Help with setting up motors.



  • As soon as I try to update the motor settings it doesn't start in the middle hot it goes to the far right corner. Also when I tell it to mesh it starts at about 100mm in from the front of the bed. May I did something wrong but before updating the speed it worked perfect. Is there somewhere I can read so I understand about the motors setup.

    Here is the Config file.

    ; Configuration file for Duet WiFi (firmware version 1.20 or newer)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool on Sat Mar 03 2018 14:29:05 GMT-0500 (Eastern Standard Time)

    ; General preferences
    G90 ; Send absolute coordinates...
    M83 ; ...but relative extruder moves

    ; Network
    M550 P"Black Widow" ; Set machine name
    M552 S1 ; Enable network
    M587 S"NETWORKNAMEHERE" P"NETWORKPASSWORDHERE" ; Configure access point. You can delete this line once connected
    M586 P0 S1 ; Enable HTTP
    M586 P1 S0 ; Disable FTP
    M586 P2 S0 ; Disable Telnet

    ; Drives
    M569 P0 S1 ; Drive 0 goes forwards X
    M569 P1 S0 ; Drive 1 goes backwards Y
    M569 P2 S1 ; Drive 2 goes backwards Z
    M569 P3 S1 ; Drive 3 goes forwards E

    M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
    M92 X157.64 Y157.64 Z5120 E301.54 ; Set steps per mm for 16x microstepping
    M566 X600 Y600 Z12 E120 ; Set maximum instantaneous speed changes (mm/min)
    M203 X6000 Y6000 Z180 E1200 ; Set maximum speeds (mm/min)
    M201 X500 Y20 Z250 E250 ; Set accelerations (mm/s^2)
    M906 X1200 Y1200 Z1200 E1000 I30 ; Set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout

    ; Axis Limits
    M208 X0 Y0 Z0 S1 ; Set axis minima
    M208 X335 Y260 Z250 S0 ; Set axis maxima

    ; Endstops
    M574 X1 Y1 S1 ; Set active low endstops
    M574 Z1 S1 ; Set endstops controlled by probe
    M557 X0:335 Y45:260 S20 ; Define mesh grid

    ; Heaters
    M301 H0 S1.00 P32.6 I1.360 D79.4 T0.4 W180 B30 ; Use PID on bed heater (may require further tuning)
    M305 P0 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 0
    M143 H0 S80 ; Set temperature limit for heater 0 to 80C
    M305 P1 T100000 B4725 C7.060000e-8 R4700 ; Set thermistor + ADC parameters for heater 1
    M143 H1 S240 ; Set temperature limit for heater 1 to 220C

    ; Fans
    M106 P0 S0 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
    M106 P1 S1 I0 F500 H1 T100 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
    M106 P2 S0 I0 F500 H-1 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned off

    ; Tools
    M563 P0 D0 H1 F2 ; Define tool 0
    G10 P0 X0 Y0 Z0 ; Set tool 0 axis offsets
    G10 P0 R0 S0 ; Set initial tool 0 active and standby temperatures to 0C

    ; Automatic saving after power loss is not enabled

    ; Custom settings are not configured

    M307 H7 A-1 C-1 D-1 ;
    M558 P5 X0 Y0 Z1 H9 F200 T6000
    G31 X-48.8 Y-18.2 Z0.445 P25

    ; Miscellaneous
    M501
    T0 ; Select first tool



  • I have been messing around with the motor setting. When I change this line the beg starts about 100mm in from the front and about 30mm from the left. M92 X157.64 Y157.64 Z5120 E301.54 when meshing the bed. Also if I do Z home it goes to the far right corner not the middle of the bed.

    Just from messing around with it this works perfect so far.
    M92 X90.64 Y90.64 Z5120 E456 ; Set steps per mm


  • administrators

    @saltypetz generally steps/mm for motion axis should be calculated, not determined by experiment.

    Prusa has a good calculator:

    for belt
    https://www.prusaprinters.org/calculator/#stepspermmbelt

    Or leadscrews
    https://www.prusaprinters.org/calculator/#stepspermmlead



  • Is there more information that I can read so I have a better understanding what all the numbers are for.
    I went on the calculator but I want to have better understanding of all the settings. I want to understand what they all do. If there is a link to something I can read can you please post the link.

    Thank you, everyone for the help.



  • Could the belt be the problem making it go across the bed. I am looking for information on it now.
    Here is the link to the belt. https://tevo3dprinterstore.com/products/10meter-gt2-6mm-open-timing-belt



  • Here are the setting for micron cobra motors.

    M92 E1600; Set steps per mm for 16x microstepping
    M566 E120; Set maximum instantaneous speed changes (mm/min)
    M203 E1200; Set maximum speeds (mm/min)
    M201 E600; Set accelerations (mm/s^2)
    M906 E800 I30; Set motor currents (mA) and motor idle factor in per cent


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