Whinning noise from heated bed

[kickjaw]

Hello,

I am trying to use a prusa Mk3 heated bed with the duet wifi. It works but I get this awful ringing/whining noise when it goes about 50C or so.

; General preferences
G90                                                        ; Set absolute coordinates
M83                                                        ; Set relative extruder moves
M550 P"Prusa Duet"                                          ; Set printer name

; Network
M551 P"3D"                                                 ; Set password
M552 S1                                                    ; Enable network
M586 P0 S1                                                 ; Enable HTTP
M586 P1 S1                                                 ; Enable FTP
M586 P2 S0                                                 ; Disabled Telnet
M575 P1 S1 B38400                                          ; Enable support for PanelDue

; Drive Mappings S0 = backwards, S1 = forwards
M569 P0 S1                                                 ; Drive 0 goes forwards: X Axis
M569 P1 S0                                                 ; Drive 1 goes forwards: Y Axis
M569 P2 S0                                                 ; Drive 2 goes forwards: Z Axis Left
M569 P3 S1                                                 ; Drive 3 goes backward: E Axis
M569 P4 S0                                                 ; Drive 4 goes forwards: Z Axis Right (using E1)
M584 X0 Y1 Z2:4 E3

; Motor Configuration

;
M350 X16 Y16 Z16 I1                                        ; Set X, Y, and Z Microstepping with interpolation 
M350 E16 I0                                                ; Set Extruder Microstepping without interpolation 
M92 X100.00 Y100.00 Z400.00 E422                      ; Steps per mm
M566 X600.00 Y600.00 Z24.00 E300.00 P1                     ; Set maximum instantaneous speed changes (mm/min)
M203 X15000.00 Y15000.00 Z900.00 E2000.00                  ; Set maximum speeds (mm/min)
M201 X4000.00 Y4000.00 Z1000.00 E5000.00                   ; Set accelerations (mm/s^2)
M906 X750.00 Y850.00 Z750.00 E750.00 I10.                  ; Set motor currents (mA) and motor idle factor in percent
M84 S1000                                                  ; Set idle timeout before shifitng to idle-current  

; Motor remapping for dual Z and axis Limits
                                         ; Set two Z motors connected to driver outputs Z and E1
M671 X-37:287 Y0:0 S10                                     ; Leadscrew at left connected to Z, leadscrew at right connected to E1  

; Set bed dimensions
M208 X-13:240 Y-14:215 Z-0.1:205                              ; X carriage moves from 0 to 250, Y bed goes from 0 to 210
M564 H0                                                    ; Allow unhomed movement

; Endstops for each Axis
M574 X1 S3                                                 ; Set endstops controlled by the motor load detection
M574 Y1 S3                                                 ; Set endstops controlled by the motor load detection


; Stallgaurd Sensitivity
M98 P"current-sense-homing.g"                              ; Set the current and sensitivity for normal routine, per the macro

; Z-Probe Settings for BLTouch
M558 P9 C"^zprobe.in" H5 F200 T3000
G31 P1000 X58 Y-10 Z3.04
M950 S0 C"exp.heater3"
M574 Z1 S2
M557 X-8:190 Y0:200 P8



; Heatbed Heaters and Thermistor Bed 
M308 S0 P"bed_temp" Y"thermistor" A"Build Plate" T100000 C7.06e-8 R4700 ; Set thermistor + ADC parameters for heater 0 Bed
M950 H0 C"bedheat" T0 Q40000                                    ; Creates Bed Heater frequency to try to stop buzzing
M307 H0 A91.5 C264.0 D10.2 S1.00 V24.0 B0                  ; Bed PID Calibration @ 75c - updated 11AUG2020
M140 H0                                                    ; Bed uses Heater 0
M143 H0 S120                                               ; Set temperature limit for heater 0 to 120C Bed
 

; HotEnd Heaters and Thermistor HotEnd
; !!! Use this line for stock thermisotr: M308 S1 P"e0_temp" Y"thermistor" A"Nozzle" T100000 B4725 R4700  ; Set thermistor + ADC parameters for heater 1 HotEnd
M308 S1 P"e_0temp" Y"thermistor" T100000 B4388 C7.06e-8    ; Set thermistor + ADC parameters for heater 1 HotEnd
M950 H1 C"e0heat" T1                                       ; Create HotEnd Heater
M307 H1 A311.0 C130.0 D4.3 S1.00 V24.1 B0                  ; Hotend PID Calibration @ 240c - updated 09AUG2020
M143 H1 S300                                               ; Set temperature limit for heater 1 to 285C HotEnd
M302 S190 R190                                             ; Allow cold extrudes, S-Minimum extrusion temperature, R-Minimum retraction temperature

; Fans
M950 F1 C"Fan1" Q25000                                      ; Creates HOTEND Fan  
                                                           ; FAN 40X10MM 24VDC - 6.0 CFM (0.168m³/min). 
                                                           ; Digi-Key: G4010L24B-RSR  
M106 P1 T45 S255 H1                                        ; HOTEND Fan Settings  


M950 F0 C"Fan0" Q25000                                      ; Creates PARTS COOLING FAN
                                                           ; BLOWER 50X15MM 24VDC - 5.0 CFM (0.140m³/min)
                                                           ; Digi-Key: B5015E24B-BSR
M106 P0 H-1                                                ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off PARTS COOLING FAN

M950 F2 C"Fan2" Q25000                                      ; Creates PARTS COOLING FAN
                                                           ; BLOWER 50X15MM 24VDC - 5.0 CFM (0.140m³/min)
                                                           ; Digi-Key: B5015E24B-BSR
M106 P2 H-1                                                ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off PARTS COOLING FAN





; The following lines are for auto case fan control, attached to 'fan2' header on duet board
;M308 S4 Y"drivers" A"TMC2660"                              ; Case fan - configure sensor 2 as temperature warning and overheat flags on the TMC2660 on Duet
                                                           ; !!! Reports 0C when there is no warning, 100C if any driver reports over-temperature
                                                           ; !!! warning , and 150C if any driver reports over-temperature shutdown
;M308 S3 Y"mcu-temp" A"Duet2Wifi"                           ; Case fan - configure sensor 3 as thermistor on pin e1temp for left stepper
;M950 F2 C"fan2" Q100                                       ; Case fan - create fan 2 on pin fan2 and set its frequency                        
;M106 P2 H4:3 L0.15 X1 B0.3 T40:70                          ; Case fan - set fan 2 value
;M912 P0 S-5.5                                              ; MCU Temp calibration - default reads 5.5c higher than ambient

; Tools
M563 P0 D0 H1 F0:2                                           ; 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
T0                                                         ; Set Tool 0 active



; Relase X, Y, and E axis
M18 XYZE                                                    ; Unlock the X, Y, and E axis
M501
 
 
 M302 P1

[oliof]

Set the Q value in line 63 to 10 or so and try again.

[kickjaw]

@oliof

That solved it thanks