Duet3D Logo Duet3D
    • Tags
    • Documentation
    • Order
    • Register
    • Login

    Trying to do a two pass z-probe homing. "Probe already triggered"?

    Scheduled Pinned Locked Moved
    Tuning and tweaking
    1
    2
    619
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • AnukWolfundefined
      AnukWolf
      last edited by

      Hey there!

      While my printer is working just fantastic,
      I found that the G30 Z-probe homing command can take ages to home,
      especially after a print when the bed is far away from the nozzle.

      So I tried to write a two pass homing script for the z-axis,
      where I first do a quick first pass with G1 S1 Z-160 F600, lift the nozzle a bit
      and then do the G30 pass. However, even though I lifted the nozzle 5, or even 10 millimeters,
      it always tells me that the "Z probe is already triggered at start of probing move".
      It's also interesting that the title of the error is "G28 Z" instead of "G30".

      Here's my complete homez.g script:

      ; homez.g
      ; called to home the Z axis
      ;
      G91 			; relative mode
      G1 Z4 F200 		; raise head 4mm to ensure it is above the Z probe trigger height
      G90 			; back to absolute mode
      G1 X100 Y100 F6000 	; put head over the centre of the bed, or wherever you want to probe
      G1 Z-160 S1 F600	; do quick first homing pass
      G1 Z10 F600		; lift up sensor a bit for second pass			
      G30 			; lower head, stop when probe triggered and set Z to trigger height
      
      G1 Z5 F600              ; lift Z relative to current position
      
      

      Printer: HyperCube CoreXY by Tech2C @Thingiverse
      Board: Duet Wifi 1.02, firmware v1.20

      1 Reply Last reply Reply Quote 0
      • AnukWolfundefined
        AnukWolf
        last edited by

        Hm, for some reason it seems to work now, even though I didn't change anything.
        I feel like perhaps the DWCs notification system is a bit bugged sometimes,
        but I keep you updated in case it comes up again

        Printer: HyperCube CoreXY by Tech2C @Thingiverse
        Board: Duet Wifi 1.02, firmware v1.20

        1 Reply Last reply Reply Quote 0
        • First post
          Last post
        Unless otherwise noted, all forum content is licensed under CC-BY-SA