PT100 daughter board issues
I'm running RepRapFirmware for Duet 2 WiFi/Ethernet 3.3 (2021-06-15)
Duet WiFi Server Version: 1.26
I was looking over the code and still no luck. The temp shows 2000c but the hotend is cold. There must be some software issue. I used the configurator but somehow things are not right.
Share your config and a photo of how you have the board setup. Are you sure it's a PT100 sensor?
; executed by the firmware on start-up ; ; generated by RepRapFirmware Configuration Tool v3.2.3 on Fri Jun 18 2021 18:18:06 GMT-0400 (Eastern Daylight Time) ; General preferences G90 ; send absolute coordinates... M83 ; ...but relative extruder moves M550 P"CR-10s Modified" ; set printer name ; Network M552 S1 ; enable network M586 P0 S1 ; enable HTTP M586 P1 S0 ; disable FTP M586 P2 S0 ; disable Telnet ; Drives M569 P0 S1 ; physical drive 0 goes forwards M569 P1 S1 ; physical drive 1 goes forwards M569 P2 S0 ; physical drive 2 goes forwards M569 P3 S1 ; physical drive 3 goes forwards M584 X0 Y1 Z2 E3 ; set drive mapping M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation M92 X80.00 Y80.00 Z400.00 E420.00 ; set steps per mm M566 X900.00 Y900.00 Z60.00 E120.00 ; set maximum instantaneous speed changes (mm/min) M203 X6000.00 Y6000.00 Z180.00 E1200.00 ; set maximum speeds (mm/min) M201 X500.00 Y500.00 Z20.00 E250.00 ; set accelerations (mm/s^2) M906 X800 Y800 Z800 E800 I30 ; set motor currents (mA) and motor idle factor in per cent M84 S30 ; Set idle timeout ; Axis Limits M208 X0 Y0 Z0 S1 ; set axis minima M208 X305 Y305 Z330 S0 ; set axis maxima ; Endstops M574 X1 S1 P"xstop" ; configure active-high endstop for low end on X via pin xstop M574 Y1 S1 P"ystop" ; configure active-high endstop for low end on Y via pin ystop M574 Z1 S1 P"zstop" ; configure Z-probe endstop for low end on Z ; Z-Probe M558 P1 C"zprobe.in" H5 F120 T6000 ; set Z probe type to unmodulated and the dive height + speeds G31 P500 X0 Y0 Z2.5 ; set Z probe trigger value, offset and trigger height M557 X15:215 Y15:195 S20 ; define mesh grid ; Heaters M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; 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 M307 H0 B0 R0.594 C256.0 D5.32 S1.00 ; disable bang-bang mode for the bed heater and set PWM limit M140 H0 ; map heated bed to heater 0 M143 H0 S120 ; set temperature limit for heater 0 to 120C M308 S1 P"spi.cs1" Y"rtd-max31865" ; configure sensor 1 as thermocouple via CS pin spi.cs1 M950 H1 C"e0heat" T1 ; create nozzle heater output on e0heat and map it to sensor 1 M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit M143 H1 S380 ; set temperature limit for heater 1 to 380C ; Fans M950 F0 C"fan0" Q500 ; create fan 0 on pin fan0 and set its frequency M106 P0 S0 H-1 ; set fan 0 value. Thermostatic control is turned off M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency M106 P1 S1 H1 T45 ; set fan 1 value. Thermostatic control is turned on ; Tools M563 P0 D0 H1 F0 ; define tool 0 G10 P0 X0 Y0 Z0 ; set tool 0 axis offsets G10 P0 R0 S0 ; set initial tool 0 active and standby temperatures to 0C Miscellaneous M575 P1 S1 B57600 ; enable support for PanelDue ; Custom settings are not defined undefined![20210627_190456.jpg](/assets/uploads/files/1624835260427-20210627_190456-resized.jpg)
The thermistor is Slice engineering PT 100 450c
I will take a look at the links you posted.
@phaedrux I think a PT100 is an RTD element that is low resistance. I took it out of the circuit and checked resistance with ohmmeter. It looks like an open. I started off without the shorts on the outer pins. I guess There was over voltage applied to it and ruined the Thermistor.
I did see those links earlier. I just tried a test of that channel. I installed the test resistor and I see -1.3c current temp. I'm trying to get setup to print higher temp filaments. I was thinking about thermocouple as sensor but I couldn't find a daughter board. Maybe PT100 is a better way to go?
The thermistor is Slice engineering PT 100 450c
Is this what you have? This is not a PT100, it's just a high temperature thermistor.
To use the PT100 daughterboard you would need a PT100 sensor like this: https://e3d-online.com/products/pt100-temperature-sensor
A thermocouple is different as well and has it's own daughterboard:
See here for some info on different kinds of temp sensors
If you already have the PT100 daughterboard and a hotend that can take a cartridge style sensor, than getting the E3D PT100 sensor is a good option if you want to use high temp materials as it's good up to 500c.
@phaedrux Hi, I think you are correct. I checked back on the order and it is a high temp thermistor. I ordered the one you left a link to, so it should arrive soon. Since the test with a resistor shows near zero I think the software and daughter board are working ok.