Rat Rig Community [Unofficial]•2y ago

Ebb36 Pt1000 temperature incorrect

Hello, when I use my PT1000 (verified good), sensor with Ebb36 TH0 port and pt1000 jumper I get 130C when it should be 20c. When i connect to the 4pin connector (2 middle pins and dipswitches set for 2wire pt1000), i get ADC out of range. I have no overrides set. any help would be appreciated.

7 Replies

Helge Keck•2y ago

sensor_type: PT1000

stormy-goldOP•2y ago

where do i put that that is nowhere in the printer.cfg after adding to cfg the temp has gone up to 345C

miklschmidt•2y ago

Ah jumper.. you need to tell klipper that you changed the resistor value on your thermistor port.

[extruder]
#pullup_resistor: 4700
#   The resistance (in ohms) of the pullup attached to the thermistor.
#   This parameter is only valid when the sensor is a thermistor. The
#   default is 4700 ohms.

[extruder]
#pullup_resistor: 4700
#   The resistance (in ohms) of the pullup attached to the thermistor.
#   This parameter is only valid when the sensor is a thermistor. The
#   default is 4700 ohms.

Look up in the BTT EBB36 manual what the resistance is with the jumper installed. It's probably 2200 or less.

stormy-goldOP•2y ago

i resolved that issue, i had to use : MAX31865 but now i have a new issue pin e_heater_pin is reserved for spi2

stormy-goldOP•2y ago

stormy-goldOP•2y ago

or maybe the error just changed yea i plugged in 2200 and it worked fuck i guess ill have to tune the temp with the res value

miklschmidt•2y ago

No just look up the resistance in the manual

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Ebb36 Pt1000 temperature incorrect