PT1000 thermistor configuration

[Arminas]

Hello all,

Short and simple question - is this line enough for PT1000 configuration:

M308 S1 P"temp1" Y"pt1000" ; configure sensor 1 as PT1000 on pin temp1

I have used a simple thermistor and there was additional T, B and C parameters in M308 line, but I don't see those in PT1000 configuration duet example

M308 S1 P"121.temp1" Y"PT1000" T100000 B4725 C7.060000e-8 A"Hotend"

[droftarts]

@Arminas said in PT1000 thermistor configuration:

Short and simple question - is this line enough for PT1000 configuration:

M308 S1 P"temp1" Y"pt1000" ; configure sensor 1 as PT1000 on pin temp1

Yes. You don't need the T, B and C parameters.

If you think they're not accurate, you may need to calibrate the Duet board ADCs, see https://docs.duet3d.com/User_manual/Connecting_hardware/Temperature_connecting_thermistors_PT1000#temperature-calibration-and-adc-tuning

Ian

[Arminas]

@droftarts I have two identical 3D printers (in hardware and electronics), and I have switched to a new toolhead for both printers. At first I have configured PT1000 thermistors on both printers like this:

M308 S1 P"121.temp1" Y"PT1000" T100000 B4725 C7.060000e-8 A"Hotend"

In other words, I just changed Y"thermistor" to Y"PT1000". One printer does not have any problems, another one randomly gets heater fault because of the wrong temp readings, but those wrong temp reading occurred only after I paused the printer to change the filament, not once during the printing process or heat-up. But today I could not start the print because of these heater faults, it says that temperature raises too slow (photo below):

So I double checked the configuration for PT1000 and I have noticed that I left T, B and C parameters. I have deleted them, PID tuned the hotend again, and successfully started the print. Will see how it goes.