Wierd issues



  • Good idea, but not sure if that is correct here are the specs on the motors...not much info but you could be on to something.

    Product Parameters:
    Product name: Bipolar 42 Stepper Motor
    Holding torque: 0.46 N•m/ 65 oz-in
    Working voltage: DC 9-42V
    Rated current: 1.7A
    Resistance: 2.1 ohm
    Inductance: 4mH
    Rotor inertia: 55g•cm2/ 0.30oz-in2
    Weight: 0.28kg
    Length: 39.5mm/ 1.56 inch
    Phrase: 2
    Step angle: 1.8°
    Motor frame size: 42*42mm



  • Nope, they are 200 step motors. Would need to know the number of teeth on your pulleys to know the steps per mm, but if the old motors were also 1.8degree/ 200 step motors it would be the same.

    Can you post your homing files as well?



  • I just changed the pulley's to 20 teeth. Here are the home files, thanks again for the help!

    ; homex.g
    ; called to home the X axis
    ;
    ; generated by RepRapFirmware Configuration Tool on Sat May 05 2018 19:20:14 GMT-0400 (Eastern Daylight Time)
    G91 ; relative positioning
    G1 Z5 F6000 S2 ; lift Z relative to current position
    G1 S1 X-225 F1800 ; move quickly to X axis endstop and stop there (first pass)
    G1 X5 F6000 ; go back a few mm
    G1 S1 X-225 F360 ; move slowly to X axis endstop once more (second pass)
    G1 Z-5 F6000 S2 ; lower Z again
    G90 ; absolute positioning

    ; homey.g
    ; called to home the Y axis
    ;
    ; generated by RepRapFirmware Configuration Tool on Sat May 05 2018 19:20:14 GMT-0400 (Eastern Daylight Time)
    G91 ; relative positioning
    G1 Z5 F6000 S2 ; lift Z relative to current position
    G1 S1 Y-225 F1800 ; move quickly to Y axis endstop and stop there (first pass)
    G1 Y5 F6000 ; go back a few mm
    G1 S1 Y-225 F360 ; move slowly to Y axis endstop once more (second pass)
    G1 Z-5 F6000 S2 ; lower Z again
    G90 ; absolute positioning

    ; homez.g
    ; called to home the Z axis
    ;
    ; generated by RepRapFirmware Configuration Tool on Sat May 05 2018 19:20:14 GMT-0400 (Eastern Daylight Time)
    G91 ; relative positioning
    G1 Z5 F6000 S2 ; lift Z relative to current position
    G1 S1 Z-245 F1800 ; move Z down until the switch triggers
    G92 Z2.5 ; set Z position to trigger height

    ; Uncomment the following lines to lift Z after probing
    ;G91 ; relative positioning
    ;G1 Z5 F100 S2 ; lift Z relative to current position
    ;G90 ; absolute positioning

    ; homeall.g
    ; called to home all axes
    ;
    ; generated by RepRapFirmware Configuration Tool on Sat May 05 2018 19:20:14 GMT-0400 (Eastern Daylight Time)
    G91 ; relative positioning
    G1 Z5 F6000 S2 ; lift Z relative to current position
    G1 S1 X-225 Y-225 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)
    G1 X5 Y5 F6000 ; go back a few mm
    G1 S1 X-225 Y-225 F360 ; move slowly to X and Y axis endstops once more (second pass)
    G1 S1 Z-245 F1800 S1 ; move Z down stopping at the endstop
    G90 ; absolute positioning
    G92 Z2.5 ; set new Z position
    ;G1 Z5 F100 S2 ; uncomment this line to lift the nozzle after homing


  • administrators

    How far can you move the X and Y axes, and does Duet Web Control say they have moved those distances or different distances?



  • @dgdgdgdg said in Wierd issues:

    its all relative to where I the printer head is when I hit home. I can move from there but not beyond. I thought when it homes, that it was supposed to go to the endstops? All it does is move a few mm's in each direction and then the homing is complete and then it says head position is at x 0.0 y 0.0 and z 2.5, no matter where the head is actually located...I am sure its something I am doing wrong but its frustrating to say the least lol


  • administrators

    I suspect your endstop switches are reading in reverse. Test them, see https://duet3d.dozuki.com/Wiki/Connecting_endstop_switches#Section_Test_endstop_switches.



  • Okay I fixed that, now when it homes It goes to the end stops, but should the endstops be 0,0,0? or do I need 0,0,0 to be the front left corner (when looking at printer) of my build plate? and if so can I fix that by just measuring how far away the end stop is from the bed?


  • administrators

    It's easiest if you make (0,0) either the front left corner of the bed or the centre of the bed. You are homing to axis minima, so it is the X and Y values in the M208 S1 command that define what the axis positions are when the endstop switches are triggered.



  • Thank you, I think I have it figured out now, trying out a test print



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