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
vicious-goldOP•2y ago
i dont have PT1000 i have 100
ohhh
sorry, for that, my brain is trained to a PT1000 😂
vicious-goldOP•2y ago
thanks any way 🙂
did you changed the sensor type in the extruder config?
sensor_type: PT100vicious-goldOP•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
vicious-goldOP•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
vicious-goldOP•2y ago
same as mine except sensor_pin: PC7
what motherboard are you using?
vicious-goldOP•2y ago
octopus 1.1 407
I don't think the octopus 1.1 has a MAX31865 chip?
vicious-goldOP•2y ago
i connect BTT Max31865 to driver3 slot.
this one here?
vicious-goldOP•2y ago
yes
have you configured the dip switches?
vicious-goldOP•2y ago
sure 123 on 4 off
vicious-goldOP•2y ago
Looking at the manual it doesn't list octopus board
https://github.com/bigtreetech/BIGTREETECH-MAX31865/blob/master/BIGTREETECH%20MAX31865%20V1.0/BIGTREETECH%20MAX31865%20V1.0%20Manual.pdf is it compatible?
GitHub
BIGTREETECH-MAX31865/BIGTREETECH MAX31865 V1.0 Manual.pdf at master...
BIGTREETECH-MAX31865 V1.0 and V2.0. Contribute to bigtreetech/BIGTREETECH-MAX31865 development by creating an account on GitHub.
maybe the jumper underneath the max board, on the octopus
which normaly sets the stepper driver mode
Nevermind v2.0 shows octopus
https://github.com/bigtreetech/BIGTREETECH-MAX31865/blob/master/BIGTREETECH%20MAX31865%20V2.0/BIGTREETECH%20MAX31865%20V2.0%20Manual.pdf
GitHub
BIGTREETECH-MAX31865/BIGTREETECH MAX31865 V2.0 Manual.pdf at master...
BIGTREETECH-MAX31865 V1.0 and V2.0. Contribute to bigtreetech/BIGTREETECH-MAX31865 development by creating an account on GitHub.
It says it has to be in spi mode. @Helge Keck do you know if that's the ratos default?
its uart
ratos default
so if the max board needs spi then you need to place all jumpers
and maybe a good idea to remove a evtl. placed sensorless homeing jumper for that stepper slot
vicious-goldOP•2y ago
i add 3 more jumper
Sorry guys my bad. The config folder in the machine tab is outdated. It didn't count the changes I made. 😦