M303 failure and other heater problems

  • Just getting around to turning on heaters on this custom build...I'm using a filastrude volcano tip with their supplied heating element and thermistor.

    I was getting heater faults because of slow temp rise so I tried an M303 but that crapped out around 100 degrees C and said that it was cancelled because it did not meet the desired temp.

    This is my first outing with these types of heaters so I'm a bit lost. I have the extruder heater on E0 and the thermistor on E0. I have a fan wired up but I disconnected for now because I wasn't sure if it was a factor.

    I'm running the Duet at 12v currently.


    ; Configuration file for Duet WiFi (firmware version 1.21)
    ; executed by the firmware on start-up
    ; generated by RepRapFirmware Configuration Tool v2 on Wed Jan 16 2019 13:17:53 GMT-0500 (Eastern Standard Time)

    ; General preferences
    G90 ; Send absolute coordinates...
    M83 ; ...but relative extruder moves

    ; Network
    M550 P"AAM_Large_Volume_Printer" ; Set machine name
    M551 P"password: ; Set password
    M552 P10.0.0.55 S1 ; Enable network and set IP address
    M553 P255.255.255.0 ; Set netmask
    M554 P192.168.1.254 ; Set gateway
    M586 P0 S1 ; Enable HTTP
    M586 P1 S0 ; Disable FTP
    M586 P2 S0 ; Disable Telnet

    ;X Drive
    M584 X5 ; map drive 5 to X axis...both actuators use the same pulse train
    M92 X400 ; set steps/mm for X axis
    M569 P5 S0 T8.5:8.5:50.0:67.0 ; set drive timings for drive 5 (first drive on breakout board)

    ;Y Drive
    M584 Y6 ; map drive 6 to Y axis
    M92 Y400 ; set steps/mm for Y axis
    M569 P6 S0 T8.5:8.5:50.0:67.0 ; set drive timings for drive 6 (second drive on breakout board)

    ;Z Drive
    M584 Z7:9:10:11 S1 ; map drive 7, 8, 9, 10 to Z axis
    M671 X-232.537:-232.537:1291.463:1291.463 Y-202.3872:1169.2128:1169.2128:-202.3872 S8.0 ; define leadscrew locations
    M92 Z400 ; Set steps/mm for Z axis
    M569 P7:9:10:11 S1 T8.5:8.5:50.0:67.0 ; set drive timings for drive 7,8,9,10

    ; Drives
    M569 P1 S1 ; Drive 1 goes forwards
    M569 P2 S1 ; Drive 2 goes forwards
    M569 P3 S1 ; Drive 3 goes forwards

    M566 X500.00 Y500.00 Z20.00 E120.00 ; Set maximum instantaneous speed changes (mm/min)
    M203 X30000.00 Y30000.00 Z1000.00 E1200.00 ; Set maximum speeds (mm/min)
    M201 X500.00 Y500.00 Z25.00 E250.00 ; Set accelerations (mm/s^2)
    M906 X2000.00 Y2000.00 Z2000.00 E800.00 I30 ; Set motor currents (mA) and motor idle factor in per cent
    M84 S30 ; Set idle timeout

    ; Axis Limits
    M208 X0 Y0 S1 ; Set axis minima
    M208 X1000 Y1000 S0 ; Set axis maxima

    M208 Z0 S1 ; Set axis minima
    M208 Z700 S0 ; Set axis maxima

    ; Endstops
    M574 X1 S1 ;
    M574 Y1 S1 ; Set active high endstops

    ; Z-Probe
    M574 Z1 S1 ; Set endstops controlled by probe
    M558 P5 H5 F750 T4000 X0 Y0 Z1 ; Set Z probe type/mode 5. H=Dive Height. F=Speed the bed moves
    G31 P25 X-29.9974 Y6.5 Z2.4 ; Z probe trigger value, offset in relation to nozzle. And trigger height adjustment
    M557 X50:950 Y50:950 S50 ; Define mesh grid

    ; Heaters
    ;M305 P0 T100000 B4138 R4700 ; Set thermistor + ADC parameters for heater 0
    M305 P0 X151 T"J"
    M143 H0 S120 ; Set temperature limit for heater 0 to 120C
    M305 P1 T100000 B4138 R4700 ; Set thermistor + ADC parameters for heater 1
    M143 H1 S280 ; Set temperature limit for heater 1 to 280C
    M570 H1 P30 T15 ;allow extruder heater 30 seconds to get to temp....keep temp within 15 degrees
    M307 H7 A-1 C-1 D-1 ; Disable the 7th Heater to free up PWM channel 5 on the Duex board.

    ; Fans
    M106 P0 S0.3 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
    M106 P1 S1 I0 F500 H1 T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on

    ; Tools
    M563 P0 D0 H1 ; 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

    ; Automatic saving after power loss is not enabled

    ; Custom settings are not configured

  • Moderator

    @ajlapp said in M303 failure and other heater problems:

    M305 P0 X151 T"J"

    Where did you get T"J" ? Are you sure that's the thermocouple type?

  • That’s for the bed...yes it’s correct and it does work. I haven’t tried the bed heater yet but I know the thermocouple is working.

    For the extruder heater I’m now thinking that this is a power issue...the heater is likely a 24v unit...so I probably just need to juice the board voltage.


  • If its Volcano, then i bet the heater and termistor are from E3D. If so then:

    1. Make sure heater is for 12V and not 24V one. You can measure resistance of it, 12V one have 4-5 Ohms, when 24V one have much more (10+ at least).
    2. If its correct heater, then make sure its connected to heater block tight so contact between heater and block is good.
    3. Configure your termistor correctly. E3D uses Semitec 104GT termistor, so your M305 P1 T100000 B4388 C7.060000e-8 R4700 should look like this.

  • It’s definitely a 24v...so I’ll update that and my thermistor info.


  • Working! 24v and the thermistor line in config did the trick.

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