Strange behaviour after stepper motor change

  • Hi all, my first post here.

    I've build myself an Hypercube Evolution printer and was getting good results. Now i wanted to try something and orderd the e3d high torque stepper motors with 0.9° as I had 1.8° and was hoping to improve my print results.

    I've change my config accordingly and set up microstepping from 80 to 160. After setting everything up i get this behaviour:

    link text

    As you can hopefully see the printer slows down immensly when it prints infill. Outer perimeters print moves are just fine regarding my configured speed (70 mm/s). I can not understand what is happening. I used Simplify3d to generated the GCODE. The preview looks good. Testing GCODE from before the motor changes looks and prints also normal.

    Firmwarename: RepRapFirmware for Duet 2 WiFi/Ethernet
    Firmware Elektronik: Duet WiFi 1.02 or later
    Firmware Version: 2.03beta1 (2019-02-03b3)
    WiFi Server Version: 1.21
    Web Interface Version: 1.22.6

    Here are is my config.g:

    ; Configuration file for Duet WiFi (firmware version 1.21)
    ; executed by the firmware on start-up
    ; generated by RepRapFirmware Configuration Tool v2 on Sun Feb 10 2019 23:45:25 GMT+0100 (Mitteleuropäische Normalzeit)

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

    M667 S1 ; Select CoreXY mode

    ; Network
    M550 P"HypercubeEvolution" ; Set machine name
    M551 P"snoopy: ; Set password
    M552 S1 ; Enable network
    M586 P0 S1 ; Enable HTTP
    M586 P1 S1 ; Enable FTP
    M586 P2 S0 ; Disable Telnet

    ; Drives
    M569 P0 S1 ; Drive 0 "XY" front left goes backwards
    M569 P1 S1 ; Drive 1 "XY" front right goes backwards
    M569 P2 S1 ; Drive 2 "Z1" goes forwards
    M569 P3 S0 ; Drive 3 "Extruder" goes backwards
    M569 P4 S1 ; Drive 4 "Z2" goes forwards

    M584 X0 Y1 Z2:4 E3 ; Dual Z Motors at 2 and 4, extruder at 3
    M671 X-50:320 Y135:135 ; Leadscrews adjustments at (-50,135) and (320,135)

    M350 X16 Y16 Z16:16 E16 I1 ; Configure microstepping with interpolation
    M92 X160.00 Y160.00 Z1600.00:1600.00 E985.00 ; Set steps per mm
    M566 X480.00 Y480.00 Z12.00:12.00 E600.00 ; Set maximum instantaneous speed changes (mm/min)
    M203 X9000.00 Y9000.00 Z600.00:600.00 E600.00 ; Set maximum speeds (mm/min)
    M201 X1500.00 Y1500.00 Z250.00:250.00 E350.00 ; Set accelerations (mm/s^2)
    M906 X1000.00 Y1000.00 Z1000.00:1000.00 E1000.00 I30 ; Set motor currents (mA) and motor idle factor in per cent
    M84 S120 ; Set idle timeout

    ; Axis Limits
    M208 X-10 Y-20 Z0 S1 ; Set axis minima
    M208 X270 Y270 Z290 S0 ; Set axis maxima

    ; Endstops
    M574 X1 Y1 S3 ; Set endstops controlled by motor load detection

    ; Z-Probe
    M574 Z1 S2 ; Set endstops controlled by probe
    M307 H3 A-1 C-1 D-1 ; Disable heater on PWM channel for BLTouch
    M558 P9 H5 F120 T6000 ; Set Z probe type to bltouch and the dive height + speeds
    G31 P25 X29.7 Y0 Z0.8 ; Set Z probe trigger value, offset and trigger height
    M557 X30:240 Y30:240 S70 ; Define mesh grid

    ; Heaters
    M307 H0 B0 S1.00 ; Disable bang-bang mode for the bed heater and set PWM limit
    M305 P0 T100000 B4138 R4700 ; Set thermistor + ADC parameters for heater 0
    M143 H0 S120 ; Set temperature limit for heater 0 to 120C
    M305 P1 T100000 B4138 R4700 ; Set thermistor + ADC parameters for heater 1
    M143 H1 S280 ; Set temperature limit for heater 1 to 280C
    M307 H1 A311.5 C136.7 D4.0 S1

    ; Fans
    M106 P0 S0 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off

    ; Tools
    M563 P0 D0 H1 ; 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

    and the gcode i used:


    Hope you can give me some hints as what to look for!


  • Are you saying that files sliced before print fine, but files sliced now have the really weirdly slow infill?

    Have you tested another slicer like slic3r PE?

    Does the behaviour persist if you roll back to firmware version 2.02a?

  • administrators

    There was no need to change your slicer settings when you changed motors. It's best to change only one thing at a time. The fact that files sliced before the change print OK suggest that you accidentally changed something in the slicer, perhaps the speed for printing infill.


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