Rat Rig Community [Unofficial]•3mo ago

PT1000 Thermistor setup.

Trying to understand using a PT1000 Thermistor but between the RatOS install guide and the EBB36 V1.2 manual. I am conflicted on if I should be using the same pins as the standard NTC104 thermistor or the ones connected to the MAX 31865 chip.

Solution:

Use the standard 2p thermistor port. Then in user overrides in printer.cfg do:

[extruder]
sensor_type: PT1000

[extruder]
sensor_type: PT1000

...

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4 Replies

YouvBeenThumped•3mo ago

Solution

miklschmidt•3mo ago

Use the standard 2p thermistor port. Then in user overrides in printer.cfg do:

[extruder]
sensor_type: PT1000

[extruder]
sensor_type: PT1000

I recommend putting in the PT1000 jumper (see the ebb manual) for increased accuracy, and then it's this:

[extruder]
sensor_type: PT1000
pullup_resistor: 2200

[extruder]
sensor_type: PT1000
pullup_resistor: 2200

miklschmidt•3mo ago

MAX31685 really only makes sense for PT100 and you'd be very hard pressed to find a practical difference between the two

YouvBeenThumped•3mo ago

So I just had the Pullup resistance wrong. 2200 vs 4700... BTT doing things weird again. Well now that Beacon and Dragon UHF are installed and hopefully working well... I won't need to mess with Klipper again for a while after tuning again. Thanks again @miklschmidt

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PT1000 Thermistor setup.