What is "Heater 0"



  • During power up I'm receiving the message "Warning: Heater 0 appears to be over-powered. If left on at full power, its temperature is predicted to reach 265C." What is "Heater 0"? I have found "E0 HEAT" to "E6 HEAT" and the bed heater is marked "BED HEAT". All LED's are off for these devices.



  • @racenviper You should only see messages like that when you run heater tuning. Do you by by chance have any M303 commands in your config.g file or config-overide.g if you use one? If so delete it.

    For info, Heater 0 is usually the bed, Heater 1 is usually assigned to the first hot end etc.



  • do not have a M303 in the config.g nor do I have a config-overide.g file.



  • ; Configuration file for My Printer
    ; Communication and general
    M111 S0 ; Debug off
    M550 PRailCore ; Machine name and Netbios name (can be anything you like)
    ;M551 Pmyrap ; Machine password (used for FTP)
    ;*** If you have more than one Duet on your network, they must all have different MAC addresses, so change the last digits
    M540 P0xBE:0xEF:0xDE:0xAD:0xFE:0xEE ; MAC Address
    ;*** Wifi Networking
    M552 S1 ; Enable WiFi
    M555 P2 ; Set output to look like Marlin
    M575 P1 B57600 S1 ; Comms parameters for PanelDue

    G21 ; Work in millimetres
    G90 ; Send absolute coordinates...
    M83 ; ...but relative extruder moves

    ; Axis and motor configuration
    M667 S1 ; CoreXY mode

    M584 X0 Y1 Z5:6:7 E3:4:8:9 ; Map Z to drivers 5, 6, 7. Define unused drivers 3,4,8 and 9 as extruders
    M569 P0 S0 ; Drive 0 goes forwards (change to S0 to reverse it) X stepper (Rear)
    M569 P1 S1 ; Drive 1 goes backwards Y Stepper (Front)
    M569 P2 S1 ; Drive 2 goes forwards Unused
    M569 P3 S0 ; Drive 3 goes forwards Extruder
    M569 P4 S1 ; Drive 4 goes forwards Extruder (unused)
    M569 P5 S0 ; Drive 5 goes backwards Front Left Z
    M569 P6 S0 ; Drive 6 goes backwards Rear Left Z
    M569 P7 S0 ; Drive 7 goes backwards Right Z

    ;Leadscrew locations
    M671 X-10:-10:333 Y22.5:277.5:150 S7.5 ;Front left, Rear Left, Right S7.5 is the max correction - measure your own offsets, to the bolt for the yoke of each leadscrew

    M350 X16 Y16 Z16 E16 I1 ; set 16x microstepping for axes& extruder, with interpolation
    M574 X1 Y1 Z0 S1 ; set homing switch configuration (x,y at min, z at max) IF YOU NEED TO REVERSE YOUR HOMING SWITCHES CHANGE S1 to S0
    M906 X1400 Y1400 Z1000 E1250 I60 ; Set motor currents (mA)
    M201 X3000 Y3000 Z20 E1000 ; Accelerations (mm/s^2)
    M203 X24000 Y24000 Z900 E3600 ; Maximum speeds (mm/min)
    M566 X1000 Y1000 Z30 E20 ; Maximum jerk speeds mm/minute
    M208 X290 Y290 Z280 ; set axis maxima and high homing switch positions (adjust to suit your machine)
    M208 X0 Y0 Z-0.5 S1 ; set axis minima and low homing switch positions (adjust to make X=0 and Y=0 the edges of the bed)
    M92 X200 Y200 Z1600 E837 ; steps/mm

    ; Thermistors
    M305 P0 T100000 B4240 R4700 H0 L0 ; Put your own H and/or L values here to set the bed thermistor ADC correction
    M305 P1 T100000 B4240 R4700 H0 L0 ; Put your own H and/or L values here to set the first nozzle thermistor ADC correction

    M307 H0 A240.3 C608.7 D8.2 S1.00 V24.1 B0 ; Bed Heaters
    M307 H1 A270.7 C90.4 D6.7 B0 S1.0 ;Heater 1 model
    M570 S360 ; Hot end may be a little slow to heat up so allow it 180 seconds
    M143 S285

    ; Fans
    M106 P0 H-1 ; disable thermostatic mode for fan 0
    M106 P1 H-1 ; disable thermostatic mode for fan 1
    M106 P2 H-1
    M106 P0 S0 ; turn off fans
    M106 P1 S0
    M106 P2 S0

    ; Tool definitions
    M563 P0 D0 H1 ; Define tool 0
    G10 P0 S0 R0 ; Set tool 0 operating and standby temperatures
    ;*** If you have a single-nozzle build, comment the next 2 lines
    ;M563 P1 D1 H2 ; Define tool 1
    ;G10 P1 S0 R0 X0 Y17 ; Set tool 1 operating and standby temperatures

    ; Z probe and compensation definition
    ;*** If you have a switch instead of an IR probe, change P1 to P4 in the following M558 command
    ; IR PRobe - uncomment the following 2 lines if you have a and IR Probe, and comment out the BLTouch section below
    ;M558 P1 X0 Y0 Z1 ; Z probe is an IR probe and is not used for homing any axes
    ;G31 X0 Y30 Z2.00 P500 ; Set the zprobe height and threshold (put your own values here)

    ;BLTouch - comment out the following 3 lines if using a IR Probe
    M307 H3 A-1 C-1 D-1
    M558 P9 X0 Y0 Z1 H5 F50 T6000 A5 S0.02
    G31 X2 Y42 Z2.65 P25 ; Customize your offsets appropriately - do a paper test, and put the probed value in the Z value here

    M208 S1 Z-0.2 ; set minimum Z
    ;
    T0 ; select first hot end


  • administrators

    It's the M307 command that provokes that message. Heater 0 is the bed heater output. What it's telling you is that you ought to use a thermal cutout to guard against over temperature in the event of a control failure.



  • @dc42 said in What is "Heater 0":

    It's the M307 command that provokes that message. Heater 0 is the bed heater output. What it's telling you is that you ought to use a thermal cutout to guard against over temperature in the event of a control failure.

    This is strange. I do have a somewhat powerful bed heater and I do get that message when I run heater tuning, but I don't ever get that message on power up like the OP. Is it a very recent firmware thing? I'm running 2.03 beta2.


  • administrators

    @deckingman said in What is "Heater 0":

    This is strange. I do have a somewhat powerful bed heater and I do get that message when I run heater tuning, but I don't ever get that message on power up like the OP. Is it a very recent firmware thing? I'm running 2.03 beta2.

    Unless you connect to the USB port, you won't see messages that occur during the start up process, because there is nowhere for them to go.



  • @dc42 said in What is "Heater 0":

    @deckingman said in What is "Heater 0":

    This is strange. I do have a somewhat powerful bed heater and I do get that message when I run heater tuning, but I don't ever get that message on power up like the OP. Is it a very recent firmware thing? I'm running 2.03 beta2.

    Unless you connect to the USB port, you won't see messages that occur during the start up process, because there is nowhere for them to go.

    Ahh OK. So all the OP needs to do is disconnect his USB cable?



  • Interesting, I do have a high powered heatbed, it is connected through a SSR. It is switched with the "Bed Heat" output. I have nothing connected to the USB port. Having a Duex conncected triggering the USB port?


  • administrators

    Where are you seeing the message?



  • On the PanelDue console before the WiFi is connected.



  • @racenviper said in What is "Heater 0":

    On the PanelDue console before the WiFi is connected.

    That may be a clue as to why you see the message and I don't - I have a Duet Ethernet rather than the WiFi version. Perhaps it's something specific to the WiFi version - possibly because of some delay in establishing a connection whereas Ethernet connects faster? Just a guess...



  • Would like to add that I'm using the 4-wire connection on the PanelDue. The "Conn_SD" is not connected to the PanelDue.



  • I see these messages on my PanelDue as well at startup for my bed heater. No USB connected. DuetWifi. It doesn't seem to display at every power up though.



  • "DC42" stated that this is caused by the use of the USB port, since I'm not using the USB port on startup. I believe it is the PanelDue that is triggering the message by using the serial comm of the Duet. It's just a guess. I see it on every powerup, I just can not get the wifi to connect on every powerup.


  • administrators

    @racenviper said in What is "Heater 0":

    "DC42" stated that this is caused by the use of the USB port, since I'm not using the USB port on startup. I believe it is the PanelDue that is triggering the message by using the serial comm of the Duet. It's just a guess. I see it on every powerup, I just can not get the wifi to connect on every powerup.

    The message is generated at power up, however it will not be seen unless either USB is connected, or PanelDue has succeeded in connecting to the Duet before the message is produced.

    If the WiFi doesn't connect on every power up, that suggests low signal strength and/or interference. When it does connect, what signal strength does it show in the M122 report?



  • -40dbm it is 15 feet from the access point, Ubiquiti AC Pro.


  • administrators

    @racenviper said in What is "Heater 0":

    -40dbm it is 15 feet from the access point, Ubiquiti AC Pro.

    That's a good signal strength, so it should connect unless there is strong interference from other devices (cordless telephones, baby monitors, microwave ovens etc.). You may wish to try setting your wifi router to a different wifi channel.


 

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