Thermistor Semitec 104nt config problem

Branzo

Hi everybody

I am using a Duet 2 Ethernet to control a custom extruder.
At this stage I do not need any axis or extruding control just Heating and Temperature reading/control

I took heater cartridge and thermistor from a E3D TITAN AERO KIT
according to E3D website the themistor should be a Semitec 104NT

After configuring firmware accessing webinterface I get a temperature of -273.1 for tool 0

my cfg is set like this:

M308 S0 P"e0temp" Y"thermistor" T100000 B4725 C7.06e-8
M950 H0 C"e0heat" T0 ; create nozzle heater output on e0heat and map it to sensor 0
M307 H0 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit
M143 H0 S500 ; set temperature limit for heater 0 to 500C

; Tool 0
M563 P0 D0 H0 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

I am pretty sure that everything is wired correctly and I searchd for similar topic on this forum
like this one link text
but even trying to use different parameters combination my temperature reading is alway -273.1 °C

can anyone help me?
Thanks a lot, best regards

Branzo

@Branzo Ok little update, i changed config like this

M308 S0 P"bedtemp" Y"thermistor" T100000 B4725 C7.06e-8

and I get a temperature value

is it a problem of pin name?
are stil e0temp and e1temp valid pin names?

may be a hardware problem on the board? how to check it?

jay_s_uk

@Branzo all of those pin names are valid. post a photo to show where you've wired it to

apak

@Branzo said in Thermistor Semitec 104nt config problem:

M308 S0 P"e0temp" Y"thermistor" T100000 B4725 C7.06e-8
M950 H0 C"e0heat" T0 ; create nozzle heater output on e0heat and map it to sensor 0
M307 H0 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit
M143 H0 S500 ; set temperature limit for heater 0 to 500C

if you declared S0 and H0 has the heated bed, need to declare S1 and H1 as the heater

M308 S1 P"e0temp" Y"thermistor" T100000 B4725 C7.060000e-8 A"Nozzle E0" R4700 ; E3d configure sensor 0 as thermistor on pin e0temp
M950 H1 C"e0heat" T1                                        ; create nozzle heater output on e0heat and map it to sensor 2
M143 H1 S285 A2                                         ; disable temporarily H1 if temp exceeds 285C
M143 H1 S295 A0                                         ; heater fault H1 if temp exceeds 295C
M307 H1 B0 S1.00                                        ; disable bang-bang mode for heater  and set PWM limit
M570 H1 P10 T30                                      ; heater fault for 10 seg of 30ºC excursion

Branzo

@jay_s_uk I go to bury myself deep underground
checking wiring I have found out I was looking the board upsidedown and I wired the heaters to "always on fans" pin
I feel ashamed

so sorry guys now everything seems working