Enclosed chamber temperature monitoring

[A Former User]

I also just use a generic 100k thermistor without a heater ascociated, it shows up on the "extra" tab and can be graphed.

M305 S"Chamber temp" P103 T100000 B3988 C0 R2200 X1 ; Case temp 100k semtek on E0 thermistor input.

[dc42]

Summarising the above, there are two ways:

• If you want to control the chamber temperature using a heater and thermistor, configure it using M141 and it will show up in DWC as normal (but not yet in PanelDue).
• If you don't want to control a heater but you just want to display the chamber temperature, create a named virtual heater as in the post by @bearer.

[vacalos]

@bearer

Thanks for the help.

I purchased a generic 100k 3950 Thermistor and installed it.
It works just as you described, however the temperature reading appears to be off by about 20°C.

I used the code "M305 S"Chamber temp" P103 T100000 B3988 C0 R2200 X1".
Is there a section of the code that I need to change based on my specific thermistor, or do I need to somehow tune the thermistor in order to produce an accurate reading?

[A Former User]

I have a Maestro board and it uses a different series resistor so the R2200 value may be wrong if you have a Ethernet or Wifi Duet.

The B3988 part allows you to adjust the response as well.

I found these links helpfull when trying to get mine to show the correct temperature.
https://www.ametherm.com/thermistor/ntc-thermistor-beta
https://www.thinksrs.com/downloads/programs/therm calc/ntccalibrator/ntccalculator.html

As well as the wiki for the M305 command
https://duet3d.dozuki.com/Wiki/Gcode#Section_M305_Set_temperature_sensor_parameters

[dc42]

@vacalos said in Enclosed chamber temperature monitoring:

@bearer

Thanks for the help.

I purchased a generic 100k 3950 Thermistor and installed it.
It works just as you described, however the temperature reading appears to be off by about 20°C.

I used the code "M305 S"Chamber temp" P103 T100000 B3988 C0 R2200 X1".
Is there a section of the code that I need to change based on my specific thermistor, or do I need to somehow tune the thermistor in order to produce an accurate reading?

As @vacalos says, R2200 is wrong for the Duet WiFi. You can leave out the R parameter from the M305 command, then it will use the default value.

[vacalos]

Thanks,

It's working perfectly.
I also tried using the "B" & "R" values that are used for my Heated Bed thermistor and they appeared to work as well.

M305 S"Chamber Temp" P103 T100000 B3950 C0 R4700 X1

[vacalos]

Is there a way to get the temperature values that appear in the "Extra" tab in DWC to appear along with the Heaters on the "Tool" tab?

[Sculpt Fabricator]

Trying to get the Chamber Temperature as shown above
M305 S"Chamber temp" P5 T100000 B3988 C0 X1 ; Case temp on E4 thermistor input.
I left out the R because we are running the Duet2 wifi. We are running the Duet2 wifi and Duex 5 and i'm connected to E4 thermistor 5 on the Duex 5
I'm not showing the Chamber heat in the +Extras as shown above?
Any help would be much appreciated

[Phaedrux]

@Sculpt-Fabricator Please start a new thread with your details. Include your firmware and DWC version as well.

[Arminas]

@sonderzug Are you using a water-cooled extruder?