[Solved] Multiple independent Z motors and Motor current



  • thanks dc

    but the command is before the others
    ; Drives
    M584 X0 Y1 Z2:4 ; Two Z motors connected to driver outputs 2 and 4
    M569 P0 S0 ; Drive 0 goes backwards
    M569 P1 S0 ; Drive 1 goes backwards
    M569 P2 S0 ; Drive 2 goes backwards
    M569 P3 S0 ; Drive 3 goes backwards
    M569 P4 S0 ; Drive 4 goes backwards (Z2 in the E1)
    M569 P0 V118 ; Stealthchop2 till about 78 mm/sec
    M569 P1 V118 ; Stealthchop2 till about 78 mm/sec
    M569 P2 V118 ; Stealthchop2 till about 78 mm/sec
    M569 P3 D2 ; Extruder in Spreadcyle
    M569 P4 V118 ; Stealthchop2 till about 78 mm/sec
    M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
    M92 X80 Y80 Z1600 E414 ; Set steps per mm
    M566 X900 Y900 Z12 E240 ; Set maximum instantaneous speed changes (mm/min)
    M203 X18000 Y18000 Z180 E3000 ; Set maximum speeds (mm/min)
    M201 X3000 Y3000 Z250 E10000 ; Set accelerations (mm/s^2)
    M906 X1200 Y1200 Z800 E1200 I30 ; Set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout
    M671 X-75:295 Y110:110 S0.5 ; leadscrews at mid left, and mid right

    Issuing M906 Produces
    Motor current (mA) - X:1200, Y:1200, Z:800, E:1200:1200:1200:1200, idle factor 30%
    So the second Z is at 1200 mA.



  • Don’t you need to set the current, speeds, accelerations, jerk and steps per mm for the other axis by assigning it to a different axis. I think the next one is U. There is a section about setting up multi z axis and it explains it there. I can post an excerpt from my config file when I get back to my computer it a couple of hours. I am running 4 z motors


  • administrators

    See the part of https://duet3d.dozuki.com/Wiki/Gcode#Section_M584_Set_drive_mapping that is emphasized in bold text.



  • @Veti

    Here is an excerpt from my config. This is when I was running the three z axis motors

    ; Drives

    M569 P0 S1 ; Drive 0 goes forwards X Axis
    M569 P1 S0 ; Drive 1 goes forwards Y Axis
    M569 P2 S0 ; Drive 2 goes forwards Z Axis FL
    M569 P3 S1 ; Drive 3 goes forwards Z Axis RC
    M569 P4 S0 ; Drive 4 goes forwards Z Axis FR
    M569 P5 S1 ; Drive 5 goes forwards Extruder

    ; Motor remapping for dual Z

    M584 X0 Y1 Z2:3:4 U3 V4 E5 P5 ; Driver 0 For X, 1 for Y, Z=2:3:4 U3 V4, Extruder 5
    M350 X16 Y16 Z16:16:16 U16 V16 I1 ; Configure microstepping with interpolation
    M350 E8 ; Set Extruder to 8x Microstepping with no interpolation
    M92 X80 Y80 Z400:400:400 U400 V400 E1900 ; Set steps per mm 2149.14
    M566 X60 Y60 Z20:20:20 U20 V20 E6 ; Set maximum instantaneous speed changes (mm/min)
    M203 X10000 Y10000 Z800:800:800 U800 V800 E3600 ; Set maximum speeds (mm/min)
    M201 X3000 Y3000 Z250:250:250 U250 V250 E120 ; Set accelerations (mm/s^2)
    M906 X1000 Y1000 Z1850:1850:1850 U1850 V1850 E600 I75 ; Set motor currents (mA) and motor idle factor in %
    M84 S30 ; Set idle timeout

    You will see that I had to put the U and V values in for each axis as in theory they are another axis that is then bound with the M584 command.



  • @samlogan87

    thanks sam.

    that also looks like a workaround like mine.
    what is your output of the M906 command?



  • @veti Aren't you missing to explicitly assign the motor of your extruder / E:3 in your M584 command, to remove the 4 from its default assignment ?

    https://duet3d.dozuki.com/Wiki/Gcode#Section_M584_Set_drive_mapping
    Assigning a drive using M584 does not remove its old assignment. Therefore, if you assign a drive that defaults to being an extruder drive, you should also assign the extruder drives explicitly as in the above example. Failure to do so may result in unexpected behaviour.



  • Hi @Veti

    My M906 command is there

    Regards,
    Sam



  • @scachi

    thanks that was it.


  • administrators

    @veti said in Multiple independent Z motors and Motor current:

    @scachi

    thanks that was it.

    ...which is why there is that bold text in the description of M584 on the GCodes wiki page.



  • yes sometimes you need another pair of eyes to double check your config


 

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