Reading negative temperature and N/A temp

[jay_s_uk]

You could try remapping the bed thermistor to P2 and connecting to the e1 temp header and see if you get a reading

[johny]

I did it, no luck, still same error :S
I unplugged a thermistor from another printer to check it if was the thermistor and the same result.

[A Former User]

(Don't think there is one)

[johny]

@bearer said in Reading negative temperature and N/A temp:

(Don't think there is one)

Well i measure between the vssa and gnd and i got 3 ohms.
I just checked that my heat bed had a short between the +12v and gnd but i got no readings even before plugging it.

[blt3dp]

What version of the firmware does M115 report? Might be useful in troubleshooting.

[johny]

@blt3dp said in Reading negative temperature and N/A temp:

M115

M115
FIRMWARE_NAME: RepRapFirmware for Duet 2 WiFi/Ethernet FIRMWARE_VERSION: 3.0 ELECTRONICS: Duet WiFi 1.02 or later FIRMWARE_DATE: 2020-01-03b3

[blt3dp]

@johny said in Reading negative temperature and N/A temp:

FIRMWARE_VERSION: 3.0

That's why you're not getting a reading, you need have to define the pin that it's using.

[jay_s_uk]

@johny

Use

; Bed Heater
M308 S0 P"bedtemp" Y"thermistor" T100000 B3950 C0 R4700				; Set thermistor + ADC parameters for heater 0
M950 H0 C"bedheat" T0                               		; create bed heater output on bedheat and map it to sensor 0
M307 H0 B0 S1.00
M140 H0
M143 H0 S130                               					; Set temperature limit for heater 0 to 120C

; Extruder Heater
M308 S0 P"eotemp" Y"thermistor" T100000 B4275 C7.060000e-8  R4700							;
M950 H1 C"e0heat" T1                                		; create nozzle heater output on e0heat and map it to sensor 1
M143 H1 S400     

[blt3dp]

@jay_s_uk said in Reading negative temperature and N/A temp:

@johny

Use

; Bed Heater
M308 S0 P"bedtemp" Y"thermistor" T100000 B3950 C0 R4700				; Set thermistor + ADC parameters for heater 0
M950 H0 C"bedheat" T0                               		; create bed heater output on bedheat and map it to sensor 0
M307 H0 B0 S1.00
M140 H0
M143 H0 S130                               					; Set temperature limit for heater 0 to 120C

; Extruder Heater
M308 S0 P"eotemp" Y"thermistor" T100000 B4275 C7.060000e-8  R4700							;
M950 H1 C"e0heat" T1                                		; create nozzle heater output on e0heat and map it to sensor 1
M143 H1 S400     

Yep, use that. In fact, looks like you're either modifying or creating a new config file based off of a RRF2x one. You might want to run through the web configurator and generate one for RRF3

[johny]

I used and got a different error!

[johny]

[blt3dp]

Most likely your tool settings. Update these secttions.

; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B4267 C7.06e-8 ; 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
M143 H0 S130                                            ; set temperature limit for heater 0 to 130C
M307 H0 B0 S1.00                                        ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0                                                 ; map heated bed to heater 0
M308 S1 P"e0temp" Y"thermistor" T100000 B4267 C7.06e-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
M143 H1 S275                                            ; set temperature limit for heater 1 to 275C
M307 H1 B0 S1.00                                        ; disable bang-bang mode for heater  and set PWM limit

; Tools
M563 P0 D0 H1 F0                                        ; 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

[johny]

@blt3dp said in Reading negative temperature and N/A temp:

; Tools
M563 P0 D0 H1 F0 ; 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

And magic!!!! i get readings!!!! thank you a lot m8! i was starting to get crazy with it! need to check if it heats up!
thank you!

[johny]

It heats!!!! Thank you, i rly appreciate it!