We currently have a self contained high voltage bed heater that uses a TCN4 that controls and displays bed temperature and does not connect to our duet wifi board. We had originally drilled a thermistor into the side of the bed and hooked to the Bed Temp input on the duet wifi board to be able to get some visual on the computer that the bed was on and working, but the temperature is not close to being correct.
The TCN4 uses a PT100 to read the bed temperature. We hoped we could connect to this at the TCN4 input and hook to the Bed Temp input of the duet wifi board and get an accurate reading, but we are getting around 540C reading when off and the ambient is around 23C
After some research I see that the PT100 needs an adapter board like we have on our two extruder PT100's but not sure how one would plug into the Bed Temp location, if this is even the issue, or maybe just a setting, any help would be much appreciated.

We are running Duet WiFi 1.02 or later + DueX5 version 2.05 (2019-12-13b1)

M305 P0 T100000 ; Set thermistor + ADC parameters for bed heat

Sorry, I tried to upload some pictures of what we had but keep getting an error !

@phaedrux we actually followed the
Fallback procedure #1 and got it back up and running again, thank you for your help

@phaedrux we actually followed the
Fallback procedure #1 and got it back up and running again, thank you for your help

@phaedrux we did get in and ran a M122, which comes back stuck in spinloop?

@phaedrux The lights look good
when connecting to the device we get
USB serial device (com4)
is this considered unknown device?

@sculpt-fabricator said in Connection lost, attempting to reconnect:

Everything has been working fine with our printer, we just changed out our extruder and noticed it was retracting when it should be extruding, made the change in the g code, the printer shut down like normal and restarted, but now just reads connecting on the Duet screen and the dashboard just reads connection lost, attempting to reconnect.

Printer is a Modex big 60
We are running Duet wifi and Duex 5 with the latest updates but cannot retrieve any info to give you exact versions

Any thoughts on what to try, besides turning off and unplugging power?

Thank you

We tried M552 S1 on the PanelDue but get no response on the screen, we also noticed when we click on the SD card icon, it doesn't show anything on the card, but if we bring the card over to the computer we can verify everything is still on the card. this would be the sd card from the duet wifi board

Everything has been working fine with our printer, we just changed out our extruder and noticed it was retracting when it should be extruding, made the change in the g code, the printer shut down like normal and restarted, but now just reads connecting on the Duet screen and the dashboard just reads connection lost, attempting to reconnect.

Printer is a Modex big 60
We are running Duet wifi and Duex 5 with the latest updates but cannot retrieve any info to give you exact versions

Any thoughts on what to try, besides turning off and unplugging power?

Thank you

@fcwilt

So I need change my config_probe.g Z setting back to
global.g_probe_z_trigger
like this

; config_probe.g
; config the probe and call the other files.g
 
M558 P9 C"^zprobe.in" H5 F120 T6000 A1 R1
M950 S0 C"duex.pwm5"
G31 P25 X0 Y-30 Z{global.g_probe_z_trigger} ; set Z probe trigger value, offset and trigger height (larger value is closer)G31 P500 X0 Y-30 Z1.73

@fcwilt
So I don't switch out build plates, Just run a lot of the same material.
I know he wanted that extra part to change out plates.
So how do I need to change that.

@fcwilt
We are running the z-offset calibration with the G30 in it
after we run the z probe calibration

@fcwilt

We are running the G30 in the
macro/z-offset Calibration

; Z-setup Macro
; setup Z distance

M300 S666 P666               ; beeo
 
M291 S3 R"Test Z Probe Trigger Height" P"Press OK to continue, or CANCEL to abort"
 
G28                          ; home all
 
G29 S2                       ; cancel mesh bed compensation
M290 R0 S0                   ; cancel baby stepping
 
G90                          ; absolute movements
 
; this complicated looking command computes the X and Y parameters needed to move the probe to the center of the bed
 
G1 X{((move.axes[0].max + move.axes[0].min) / 2) - sensors.probes[0].offsets[0]}, Y{((move.axes[1].max + move.axes[1].min) / 2) - sensors.probes[0].offsets[1]}, F1800
 
M300 S1111 P666              ; beep
 
M564 H1 S0                   ; ignore axis limits
 
M291 S2 R"Test Z Probe Trigger Height - Step 1" P"Place a paper sheet under the nozzle and raise the bed until slight friction can be noticed" Z1 ;
 
G92 Z0                       ; the nozzle should now be just touching the bed so set the logical Z position to match the physical Z position
 
M300 S666 P666               ; beep
 
M291 S2 R"Test Z Probe Trigger Height - Step 2" P"Please remove the paper sheet and wait for the bed-probing to begin" ;
 
G1 Z5 F200                   ; insure Z position will allow for probing
 
G30 S-1                      ; probe the bed and report the Z probe trigger height
 
M564 S1 H1                   ; respect axis limits
 
M291 S2 R"Test Z Probe Trigger Height - Step 3" P"Copy the reported height value on the G-Code console and paste it into the config_probe.g file"

@sculpt-fabricator
config.g

  ;Generated by Modix - 2.0
;Modix Big-60, Duex Expansion, Dual Printhead
; Configuration file for Duet WiFi (firmware version 3.3)


; General preferences_________________________________________________________
G21 														; dimentions in mm
G90                                             			; for X,Y,Z     use absolute coordinate values
M83                                             			; for E0,E1,etc use relative coordinate values
M111 S0 													; Debug off
M555 P2 													; Set output to look like Marlin
M575 P0 B57600 S2              								; communication parameters for USB serial
M575 P1 B57600 S1											; Set auxiliary serial port baud rate and require checksum (for PanelDue)

; Network_____________________________________________________________________
M550 P"Big 60"                         						; set printer name
M552 S1                                        				; enable (S1) networking (WiFi)
M586 S1 P1 ;T0                 								; enable (S1) FTP    (P1) Disable TLS (T0)
M586 S1 P2 ;T0                								; enable (S1) Telnet (P2) Disable TLS (T0)

; mode control variables _____________________________________________________
global g_probe_z_trigger = 1.752                            ; default - set as appropriate for the Z probe 
global g_z_home            = 5                  ; can be used to always move Z to known height
global g_z_datum_set       = false              ; can be used to prevent unneeded setting of Z=0 datum
 
global g_map_mode          = "300 point"        ; determines which kind of height map is created/loaded
global g_probe_mode        = "two consecutive"  ; determines if z proving used consecutive or averaging
global g_level_mode        = "4 point"          ; determines if 3 or 4 points are used for leveling
 
global g_print_beg_prime   = 10                 ; default - set desired in filament config.g
global g_print_beg_retract = 0                  ; default - set desired in filament config.g
 
global g_print_end_retract = 0                  ; default - set desired in filament config.g
global g_print_end_mode    = "heat off"         ; determines if heaters are turned off when print is done
 

; Drives_________________________________________________________________________

;Main board______________________________________________________________________
M569 P0 S0                                                          ; Physical drive 0 . X1
M569 P1 S1                                                          ; Physical drive 1 . X2
M569 P3 S1                                                       	; Physical drive 3 . Main Extruder
M569 P4 S0                                                       	; Physical drive 4 . Secondary Extruder									
;Duex5 board_____________________________________________________________________
M569 P5 S0                                                       	; Physical drive 5 . Y
M569 P6 S0                                                       	; Physical drive 6 . Z1 (-190 , 664) 
M569 P7 S0                                                       	; Physical drive 7 . Z2 (-190, -64) 
M569 P8 S0                                                       	; Physical drive 8 . Z3 (680 , -64) 
M569 P9 S0                                                       	; Physical drive 9 . Z4 (680 , 664) 

;Settings_________________________________________________________
M584 X0:1 Y5 Z6:7:8:9  E3:4 P3								   	    ; Driver mapping                                                 


;___________________________________________________________________
M350 X16 Y16 I1  		                            				; Configure microstepping with interpolation                     
M350 Z16 E16:16 I0              		                			; Configure microstepping without interpolation

M92 X100.00 Y100.00 Z2000.00 E686:700       				        ; Set steps per mm                                                

M566 X300 Y500 Z100.00 E120.00:120.00  P1               		    ; Set maximum instantaneous speed changes (mm/min)                
M203 X18000.00 Y18000.00 Z300.00 E1200.00:1200.00           		; Set maximum speeds (mm/min)                                     
M201 X1000 Y1000 Z120.00 E250.00:250.00                  			; Set accelerations (mm/s^2)                                      
M204 P500                                     			            ; Set print and travel accelerations  (mm/s^2)
M906 X1800 Y1800.00 E1270:1270  I40 					        	; Set motor currents (mA) and motor idle factor in per cent (E1270 per dyze)   
M906 Z1800.00 I50 													; Set motor currents (mA) and motor idle factor in per cent
M84 S100                                          					; Set idle timeout - 100 seconds

; Axis Limits

M208 X0 Y0 Z-0.5 S1                               			 	    ; set axis minima
M208 X580 Y545 Z630 S0                          					; set axis maxima 580;580

; Endstops

M574 X1 S1 P"xstop + e0stop"                            	; configure switch-type (e.g. microswitch) endstop for low end on X via pin xstop
M574 Y2 S1 P"ystop"                            				; configure switch-type (e.g. microswitch) endstop for low end on Y via pin ystop


; Z-Probe


;M558 P9 C"^zprobe.in" H5 F120 T6000 A1 R1  					; set Z probe type to bltouch and the dive height + speeds
;M950 S0 C"duex.pwm5"										; set probe pin
M98 P"config_probe.g"
M556 S50 X0 Y0 Z0		                               		; set orthogonal axis compensation parameters woher kommt der test wie wurde der Winkel bestimmt Unklar!
M376 H10													; stop z-leveling after 10 layers

; Heaters___________________________________________________________
M140 H-1                                       				; disable heated bed (overrides default heater mapping)

macro/g_probe_z_trigger

set global.g_probe_z_trigger = 1.752 ; set the variable
 
M98 P"config_probe.g"              ; configure the probe using the new value
 
; I put this G31 here just to show the current settings - it is optional
; You can provide visual feedback some other way, say, using an M291 command
 
G31

mesh.g

M98 P"config_probe.g"        ; insure probe is using most recent configuration values
 
G29 S2                       ; cancel mesh bed compensation
M290 R0 S0                   ; cancel baby stepping
 
G90                          ; absolute moves
 
							 ; --- set Z=0 datum which is needed for creating a heightmap
 
G1 Z5 F99999                 ; insure Z starting position is high enough to avoid probing errors
 
G1 X270 Y270                 ; move probe to center of bed - set values aaa and bbb as appropriate
G30                          ; do single probe which sets Z to trigger height of Z probe
 
M557 X0:580 Y0:510 S29:25.5       ; define mesh grid 420 points S58       			
G28
G29 S0                       ; probe bed and create height map

homeall.g

; homeall.g
; called to home all axes

G91                    					; relative positioning


G1 H2 Z5 F200          		            ; lift Z relative to current position
G1 H1 X-605 Y605 F3000 		            ; move quickly to X and Y axis endstops and stop there (first pass)     
G1 H2 X5 Y-5 F600      		            ; go back a few mm
G1 H1 X-605 Y605 F600  		            ; move slowly to X and Y axis endstops once more (second pass)           
                                                      
G90                    		            ; absolute positioning
M98 P"config_probe.g"
G30                    		            ; home Z by probing the bed
G1

macro/z-offset calibration

; Z-setup Macro
; setup Z distance

M300 S666 P666               ; beeo
 
M291 S3 R"Test Z Probe Trigger Height" P"Press OK to continue, or CANCEL to abort"
 
G28                          ; home all
 
G29 S2                       ; cancel mesh bed compensation
M290 R0 S0                   ; cancel baby stepping
 
G90                          ; absolute movements
 
; this complicated looking command computes the X and Y parameters needed to move the probe to the center of the bed
 
G1 X{((move.axes[0].max + move.axes[0].min) / 2) - sensors.probes[0].offsets[0]}, Y{((move.axes[1].max + move.axes[1].min) / 2) - sensors.probes[0].offsets[1]}, F1800
 
M300 S1111 P666              ; beep
 
M564 H1 S0                   ; ignore axis limits
 
M291 S2 R"Test Z Probe Trigger Height - Step 1" P"Place a paper sheet under the nozzle and raise the bed until slight friction can be noticed" Z1 ;
 
G92 Z0                       ; the nozzle should now be just touching the bed so set the logical Z position to match the physical Z position
 
M300 S666 P666               ; beep
 
M291 S2 R"Test Z Probe Trigger Height - Step 2" P"Please remove the paper sheet and wait for the bed-probing to begin" ;
 
G1 Z5 F200                   ; insure Z position will allow for probing
 
G30 S-1                      ; probe the bed and report the Z probe trigger height
 
M564 S1 H1                   ; respect axis limits
 
M291 S2 R"Test Z Probe Trigger Height - Step 3" P"Copy the reported height value on the G-Code console and paste it into the config_probe.g file"