extruder doesnt have any torque ( Cant move anything)



  • Pre Duet everything worked fine i swear lol

    ive been slowly sifting through issues from when i ported everything over to the Duet,
    my new problem came when i went to calibrate my extruder.

    i went to post a G1 E100 F60 and my extruder motor just sits there and wiggles the gear a little, like theres all of a sudden not enough torque to move the filament.
    i thought maybe it was an amperage problem so i increased it from 935mA to 1100mA which made zero difference. i also tried to lower it to 800mA and it also made no difference. i have checked the leads and they are solid and everything is plugged in the correct orientation.

    if i let the extruder just free with no filament in it will turn just fine, how ever ANY resistance on the gear and it will stop.

    i just decided to do an extruder test, ive got a couple new steppers here and this issue persists through to the new steppers. which rules out a faulty stepper.

    here is my config.g

    ; Configuration file for Duet WiFi (firmware version 2.03)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool v2.1.8 on Mon May 11 2020 00:13:10 GMT-0600 (Mountain Daylight Time)

    ; General preferences
    G90 ; send absolute coordinates...
    M83 ; ...but relative extruder moves
    M550 P"JoehBo3D" ; set printer name

    ; Network
    M552 S1 ; enable network
    M586 P0 S1 ; enable HTTP
    M586 P1 S0 ; disable FTP
    M586 P2 S0 ; disable Telnet

    ; Drives
    M569 P0 S1 ; physical drive 0 goes forwards
    M569 P1 S1 ; physical drive 1 goes forwards
    M569 P2 S1 ; physical drive 2 goes forwards
    M569 P3 S1 ; physical drive 3 goes forwards
    M569 P4 S1 ; physical drive 4 goes forwards
    M584 X0 Y1 Z2:4 E3 ; two Z motors connected to driver outputs Z and E1
    M671 X-20:220 Y0:0 S0.5 ; leadscrews at left (connected to Z) and right (connected to E1) of X axis
    M208 X-5:205 Y0:200 ; X carriage moves from -5 to 205, Y bed goes from 0 to 200
    M350 X16 Y16 Z16 E16:16 I1 ; configure microstepping without interpolation
    M92 X80.00 Y80.00 Z800.00 E723.38:800.00 ; set steps per mm
    M566 X1020.00 Y1020.00 Z24.00 E300.00:24.00 ; set maximum instantaneous speed changes (mm/min)
    M203 X6000.00 Y6000.00 Z180.00 E1200.00:180.00 ; set maximum speeds (mm/min)
    M201 X9000.00 Y9000.00 Z100.00 E10000.00:100.00 ; set accelerations (mm/s^2)
    M906 X935 Y935 Z935 E1100:935 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 X228 Y254 Z203 S0 ; set axis maxima

    ; Endstops
    M574 X1 Y1 S1 ; set active high endstops
    M574 Z1 S2 ; set endstops controlled by probe

    ; Z-Probe
    M558 P1 H3 F120 T6000 ; set Z probe type to unmodulated and the dive height + speeds
    G31 P600 X-24 Y-2 Z0.148 ; set Z probe trigger value, offset and trigger height
    M557 X-10:180 Y0:195 S20 ; 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 B4388 R4700 ; set thermistor + ADC parameters for heater 1
    M143 H1 S300 ; set temperature limit for heater 1 to 300C

    ; Fans
    M106 P0 S0 I0 F500 H1 T45 ; set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned on
    M106 P1 S1 I0 F500 H1:1 T45 ; set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on

    ; Tools
    M563 P0 D0 H1 F0 ; 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

    ; Custom settings are not defined

    M501



  • One thing to note is your M584 maps 2 drivers to Z and 1 to E but the remainder of your commands have 1 Z driver and 2 E drivers.

    You need to work through your drives section and standardise
    e.g.

    M350 X16 Y16 Z16 E16:16 I1 ; configure microstepping without interpolation
    M92 X80.00 Y80.00 Z800.00 E723.38:800.00 ; set steps per mm
    

    should be

    M350 X16 Y16 Z16:16 E16 I1 ; configure microstepping without interpolation
    M92 X80.00 Y80.00 Z800.00:800.00 E723.38 ; set steps per mm
    

    note the Z and E changes.

    Note sure what affect this will have to your current issue though


  • Moderator

    @joehsmash said in extruder doesnt have any torque ( Cant move anything):

    Definitely clean up the double extruder values, but the Z axis doesn't need to be doubled since the values for a single motion axis must be identical anyway. It's only extruders that can be different.

    You also have some spaces inserted in your commands after the :. Not sure if that would be ignored by the firmware or if it's causing an issue.

    You can send M98 Pconfig.g in the console to re-run the config.g and you may catch some error messages that wouldn't otherwise be shown at boot up.

    For the motor current, try setting the current to 60-85% of the rated max for the motor.

    Here's how I would clean up your drives block

    M584 X0 Y1 Z2:4 E3 ; two Z motors connected to driver outputs Z and E1
    M671 X-20:220 Y0:0 S0.5; leadscrews at left (connected to Z) and right (connected to E1) of X axis
    M208 X-5:205 Y0:200 ; X carriage moves from -5 to 205, Y bed goes from 0 to 200
    M350 X16 Y16 Z16 E16 I1; configure microstepping without interpolation
    M92 X80 Y80 Z800 E723 ; set steps per mm
    M566 X1020 Y1020 Z60 E3000 ; set maximum instantaneous speed changes (mm / min)
    M203 X6000 Y6000 Z400 E8000 ; set maximum speeds (mm / min)
    M201 X9000 Y9000 Z200 E3000 ; set accelerations (mm / s ^ 2)
    M906 X935 Y935 Z935 E1100 I30 ; set motor currents (mA) and motor idle factor in per cent
    

    I also made some changes for your extruder and z axis speed, accel and jerk values.



  • @Phaedrux i will run through these in a couple hours, tbh i used the reprap config tool and that's what she spit out.

    The only things i added/changed were directly related to the problems ive been having.

    Ie z motors individually controlled etc.

    Thanks for your input



  • @jay_s_uk also thanks for your input as well



  • @Phaedrux just out of curiosity i ran the m98 pconfig.g and it came back with this

    5/15/2020, 1:30:30 AM: Connected to 192.168.1.44
    5/15/2020, 1:35:20 AM: M98 PCONFIG.G: HTTP is enabled on port 80
    FTP is disabled
    TELNET is disabled
    Error: GCodes: Attempt to read a GCode unsigned array that is too long: M350 X16 Y16 Z16 E16:16 I1
    Error: GCodes: Attempt to read a GCode float array that is too long: M92 X80.00 Y80.00 Z800.00 E723.38:800.00
    Error: GCodes: Attempt to read a GCode float array that is too long: M566 X1020.00 Y1020.00 Z24.00 E300.00:24.00
    Error: GCodes: Attempt to read a GCode float array that is too long: M203 X6000.00 Y6000.00 Z180.00 E1200.00:180.00
    Error: GCodes: Attempt to read a GCode float array that is too long: M201 X9000.00 Y9000.00 Z100.00 E10000.00:100.00
    Error: GCodes: Attempt to read a GCode float array that is too long: M906 X935 Y935 Z935 E1100:935 I30



  • @joehsmash I think it should be M98 P"config.g" (in inverted commas). I don't think it matters with earlier firmware but in later versions it's mandatory (not sure when in changed).



  • after changes, m98 provides me with this

    5/15/2020, 1:40:21 AM:
    M98 PCONFIG.G: HTTP is enabled on port 80
    FTP is disabled
    TELNET is disabled



  • @deckingman tried to run as you suggested

    5/15/2020, 1:42:30 AM: M98 P CONFIG.G: Warning: Macro file CONFIG.G not found.
    5/15/2020, 1:42:52 AM: M98 P "config.g": Warning: Macro file "config.g" not found.



  • @Phaedrux that was it!

    swapped it all out like you suggested and BAM.

    stepper is so strong it wants to rip my finger off!



  • @joehsmash said in extruder doesnt have any torque ( Cant move anything):

    @deckingman tried to run as you suggested

    5/15/2020, 1:42:30 AM: M98 P CONFIG.G: Warning: Macro file CONFIG.G not found.
    5/15/2020, 1:42:52 AM: M98 P "config.g": Warning: Macro file "config.g" not found.

    I guess your problem is now sorted so it doesn't really matter, but that's odd. Maybe I read something wrong here https://duet3d.dozuki.com/Wiki/Gcode#Section_M98_Call_Macro_Subprogram



  • @deckingman spaces after the P would maybe cause that error!


  • Moderator

    @deckingman said in extruder doesnt have any torque ( Cant move anything):

    Maybe I read something wrong here

    I think the difference is that he's still on RRF2.

    @Dougal1957 said in extruder doesnt have any torque ( Cant move anything):

    spaces after the P would maybe cause that error!

    That could be.

    @joehsmash said in extruder doesnt have any torque ( Cant move anything):

    tepper is so strong it wants to rip my finger off!

    Glad that worked.


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