My 3D printer is equiped with a Duet 3 MB 6HC and one Duet 3 EB 3HC.
On the extruder, I use 3 PT100 sensors and a fourth one for the heated build plate. All PT100 sensors are connected to the Duet 3 boards through a MAX31865.
On this printer, I can read all the temperatures of the PT100 sensors.
When I heat the extruder and extrude, I can still read all the temperatures normally.
But, once I start a print, I have two sensors on the extruder showing me 2000°C and the third one 0°C. Shortly after, I lose the connection on the Mother Board and the print is stopped.
The last time I got that error message : Error: M308: Response timeout: CAN addr 1, req type 6011, RID=901
The previous time I had this one : Failed to upload dwc2settings.json
Operation failed (Reason: Your Duet rejected the HTTP request: Unknown message type or not authenticated)
Once the sensors are showing me these anormal values I wasn't able to reset them, even with a M562, unless reseting the whole printer.
Here is what I get when trying a M308 S4 : Sensor 4 type PT100 (MAX31865) using pin 1.spi.cs2, last error: success, 2/4 wires, reject 50Hz, reference resistor 400 ohms
The issue only concerns the sensors that are connected to the Duet 3 EB 3HC. The build plate sensor doesn't have any problem.
I am kind of stuck here so any help would be appreciated.