hybrid setup for test: adding extra axis to delta

  • To test my new setup of duet delta i have to test it, so instead of disassembling working printer i decided to add extra motor with rail, endstop and belt. basically 1/3 of delta 👷 picture below.
    extra motor is 0.9 degree (current ones are 1.8) and is connected to E0 and i have added it as a new U axis.

    General idea: to run new motor for 10-15 hrs and see temperature, noise and other things.

    new axis is longer than current printer. so, the question:

    how to change that U-axis length in config.g with delta printer ? 🤕

    thank you in advance

    U-axis add-on:

    M569 P4 S1				; for TEST of extra motor 
    M584 X0 Y1 Z2 E3 U4 		; U4 for TEST of extra motor 
    M574 U2 S1 P"e0stop"  ;for TEST of extra motor 
    M92 X80 Y80 Z80 U200 		; Set axis steps/mm http://prusaprinters.org/calculator/#stepspermmbelt 
    M350 X16 Y16 Z16 E16 U16 I1    		; Set 16x microstepping with interpolation
    M906 X1250 Y1250 Z1250 E700 U1700		; Set motor currents (mA) 85% of rated


  • I don't have an answer... just chiming in to say how amusing that 1/3 printer looks...

    Great job!

  • found a solution

    M208 S1 U-220       ;  here we tell printer to "extend" U-axis below 0 up to -220 mm
    G1 F9000            ;  set high speed 
    G1 U190             ;  go all the way UP
    G1 U-220            ;  go down to -200
    G1 U190             
    G1 U-220            

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