PT100 setup? with daugherboard

Elvis0z

Hey guys
Got the daughterboard set up with a PT100 sensor. It's reading -275c. Not sure what gcode I put in to configure it. I have the hotend heater on E0 here is a picture of the wiring. PT100.daughter.board.jpg

aidar

https://duet3d.dozuki.com/Wiki/Connecting_PT100_temperature_sensors#Section_Firmware_configuration

Elvis0z

Followed that and get "temperature fault" sensor hardware error on heater 1 That is when I use this gcode

        "M308 S1 P"spi.cs1" Y"rtd-max31865"

Temp shows 2000c

aidar

From that link : In RepRapFirmware 3 you first create a sensor using M308 then assign it to a heater using M950

Did you assigned it to heater ?

A Former User

@Elvis0z said in PT100 setup? with daugherboard:

spi.cs1

try spi.sc0 or move the pt100 to the other input?

Elvis0z

@aidar LOL sorry mate I have no idea what I'm doing very new to all this.

Elvis0z

I'm going to try another sensor. I'm not sure about the code that I have to put in. I don't understand it.

Phaedrux

@Elvis0z He means change this M308 S1 P"spi.cs1" Y"rtd-max31865" to this M308 S1 P"spi.cs0" Y"rtd-max31865"

There's two channels to choose from on the daughterboard. spi.cs0 and spi.cs1. You've tried one, now try the other.

Elvis0z

Thanks heaps guys, It's working. I will do some tests as I also changed the sensor. Temp is now 19c

Elvis0z

Yep, swapped in the old sensor and gives a reading of 2000c new one back in and 19c. Thanks for the gcode as I'm just learning all this.

Dougal1957

@Elvis0z said in PT100 setup? with daugherboard:

Yep, swapped in the old sensor and gives a reading of 2000c new one back in and 19c. Thanks for the gcode as I'm just learning all this.

Any chance you can measure the Resistance of that Faulty sensor for me (I have a theory that i'd like to prove/disprove)?

Doug

Elvis0z

Yep can do. Will let you know

Elvis0z

@Dougal1957 It started of at about 95 and just keeps climbing. The good one was 108.5 and did not move. Hope that helps

Dougal1957

@Elvis0z said in PT100 setup? with daugherboard:

@Dougal1957 It started of at about 95 and just keeps climbing. The good one was 108.5 and did not move. Hope that helps

Yes thanksdisprooves my thoughts tho I was hoping it would have been a lot higher which would have been in line with the 2000 degrees reading but the fact it starts at 95 and steadily increases does suggest it not good.

Thanks for humouring me.

Doug