Adding A Third Temperature Sensor
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I am making an Extruder and want to use a PT1000 to measure heat creep in the heat sink with different fans/heat sink designs. IF I connect the PT1000 to E1 on the Duet board how do I change the config file so I can see all three temperatures, bed, extruder and heat sink?
Broad is a Duet 2 WIFI running 3.0 firmware.
From current config file:
; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B4725 C7.06e-8 ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0 ; create bed heater output on bedheat and map it to sensor 0
M143 H0 S130 ; set temperature limit for heater 0 to 130C
M307 H0 B0 S1.00 ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0 ; map heated bed to heater 0
M308 S1 P"e0temp" Y"thermistor" T100000 B4725 C7.06e-8 ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T1 ; create nozzle heater output on e0heat and map it to sensor 1
M143 H1 S275 ; set temperature limit for heater 1 to 275C
M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit -
Use another M308 command to define the 3rd sensor. If you give it a name using the A parameter, you will be able to show it in DWC.
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I add the line below but it looks like it is reading 2000C. How do I fix this?
M308 S2 P"e1temp" Y"pt1000" A"Heat Sink"
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That reading suggests that the PT1000 isn't connected.
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I checked the resistance and it is 95K at room temperature. It is plugged into the connector next to the heater block.
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@Keith53 said in Adding A Third Temperature Sensor:
I checked the resistance and it is 95K at room temperature.
In that case it's a 100K thermistor, not a PT1000.
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I changed it to M308 S2 P"e1temp" Y"thermistor" A"Heat Sink" and it works now. Wonder why E3D calls it a PT1000?
Is there a way to get it to show up with Tool 0 and Bed so I do not need to push the "Extra" button to see the temp?
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@Keith53 said in Adding A Third Temperature Sensor:
Wonder why E3D calls it a PT1000?
If you ordered a PT1000, maybe they shipped you the wrong part?
@Keith53 said in Adding A Third Temperature Sensor:
Is there a way to get it to show up with Tool 0 and Bed so I do not need to push the "Extra" button to see the temp?
At present, only by creating a dummy heater that uses sensor 2 and a dummy tool that uses the dummy heater.
