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    Homing Z axis - wrong direction :(

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    • jaysson_ch
      jaysson_ch last edited by jaysson_ch

      hi guys 🙂
      i would appreciate if you could please help me with a minor problem
      on my corexy printer - while homing the bed it keeps going down instead of going up.
      when i press the +5 Jog button it goes up and for -5 the bed goes down (is it ok?)
      right now i am tring to setup my bl-touch sensor and when i try to use G30 command
      the bed goes down instead of up. also when i try home Z and home all - the also bed goes down.
      btw, at the reprap configuratore chose for z axis backward is it ok?

      ; Drives
      M569 P0 S1                                         ; Drive 0 goes forwards
      M569 P1 S1                                         ; Drive 1 goes forwards
      M569 P2 S0                                         ; Drive 2 goes backwards
      M569 P3 S0                                         ; Drive 3 goes backwards!
      
      ; homez.g
      ; called to home the Z axis
      G91                 ; relative positioning
      G1 Z5 F6000 S2      ; lift Z relative to current position
      G90                 ; absolute positioning
      G1 X-13.5 Y20 F6000 ; go to first probe point
      G30                 ; home Z by probing the bed
      
      ; Uncomment the following lines to lift Z after probing
      ;G91                ; relative positioning
      ;G1 S2 Z5 F100      ; lift Z relative to current position
      ;G90                ; absolute positioning
      
      deckingman 1 Reply Last reply Reply Quote 0
      • deckingman
        deckingman @jaysson_ch last edited by

        @jaysson_ch The simple thing to try is to reverse the motor direction. Assuming P0 is X, P1 is Y and P2 is Z, change P2 from S0 to S1.

        The cofigurator can only make a guess as to which way a motor turns and which direction means up or down.

        Ian
        https://somei3deas.wordpress.com/
        https://www.youtube.com/c/deckingman/

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        • BLV
          BLV last edited by

          I am also pretty sure you need to reverse z motor

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          • T3P3Tony
            T3P3Tony administrators last edited by

            @jaysson_ch Also its important to remember that +5 should make the bed move away from the nozzle, increasing the Z distance by 5mm. Similarly a -5 jog should make it move towards the nozzle. So if you have a setup where the Z axis moves the bed, not the gantry with the XY motion system on it +5 should make the bed move down by 5mm.

            Duet Hardware Designer
            www.duet3d.com

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