MAX31865 & PT100
Hello,
I put my motherboard in spi mode and connected it to max31865. I also connected the 2-wire pt100 but the extruder temperature is around -56. What did I do wrong?
28 Replies
dont use the max chuip, use the normal thermistor port
the PT1000 doesnt need that
yappiest-sapphire•2y ago
i dont have PT1000 i have 100
ohhh
sorry, for that, my brain is trained to a PT1000 😂
yappiest-sapphire•2y ago
thanks any way 🙂
did you changed the sensor type in the extruder config?
sensor_type: PT100yappiest-sapphire•2y ago
oww i use MAX31865, i am trying
or maybe you have to change the resistor value
some boards have small jumpers to configure the max chip
yappiest-sapphire•2y ago
sensor_type: PT100 not worked still same
ok, then you should observe your board, there must be a jumper bank
close to the max chip
on my toolboard i would need to tell the max chip which thermistor i use, there are 4 jumpers on my board
I had to do this for the PT1000 using the MAX chip, I believe it is the same for PT100 just different specific values for the 100
sensor_type: MAX31865 sensor_pin: PF8 spi_software_sclk_pin: PA5 spi_software_miso_pin: PA6 spi_software_mosi_pin: PA7 rtd_nominal_r: 1000 rtd_reference_r: 4300 rtd_num_of_wires: 2 rtd_use_50Hz_filter: False smooth_time=0.5This was on my octopus pro FYI
yappiest-sapphire•2y ago
same as mine except sensor_pin: PC7
what motherboard are you using?
yappiest-sapphire•2y ago
octopus 1.1 407
I don't think the octopus 1.1 has a MAX31865 chip?
yappiest-sapphire•2y ago
i connect BTT Max31865 to driver3 slot.