motor whine after movement



  • Hia,
    when I move my corexy axis the motors whine really badly, when no movement occurs i hardly realize it is on

    ; Configuration file for Duet WiFi (firmware version 3)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool v3.1.4 on Wed Oct 07 2020 00:20:48 GMT+0100 (British Summer Time)
    
    ; General preferences
    G90                                            ; send absolute coordinates...
    M83                                            ; ...but relative extruder moves
    M550 P"My Printer"                             ; set printer name
    M669 K1                                     ; select CoreXY mode
    
    ; 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 Backwards
    M569 P4 S1                                   ; physical drive 1 goes forwards
    M569 P2 S1                                     ; physical drive 2 goes forwards
    M569 P3 S1                                     ; physical drive 3 goes forwards
    M584 X0 Y4 Z2 E3                               ; set drive mapping
    M350 X64 Y64 Z16 E16 I1                        ; configure microstepping with interpolation
    M92 X400 Y400 Z600.00 E436.54              ; set steps per mm
    M566 X400 Y400 Z12.00 E120.00            ; set maximum instantaneous speed changes (mm/min)
    M203 X1500.00 Y1500.00 Z180.00 E1200.00        ; set maximum speeds (mm/min)
    M201 X500.00 Y500.00 Z20.00 E250.00            ; set accelerations (mm/s^2)
    M906 X800 Y800 Z1000 E800 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 X315 Y315 Z270 S0                         ; set axis maxima
    
    ; Endstops
    M574 X1 S1 P"!xstop"                          ; configure active-high endstop for low end on Y via pin ystop
    M574 Y1 S1 P"!e1stop"                           ; configure active-high endstop for low end on Y via pin ystop
    M574 Z1 S2                                     ; configure Z-probe endstop for low end on Z
    
    ; Z-Probe
    M950 H3 C"nil" ;
    M950 S0 C"exp.heater3"                         ; create servo pin 0 for BLTouch
    M558 P9 C"^zprobe.in" H5 F120 T6000            ; set Z probe type to bltouch and the dive height + speeds
    G31 P500 X0 Y0 Z2.5                            ; set Z probe trigger value, offset and trigger height
    M557 X15:215 Y15:195 S20                       ; define mesh grid
    
    ; Z-Probe
    ;M558 P0 H20 F120 T6000                         ; disable Z probe but set dive height, probe speed and travel speed
    ;M557 X15:215 Y15:195 S20                       ; define mesh grid
    
    ; Heaters
    M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin bedtemp
    M950 H0 C"bedheat" T0                          ; create bed heater output on bedheat and map it to sensor 0
    M307 H0 B1 S1.00                               ; enable bang-bang mode for the bed heater and set PWM limit
    M140 H0                                        ; map heated bed to heater 0
    M143 H0 S150                                   ; set temperature limit for heater 0 to 150C
    M308 S1 P"e0temp" Y"thermistor" T100000 B3950 ; configure sensor 1 as thermistor on pin e0temp
    M950 H1 C"e0heat" T1                           ; create nozzle heater output on e0heat and map it to sensor 1
    M307 H1 B0 S1.00                               ; disable bang-bang mode for heater  and set PWM limit
     M140 H-1
    
    ; Fans
    M950 F0 C"fan0" Q2500                           ; create fan 0 on pin fan0 and set its frequency
    M106 P0 S0 H-1                                 ; set fan 0 value. Thermostatic control is turned off
    M950 F1 C"fan1" Q2500                           ; create fan 1 on pin fan1 and set its frequency
    M106 P1 S1 H1 T45                              ; set fan 1 value. 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
    
    
    

    My printer has yet to be calibrated yet and it has only one fuse on it rather than the three



  • First:
    Line 24: M350 X64 Y64 Z16 E16 I1
    By setting X and Y to 1/64th stepping, it prevents those drivers from using interpolation.
    There's not really any practical benefit to running 1/64th stepping anyway, as you are highly unlikely to actually get that mechanical resolution. Most people run 1/16th, and the interpolation just smooths the motion.

    But your question:
    The motors are whining because they are resonating (different motor windings will do that at different frequencies). The drivers try and avoid this with a clever thing called 'SpreadCycle', which is on by default. You can try playing with that setting by adding the command M569 Pnn Dnn
    For example: M569 P0 D2 sets the X driver to SpreadCycle. M569 P1 D1 will set the Y drive to random off time.

    For more info:
    https://duet3d.dozuki.com/Wiki/Gcode#Section_M569_Set_motor_driver_direction_enable_polarity_and_step_pulse_timing

    Remember you can just put the commands into the console to see their impact before you edit config.g

    If you are really desperate for silence, try 'StealthChop' but be aware that it drops the torque by a huge amount.
    If you want to know more about StealthChop and SpreadCycle, check out Trinamic's documentation.




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