To make a fairly long story short, we have a Modix Big-60 printer with dual extruders and an AC powered heatbed.
Duet 2 wifi board with duex expansion, firmware 3.4.5
The modix comes standard with the ac bed heater attached to it's own temp control. I changed this to use the SSR that the stock temp control was firing, to be fired from the duet board. The stock silicone bed uses a K sensor, so I also added the thermocouple daughter board.
If I have extruder 0 and 1 on standby, set to a temp of 100c, and the bed set to 60c, I will get a sensor open circuit fault on the bed k sensor. If I turn off Either extruder, the open circuit fault won't return. It doesn't make a difference what I set the standby temps too, just that all 3 heaters are firing at once.
I originally ran a 4 conductor shielded cable down for the bed heater and sensor, but have since changed that to 2x 2 conductor shielded cables to omit the possibility of noise messing something up. The shielding is grounded to the ground pin on the duex for the duex's temp daughterboard(not installed)
Does anyone have any thoughts beyond a loose wire? Is this indicative of a loose/overheating/inadequate ground? Last year I had to replace the duet 2 board as it had failed, so i did have to redo all of the wiring. The printer has since printed many prints successfully, but with the problems I've outlined above.
Thanks for any assistance or thoughts anyone can give me on this. Hope I included enough info.
; Modix Big-60, Duex Expansion, IDEX
; Configuration file for Duet WiFi (firmware version 3.4.5)
; Generated by Modix - Version 3.4.5 Config C
global config_version = "Version 3.4.5 Config C"
global generation = 4 ; generation 4 printer
global printhead = 1 ; Griffin printhead
global expansion = 1 ; Duex expansion board is installed
global pausetime = 0 ; record pauzing time
global fan_0_speed = 0 ; Used to store the fan0 speed
global fan_1_speed = 0 ; Used to store the fan1 speed
global filamentswitch = 0 ; filament switch disabled (edited)
global printheads = 2 ; dual extruder
global changer_count = 0 ; Counter for tool changer continous.
global idex = 1 ;idex setup
global toolstate = 0 ; used to define active tool
global errorfix = 0.300
; General preferences_________________________________________________________
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M555 P2 ; Set output to look like Marlin
M575 P1 B57600 S1 ; Set auxiliary serial port baud rate and require checksum (for PanelDue)
; Network_____________________________________________________________________
M550 P"Big 60 V4 - IDEX" ; set printer name
;M551 P"MODIX3D" ; Set password (optional)
M98 P"config_networking.g" ; enable network
G4 P300 ; wait 300ms
;M552 P0.0.0.0 ; Uncomment this command for using Duet Ethernet board
; Drives_________________________________________________________________________
;Main board______________________________________________________________________
M569 P0 S1 ; Physical drive 0. X-B-M
M569 P1 S0 ; Physical drive 1. X-F-M
M569 P2 S0 ; Physical drive 2. U Secondary
M569 P3 S1 ; Physical drive 3. E0-Extruder.
M569 P4 S0 ; Physical drive 4. E1-Extruder.
;Duex5 board_____________________________________________________________________
M569 P5 S0 ; Physical drive 5. Y
M569 P6 S1 ; Physical drive 6. Z-Back-Left (ZBL)
M569 P7 S1 ; Physical drive 7. Z-Front-Left (ZFL)
M569 P8 S1 ; Physical drive 8. Z-Front-Right (ZFR)
M569 P9 S1 ; Physical drive 9. Z-Back-Right (ZBR)
;Settings_________________________________________________________
M584 X0:1 Y5 U2 Z6:7:8:9 E3:4 P4 ; Driver mapping
M671 X-185:-185:668:668 Y668:-46:-46:668 S30 ; Anticlockwise
;___________________________________________________________________
M350 X16 Y16 Z16 U16 E16:16 I1 ; Configure microstepping with interpolation
M92 X80 Y80 U80 Z2000 E400:400 ; Set steps per mm
M566 X500 Y500 U500 Z30 E2500:2500 P1 ; Set maximum instantaneous speed changes (mm/min)
M203 X18000 Y18000 U18000 Z400 E6000:6000 ; Set maximum speeds (mm/min)
M201 X3000 Y3000 U3000 Z240 E1000:1000 ; Set accelerations (mm/s^2)
M204 P1000 T3000 ; Set print and travel accelerations (mm/s^2)
M906 X1800 Y1800 U1800 Z1800 E1000:1000 I50 ; Set motor currents (mA) and motor idle factor in per cent
M84 S100 ; Set idle timeout - 100 seconds
; Axis Limits
M208 X0 Y0 U0 Z-2 S1 ; set axis minima
M208 X600 Y600 Z600 S0 ; set axis maxima
M98 P"config_probe_offset_U.g" ; Load secondary axis offsets
; Endstops
M574 X1 S1 P"duex.e5stop + duex.e6stop" ; configure switch-type (e.g. microswitch) endstop for low end on X via pin e5stop + e6stop
M574 Y1 S1 P"duex.e4stop" ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin e4stop
M574 U2 S1 P"duex.e3stop" ; configure switch-type (e.g. microswitch) endstop for low end on Secondary via pin e3stop
; Automatic Z Offset Calibration____________________________________
M574 Z1 S1 P"!duex.e2stop" ; configure switch-type for Automatic z-offset
; Z-Probe
M558 P9 C"zprobe.in" H4 F180 T12000 A1 R0.5 ; BLTouch probing settings
M950 S0 C"duex.pwm5" ; sets the BLTouch probe
M376 H10 ; Height (mm) over which to taper off the bed compensation
G31 P500 X0 Y32.4 ; BLTouch X and Y offset
M557 X{move.axes[0].min + sensors.probes[0].offsets[0] + 35, move.axes[0].max + sensors.probes[0].offsets[0] - 35} Y{move.axes[1].min + sensors.probes[0].offsets[1] + 35, move.axes[1].max + sensors.probes[0].offsets[1] - 35} P9:9
; The M557 is used to define the mesh grid area. It uses the P parameter to set the amount of probing points. P10:10 would be a 10x10 grid. Supports up to a 21x21 grid.
M98 P"config_probe.g" ; Load the Z-offset from the config_probe.g file
; The Z_offset value is now set in config_probe.g, not in config.g
; Adjust the values there, do not adjust anything here.
; Heaters___________________________________________________________
;M140 H-1 ; disable heated bed (overrides default heater mapping)
M308 S12 P"spi.cs2" Y"thermocouple-max31856" A"Bed Temp" F60 ; enables pt1000 bed temp sensor on pin bedtemp
M950 H2 C"bedheat" T12 Q1; create bed heater output on bedheat and map it to sensor 12
M307 H2 R0.264 K0.231:0.000 D2.90 E1.35 S1.00 B0 ; enable pwm mode with these settings
M140 H2 ; map heated bed to heater 2
M143 H2 S120 ; set temperature limit for heater 0 to 120C
;E0_________________________________________________________________
;M308 S0 P"e0temp" Y"thermistor" T100000 B4725 ; configure sensor 0 as thermistor on pin e0temp
;M308 S0 P"spi.cs1" Y"rtd-max31865" ; Configure sensor 0 as PT100 via the daughterboard
M308 S0 P"e0temp" Y"pt1000" ; Configure sensor 0 as PT1000 on pin e0temp
M950 H0 C"e0heat" T0 ; create nozzle heater output on e0heat and map it to sensor 0
M98 P"PID_tune_E0.g" R1 ; PID calibration
M143 H0 S300 ; set temperature limit for heater 0 to 285C
;E1_________________________________________________________________
;M308 S1 P"e1temp" Y"thermistor" T100000 B4725 ; configure sensor 1 as thermistor on pin e1temp
;M308 S1 P"spi.cs2" Y"rtd-max31865" ; Configure sensor 1 as PT100 via the daughterboard
M308 S1 P"e1temp" Y"pt1000" ; Configure sensor 1 as PT1000 on pin e1temp
M950 H1 C"e1heat" T1 ; create nozzle heater output on e1heat and map it to sensor 1
M98 P"PID_tune_E1.g" R1 ; PID calibration
M143 H1 S300 ; set temperature limit for heater 1 to 285C
;DHT Sensor on Temperature Daughterboard SPI CS6 pin
;M308 S10 P"0.spi.cs6" Y"dht22" A"Chamber Temp" ; define DHT22 temperature sensor
;M308 S11 P"S10.1" Y"dht-humidity" A"Chamber Hum[%]" ; Attach DHT22 humidity sensor to secondary output of temperature sensor
; Fans______________________________________________________________
M950 F0 C"fan0" Q500 ; create fan 0 on pin fan0 and set its frequency
M106 P0 S0 H-1 C"Primary blower fan" ; 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 S0 H-1 C"Secondary blower fan" ; set fan 1 value. Thermostatic control is turned on
M950 F3 C"duex.fan5" Q500 ; create fan 3 on pin fan5 and set its frequency
M106 P3 S255 H0 T45 ; set fan 3 value. Thermostatic control is turned on
M950 F4 C"duex.fan6" Q500 ; create fan 4 on pin fan6 and set its frequency
M106 P4 S255 H1 T45 ; set fan 4 value. Thermostatic control is turned on
; LED______________________________________________________________
M950 F2 C"duex.fan7" Q500 ; create LED on pin fan7 and set its frequency
M106 P2 S0 H-1 C"LED Primary" ; Disable fan channel for LED
M950 F5 C"duex.fan8" Q500 ; create LED ENC on pin fan8 and set its frequency
M106 P5 S0 H-1 C"LED ENC" ; Disable fan channel for LED
M950 F6 C"duex.fan4" Q500 ; create LED Secondary on pin fan4 and set its frequency
M106 P6 S0 H-1 C"LED Secondary" ; Disable fan channel for LED
M106 P5 S255 ; Enclosure LED on by default
M106 P2 S255 ; Secondary LED on by default
M106 P6 S255 ; Primary LED on by default
; Tools______________________________________________________________
;T0_________________________________________________________________
M563 P0 S"E0 Primary" D0 H0 F0 ; define tool 0
G10 P0 X0 Y0 Z0 ; set tool 0 axis offsets
G10 P0 S210 R180 ; set initial tool 0 active and standby temperatures to 210 and 180c by default
;T1_________________________________________________________________
M563 P1 S"E1 Secondary" D1 H1 F1 Y3 ; define tool 1
G10 P1 X0 Y0 Z-3 ; set tool 1 axis offsets
M98 P"config_probe_secondary.g" ; Set secondary Z-Offset
M98 P"config_probe_offset_X.g" ; Set secondary Z-Offset
G10 P1 S210 R180 ; set initial tool 1 active and standby temperatures to 210 and 180c by default
; Automatic power saving____________________________________________
M911 S22.0 R23.5 P"M913 X0 Y0 U0 G91 M83 G1 Z3 E-5 F1000" ; Set voltage thresholds and actions to run on power loss. Power Failure Pause
; Primary hotend Clog detector__________________________________________________
M591 D0 P7 C"e0stop" S1 L3.33 E15 R08:400 ; Clog Detector E0 [Add-On]
;Secondary hotend Clog detector__________________________________________________
M591 D1 P7 C"e1stop" S1 L3.33 E15 R08:400 ; Clog Detector E1 [Add-On]
; Crash detector__________________________________________________
M950 J2 C"zstop" ; create Input Pin 2 on pin E4 to for M581 Command.
M581 P2 T0 S0 R0 ; Crash Detector [Add-On]
; Emergency stop button__________________________________________________
M950 J3 C"ystop" ; create Input Pin 2 on pin ystop to for M581 Command.
M950 J4 C"xstop" ; create Input Pin 2 on pin xstop to for M581 Command.
M581 P3 T0 S1 R0 ; Emergency stop [Add-On]
M581 P4 T0 S1 R0 ; Emergency stop, [Add-On]
; Enable Logging__________________________________________________
M929 P"eventlog.txt" S1 ; start logging warnings to file eventlog.txt
M501
