RRF3.1.1 heat bed not heating fast enough vs RFF2.02



  • Duet Web Control 3.1.1
    Duet WiFi Server Version: 1.23
    Board: Duet 2 (revision 1.04)
    Firmware: RepRapFirmware for Duet 2 WiFi/Ethernet 3.1.1 (2020-05-19b2)

    PSU (500W, 24V, 1yr 3months old): MEAN WELL RSP-500-24

    I recently upgraded from 2.02 to 3.1.1 and my heat bed is now throwing heater fault for being too slow. I used the config tool and tried PID and Bang Bang and neither heated the bed fast enough from 26C and set to 50C.

    I tested the voltage from the duet to my mosfet and to the bed and were at ~24V and during the brief heating cycle my smart plug was reporting ~360W being used (I usually see ~400W's). When I used 2.02 about a month ago for my last print it was working fine. I'm not sure why there's a ~2 amp deficit going to the heat bed, but that is causing my prints to not start (I always have my heat bed on for prints).

    My config.g just in case:

    ; Configuration file for Duet WiFi (firmware version 3)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool v3.1.3 on Sat Jun 13 2020 17:19:32 GMT-0700 (Pacific Daylight Time)
    
    ; General preferences
    G90                                            ; send absolute coordinates...
    M83                                            ; ...but relative extruder moves
    M550 P"X5S Duet 2 WiFi"                        ; set printer name
    M669 K1                                        ; select CoreXY mode
    
    ; Network
    M551 P"omitted"	                               ; set password
    M552 S1                                        ; enable network
    M586 P0 S1                                     ; enable HTTP
    M586 P1 S1                                     ; enable FTP
    M586 P2 S0                                     ; disable Telnet
    
    ; Drives
    M569 P0 S0                                     ; physical drive 0 goes backwards
    M569 P1 S0                                     ; physical drive 1 goes backwards
    M569 P2 S1                                     ; physical drive 2 goes forwards
    M569 P3 S1                                     ; physical drive 3 goes forwards
    M584 X0 Y1 Z2 E3                               ; set drive mapping
    M350 X16 Y16 Z16 E16 I1                        ; configure microstepping with interpolation
    M92 X80.00 Y80.00 Z400.00 E420.00              ; set steps per mm
    M566 X600.00 Y600.00 Z12.00 E300.00            ; set maximum instantaneous speed changes (mm/min)
    M203 X6000.00 Y6000.00 Z180.00 E1200.00        ; set maximum speeds (mm/min)
    M201 X3000.00 Y3000.00 Z20.00 E10000.00        ; set accelerations (mm/s^2)
    M906 X800 Y800 Z800 E800 I35                   ; set motor currents (mA) and motor idle factor in per cent
    M84 S3000                                      ; Set idle timeout
    
    ; Axis Limits
    M208 X0 Y0 Z0 S1                               ; set axis minima
    M208 X318 Y310 Z400 S0                         ; set axis maxima
    
    ; Endstops
    M574 X1 S1 P"xstop"                            ; configure active-high endstop for low end on X via pin xstop
    M574 Y2 S1 P"ystop"                            ; configure active-high endstop for high end on Y via pin ystop
    M574 Z1 S1 P"zstop"                            ; configure active-high endstop for low end on Z via pin zstop
    
    ; Z-Probe
    M950 S0 C"exp.heater7" 						   ; create servo pin 0 for BLTouch
    M558 P5 C"zprobe.in" H5 F120 T6000  ; set Z probe type to switch and the dive height + speeds
    G31 P500 X0 Y0 Z0                              ; set Z probe trigger value, offset and trigger height
    M557 X30:290 Y15:290 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 S100                                   ; set temperature limit for heater 0 to 100C
    M308 S1 P"e0temp" Y"thermistor" T100000 B4138  ; 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
    
    ; Fans
    M950 F0 C"fan0" Q500                           ; create fan 0 on pin fan0 and set its frequency
    M106 P0 S0 H T45                               ; set fan 0 value. Thermostatic control is turned on
    M950 F1 C"fan1" Q500                           ; 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
    
    ; Miscellaneous
    M575 P1 S1 B57600                              ; enable support for PanelDue
    

  • Moderator

    @bl8900 said in RRF3.1.1 heat bed not heating fast enough vs RFF2.02:

    tried PID and Bang Bang

    Does that mean you ran the PID auto tune on the bed heater? Did it complete? Did you save the results with M500 to save them to config-override.? Your config.g is missing an M501 at the end to load the config-override.g file.



  • I've never ran PID auto tune on either version. When I was running 2.02, it was able to hold temperature quite well, so I never went further with it. I reran the config tool with PID with the added M501 at the end but still get

    Error: Heater 0 fault: temperature rising much more slowly than the expected 1.0°C/sec
    

    new config.g:

    ; Configuration file for Duet WiFi (firmware version 3)
    ; executed by the firmware on start-up
    ;
    ; generated by RepRapFirmware Configuration Tool v3.1.3 on Sat Jun 13 2020 21:28:18 GMT-0700 (Pacific Daylight Time)
    
    ; General preferences
    G90                                            ; send absolute coordinates...
    M83                                            ; ...but relative extruder moves
    M550 P"X5S Duet 2 WiFi"                        ; set printer name
    M669 K1                                        ; select CoreXY mode
    
    ; Network
    M551 P"omitted"                             ; set password
    M552 S1                                        ; enable network
    M586 P0 S1                                     ; enable HTTP
    M586 P1 S1                                     ; enable FTP
    M586 P2 S0                                     ; disable Telnet
    
    ; Drives
    M569 P0 S0                                     ; physical drive 0 goes backwards
    M569 P1 S0                                     ; physical drive 1 goes backwards
    M569 P2 S1                                     ; physical drive 2 goes forwards
    M569 P3 S1                                     ; physical drive 3 goes forwards
    M584 X0 Y1 Z2 E3                               ; set drive mapping
    M350 X16 Y16 Z16 E16 I1                        ; configure microstepping with interpolation
    M92 X80.00 Y80.00 Z400.00 E90.00               ; set steps per mm
    M566 X600.00 Y600.00 Z12.00 E300.00            ; set maximum instantaneous speed changes (mm/min)
    M203 X6000.00 Y6000.00 Z180.00 E1200.00        ; set maximum speeds (mm/min)
    M201 X3000.00 Y3000.00 Z20.00 E10000.00        ; set accelerations (mm/s^2)
    M906 X800 Y800 Z800 E800 I35                   ; set motor currents (mA) and motor idle factor in per cent
    M84 S3000                                      ; Set idle timeout
    
    ; Axis Limits
    M208 X0 Y0 Z0 S1                               ; set axis minima
    M208 X318 Y310 Z400 S0                         ; set axis maxima
    
    ; Endstops
    M574 X1 S1 P"xstop"                            ; configure active-high endstop for low end on X via pin xstop
    M574 Y2 S1 P"ystop"                            ; configure active-high endstop for high end on Y via pin ystop
    M574 Z1 S1 P"zstop"                            ; configure active-high endstop for low end on Z via pin zstop
    
    ; Z-Probe
    M558 P5 C"zprobe.in+zprobe.mod" H5 F120 T6000  ; set Z probe type to switch and the dive height + speeds
    G31 P500 X0 Y0 Z0                              ; set Z probe trigger value, offset and trigger height
    M557 X30:290 Y15:290 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 B0 S1.00                               ; disable bang-bang mode for the bed heater and set PWM limit
    M140 H0                                        ; map heated bed to heater 0
    M143 H0 S100                                   ; set temperature limit for heater 0 to 100C
    M308 S1 P"e0temp" Y"thermistor" T100000 B4138  ; 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
    
    ; Fans
    M950 F0 C"fan0" Q500                           ; create fan 0 on pin fan0 and set its frequency
    M106 P0 S0 H T45                               ; set fan 0 value. Thermostatic control is turned on
    M950 F1 C"fan1" Q500                           ; 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
    
    ; Miscellaneous
    M575 P1 S1 B57600                              ; enable support for PanelDue
    M501                                           ; load saved parameters from non-volatile memory
    
    
    

    Edit: After finding the auto PID procedure, I can now get my heated bed running without throwing a fault. Thanks Phaedrux for pointing out auto PID.


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