kmarty
commented
2 months ago Connecting PT1000 to TH0 pin, i.e. the same way as NTC thermistor, is perfectly valid option. The pullup_resistor might be off, since TH0 (PF4) has 4.7k pull-up thus this setting is unnecessary since value 4700 is Klipper default.
But the part:
sensor_type: PT1000
sensor_pin: PF4is ok. It is one of the options how to use PT1000 (not PT100, which unconditionally requires MAX chip. For PT1000, the MAX chip is just optional)
HelgeKeck
What happened
Currently the only settings available extruder temperature sensor is "Hotendthermistor".
But it doesn't work when using PT1000, as it is not setting the proper klipper configuration.
On Octopus Pro, for [extruder] , It is setting :
heater_pin: PA0 sensor_type: PT1000 sensor_pin: PF4 pullup_resistor: 3700
what is not correct.
what's more "pullup_resistor:3700" prevent any override in printer.cfg because klipper doesn't support this setting for MAX31865
What did you expect to happen
On Octopus Pro, for [extruder], It should set :
sensor_type: MAX31865 sensor_pin: PF8 spi_software_sclk_pin: PA5 spi_software_mosi_pin: PA7 spi_software_miso_pin: PA6 spi_speed: 4000000 rtd_nominal_r: 1000 rtd_reference_r: 4300 rtd_num_of_wires: 2 rtd_use_50Hz_filter: True
How to reproduce
Vcore 3 Octopus Pro V1.1 All latest version
Additional information
I would suggest to add in the UI a hotend tempreratur sensor selectbox , to allow the user to chosse the proper sensor chip. And then it would allow to restrict the current Thermistor select box only to valid values for the selected chip.