Heater 0 fault after upgrade to FW 3.1.1



  • Hi
    After upgrading to FW 3.1.1 im getting a Heater 0 fault - Temperature rising much slower than expected

    Machine i3 steel . 12VDC alu bed - 100K thermistor

    Old Config for FW 2.05 that has worked fine

    ; Heaters
    M305 P0 T100000 B3988 R4700                ; Set thermistor + ADC parameters for heater 0
    M143 H0 S120                               ; Set temperature limit for heater 0 to 120C
    M305 P1 T100000 B4725 C7.060000e-8 R4700   ; Set thermistor + ADC parameters for heater 1
    M143 H1 S280                               ; Set temperature limit for heater 1 to 280C
    

    New config for FW 3.1.1

    ; 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 S110                                   ; set temperature limit for heater 0 to 110C
    
    
    M308 S1 P"e0temp" Y"thermistor" T100000 B4725C7.060000e-8   ; 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
    M143 H1 S250                                   ; set temperature limit for heater 1 to 250C
    

    The bed was always a bit slow to heat up but worked OK
    I can see the bed working as it heats a few degrees before the fault occurs.
    Im still a bit confused by the new notation in the RRF 3 and would appreciate some help
    Thanks in advance






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