Hi; ok that was for maintenance purposes (cleaning and lubrication) to have each individual axis be able to move up and down.
It is 5 7 and 9; as drivers 0-4 are on the Duet2 Wifi; and then the Duex5 is 5-9 (I have used the first stepper plug; then left one open, used the next, one open, used next on the duex5).
According to documentation on the duet wiki; I need to 'split' the 3 motors; each must run to the end stop, and then need to be 'recombined' in the homez.g
If you keep the steppers combined Z5:7:9 with firmware 3.2.2 or later you can home the Z axis and each motor will run until the associated endstop is triggered.
I don't understand why you would need control each Z stepper individually for the purposes of cleaning/lubrication. I have not found the need to do that.
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See here for some examples: https://duet3d.dozuki.com/Wiki/Bed_levelling_using_multiple_independent_Z_motors
You can use both ways interchangeably. Combine all 3 drivers as a single Z axis and use the combined M574 endstop definition to home them at once as a group. Or if you wish you can have a separate macro that creates separate axis for each Z motor for individual control and movement.
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@phaedrux Thank you! Question still is how do I go about with the following:
3 independent Z motors - each homing to an end stop (to get a rough levelling) and then using the BL touch to adjust each axis as required (homing using 3 z axis). I have had a couple of times now where there was some or other issue with regards to the BL Touch and I ended up smashing the bed into the nozzle....
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Think I may be on the point of having this completed. The individual homing works - just now the bl touch part...
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@reefwarrior said in 3 Z steppers - can I move it individually?:
3 independent Z motors - each homing to an end stop (to get a rough levelling)
This part is automatic if you're using RRF3 and have the 3 z motor drivers combined as a single z axis and then home using the 3 endstops combined in M574. Using a G1 H1 move to home Z will move each motor until the endstop is hit.
For doing independent leveling with the probe, you'll need to set that up in bed.g.
All this and more is described with examples here: https://duet3d.dozuki.com/Wiki/Bed_levelling_using_multiple_independent_Z_motors
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@phaedrux Cool!
I suspected that it may be in a different file - seems I am finally grasping how this part works -
undefined Jrow referenced this topic
