BBT SB2209 PT1000 problem

[Geosphere]

Hello,

I recently built a Voron 2.4 350mm from a kit.

I added some upgrades as I was building it, including a Voron TAP a BigTreeTech (BTT) SKR SB2209 with CANbus. I also upgraded to a stealthburner extruder and used an old Dragon hotend. It's been running okay, but I feel the hotend has been running too hot. Therefore, I upgraded to a Rapodo V2 HF hotend with a PT1000.

I'm having a hard time getting the new PT1000 to work; I get the error message "MCU 'EBBCan' shutdown: ADC out of range." I did change the sensor_type to PT1000:

sensor_type: PT1000
sensor_pin: EBBCan:PA4
#spi_bus: spi1
#rtd_nominal_r: 100
#rtd_reference_r: 430
#rtd_num_of_wires: 2

The switches on the SB2204 are set as per the GitHub directions, and the 2-wire PT1000 is plugged into the middle 2 pins of the 4-pin header.

The settings before I had were:

sensor_type: MAX3186
sensor_pin: EBBCan:PA4
min_temp: 0
max_temp: 320
spi_bus: spi1
rtd_nominal_r: 100
rtd_reference_r: 430
rtd_num_of_wires: 2

I appreciate any guidance you can provide in resolving this issue.

 

[fatboy1020]

did you change the dip switches to match a 2-wire pt1000

 

[deremka]

Here's my working config for a PT1000 on a BTT 2209 (RPI 2040) if you use the MAX31865 Setup:. This isn't stricly necessary for a PT1000 however, you could also use the Thermistor Port instead...

[extruder]
step_pin: EBBCan:gpio18
dir_pin: EBBCan:gpio19
enable_pin: !EBBCan:gpio17
## G2E
gear_ratio: 9:1
microsteps: 64
# Serie:
# rotation_distance: 47.088
# Gemessen
rotation_distance: 47.5588

heater_pin: EBBCan:gpio7

# for the Thermistor Port
#sensor_type: PT1000
#sensor_pin: EBBCan:gpio27

sensor_type: MAX31865
sensor_pin: EBBCan:gpio9
spi_software_sclk_pin: EBBCan:gpio10
spi_software_mosi_pin: EBBCan:gpio8
spi_software_miso_pin: EBBCan:gpio11
## for PT100
# rtd_nominal_r: 100
# rtd_reference_r: 430
## for PT1000
rtd_nominal_r: 1000
rtd_reference_r: 4300
rtd_num_of_wires: 2
rtd_use_50Hz_filter: True

 

[papparazzi]

thanks @deremka , this worked perfect for me just now as well. Documentation from BTT is not clear enough to understand that TH0 could have been used and the sample config uses TH0 instead of the 4-pin connector with dip switches.