Delta Homing - Switch open when finished



  • Currently setting up a Duet 2 WiFi on a FLSUN QQ-S Pro. Each time I switch the machine on it says that xy and z are not homed. I run the home all and the switches do activate, the LEDs go off but by the end of the process everything has moved back down and the LEDs are back on. My homedelta.g is as below (the slow speed has been left intentionally for the moment:
    ; homedelta.g
    ; called to home all towers on a delta printer
    ;
    ; generated by RepRapFirmware Configuration Tool v3.1.4 on Tue Jul 21 2020 20:30:14 GMT+0100 (British Summer Time)
    G91 ; relative positioning
    ;*** Slow homing has been configured. Change F180 to F1800 below when your configuration is working
    G1 H1 X370 Y370 Z370 F200 ; move all towers to the high end stopping at the endstops (first pass)
    G1 H2 X-5 Y-5 Z-5 F200 ; go down a few mm
    ;*** Slow homing has been configured. Change F180 to F360 below when your configuration is working
    G1 H1 X8 Y8 Z8 F180 ; move all towers up once more (second pass)
    G1 Z-5 F200 ; move down a few mm so that the nozzle can be centred
    G90 ; absolute positioning
    G1 X0 Y0 F200


  • administrators

    Which LEDs are you referring to? If you mean the endstop LEDs on the Duet, it's normal for them to be on when the homing switches are not triggered. The important thing is that after homing, Duet Web Control no longer says that the axes haven't been homed.



  • Thanks for the response. Yes I do mean the end-stop LEDs. The web control does stop saying that axis are not homed. I'll just need to home at start up.
    Thanks again.
    Pete.


  • Moderator

    @PeteL said in Delta Homing - Switch open when finished:

    I'll just need to home at start up.

    That's normal. When the motors are turned off their position becomes unknown. Even if they haven't obviously moved they will jump to the nearest full step (or two or four and in all different directions) when re-energized so you must rehome to ensure correct positioning.



  • @Phaedrux said in Delta Homing - Switch open when finished:

    When the motors are turned off their position becomes unknown

    Aah, I see. Thanks for the clarification, that makes sense now.
    Pete.


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