Attempt to move the head of a Delta or SCARA printer before homing the



  • 10:30:47 PM
    Attempt to move the head of a Delta or SCARA printer before homing the towers
    10:30:43 PM
    G28
    Attempt to move the head of a Delta or SCARA printer before homing the towers

    new firmware and DWC installed and calibrations done, However this keep coming up every time I home the printer, even if it was just homed. I don't remember this coming up before, am I mistaken?


  • administrators

    This usually means that homing is failing, by not triggering one or more of the homing switches. Does each carriage stop cleanly when it pushes the switch?

    Please share your homedelta.g file.



  • they are optical endstops, they home, move back a little then do a slow home and offset 5mm. homes like it always has.

    ; homedelta.g
    ; called to home all towers on a delta printer
    ;
    ; generated by RepRapFirmware Configuration Tool on Mon May 22 2017 22:56:20 GMT-0400 (Eastern Daylight Time)

    ; Use relative positioning
    G91

    ; Move all towers to the high end stopping at the endstops (first pass)
    G1 X505 Y505 Z505 F3000 S1

    ; Go down a few mm
    G1 X-5 Y-5 Z-5 F1800 S2

    ; Move all towers up once more (second pass)
    G1 X10 Y10 Z10 F360 S1

    ; Move down a few mm so that the nozzle can be centred
    G1 Z-5 F6000

    ; Switch back to absolute positioning and go to the centre
    G90
    G1 X0 Y0 F6000

    M280 P3 S10 I1


  • administrators

    Are you certain that all 3 endstops are triggering? Use the Machine Properties page of DWC to check that the endstops are working properly.

    Are you sure that you haven't created any additional axes using M584?



  • I spoke too soon, its back:

    1:33:33 PM
    Attempt to move the head of a Delta or SCARA printer before homing the towers
    1:33:29 PM
    G32
    Attempt to move the head of a Delta or SCARA printer before homing the towers
    Error: Homing failed
    Error: Insufficient axes homed for bed probing
    Error: Insufficient axes homed for bed probing
    Error: Insufficient axes homed for bed probing
    Error: Insufficient axes homed for bed probing
    Error: Insufficient axes homed for bed probing
    Error: Insufficient axes homed for bed probing
    Error: Insufficient axes homed for bed probing
    Error: Insufficient axes homed for bed probing
    Error: Insufficient axes homed for bed probing
    Error: Insufficient axes homed for bed probing
    Error: Insufficient axes homed for bed probing
    Error: Insufficient axes homed for bed probing
    Error: Insufficient axes homed for bed probing

    it does this the first time, when I tell it to home a second time it appears to work as normal


  • administrators

    Is 505mm (the value in your first G1 S1 xcommand) enough to ensure that no matter where the effector starts from, no carriage will have to move up more than 505mm before it triggers the homing switch? On my 1m high delta it isn't and I use 700mm instead.



  • 520-525 should be enough then as it was 515 before I took the PEI sheet off. I kept looking at my config height that was set. If I keep making enough mistakes I'll be an expert one day 😄


 

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