bad heated chamber temp

joule5

Why is my heated chamber temperature stuck at 60 degrees? Even while thermistor is disconnected. Same condition on test rig.

Repetier

Which firmware? What does log show in M105 response in host/server?
If also removing thermistor makes no difference it is probably reading a different pin than you think.

joule5

Trying dev2 with rumba32. M105 reports C: 59.4 even though its unplugged. I was able to make the fault occur for the bed but I cant seem to fix it.

Isn't this right?

// Rumba32.h Temperature Sensors

#define TEMP_0_PIN static_cast<int>(PC_4) // T0

#define TEMP_2_PIN static_cast<int>(PC_3) // T1

#define TEMP_3_PIN static_cast<int>(PC_2) // T2

#define TEMP_4_PIN static_cast<int>(PC_1) // T3

#define TEMP_1_PIN static_cast<int>(PC_0) // TB bed

// configuration.io

IO_ANALOG_INPUT(IOAnalogChambers, TEMP_4_PIN, 5)

IO_ANALOG_INPUT(IOAnalogBed1, TEMP_1_PIN, 5)

IO_ANALOG_INPUT(IOAnalogExt1, TEMP_0_PIN, 5)

IO_ANALOG_INPUT(IOAnalogExt2, TEMP_3_PIN, 5)

// Need a conversion table for epcos NTC

IO_TEMP_TABLE_NTC(TempTableatc, ATC_104GT)

IO_TEMP_TABLE_NTC(TempTablePT100, PT100_5V)

// Now create the temperature inputs

IO_TEMPERATURE_TABLE(TempChambers, IOAnalogChambers, TempTableatc)

IO_TEMPERATURE_TABLE(TempBed1, IOAnalogBed1, TempTableatc)

IO_TEMPERATURE_TABLE(TempExt1, IOAnalogExt1, TempTablePT100)

IO_TEMPERATURE_TABLE(TempExt2, IOAnalogExt2, TempTableatc)

Repetier

Have you already tried using TEMP_2_PIN instead of TEMP_3_PIN or putting sensor or other Tx pin and see if it changes? From logic it looks good so most likely number/physical pin mismatch or defect analog input or input pin is set to another function by some other config part using PC1 pin for whatever.

Also important in V2 is it listed in heaters array in configuration.h? The chamber using the sensor I mean. This I mean

#define NUM_HEATERS 4

#define HEATERS <br/>

{ &HeaterExtruder1, &HeaterExtruder2, &HeatedBed1, &HeatedChamber }

Guess you have as it appears in temp output, also not sure if that is required for reporting at the moment.

joule5

I have this in configuration.h

#define NUM_FANS 1

#define FAN_LIST </div>

{ &Fan1PWM }

#define NUM_HEATED_BEDS 1

#define HEATED_BED_LIST </div>

{ &HeatedBed1 }

#define NUM_HEATED_CHAMBERS 1

#define HEATED_CHAMBER_LIST </div>

{ &HeatedChambers }

#define SERVO_LIST </div>

{ &ZProbeServo }

#define TOOLS </div>

{ &ToolExtruder1, &ToolExtruder2 }

#define NUM_HEATERS 4

#define HEATERS </div>

{ &HeaterExtruder1, &HeaterExtruder2, &HeatedBed1, &HeatedChambers }

joule5

I tried different pins and confirmed the pin definitions from the stm data sheet. Marlin uses PA1 for heated bed. Using PA1 didnt' help.

joule5

Screenshot of printer with nothing connected, chamber reporting temp.
https://i.imgur.com/wuROsSi.png

joule5

I managed to create 2 erroneous readings now. I'm so confused.

Repetier

PC_0 - 5 is correct. I also have a rumba32 running on my delta. The delta rumba32 is the config I'm running.

Which is the second and what does it show and what did you change?

What is with your PT100 - you know that that one needs an amplifier board and a different sensor pin not one with 4.7k in serial? Did not say anything so far because you only mention chamber using a thermistor. Also PT100 is not a NTC sensor, you need IO_TEMP_TABLE_PTC for it as it has temperatures in inverse order.

joule5

If I change

IO_ANALOG_INPUT(IOAnalogChamber, TEMP_2_PIN, 5)

IO_ANALOG_INPUT(IOAnalogChamber, TEMP_1_PIN, 5)

Then the temperature reads correct but I was never able to get more than 3 temperatures to work.

I need the heated bed to work now so if I change TEMP_2_PIN to TEMP_4_PIN the same erroneous reading exists.

Now I'm out of possible pins. (I even tried using the aux pins used for thermocouples)

joule5

chasing this error from one pin to the next it seems

Repetier

Ok makes no sense to me mainly because I get not full informations. For every test I would need to know the configuration and wiring. Especially since PT100 will normally not work on thermistor inputs without extra board. But these boards can only be connected to thermistor input pins.

// Temperature Sensors

#define TEMP_0_PIN static_cast<int>(PC_4) // T0

#define TEMP_2_PIN static_cast<int>(PC_3) // T1

#define TEMP_3_PIN static_cast<int>(PC_2) // T2

#define TEMP_4_PIN static_cast<int>(PC_1) // T3

#define TEMP_1_PIN static_cast<int>(PC_0) // TB bed

#define THERMOCOUPLE_0_PIN static_cast<int>(PA_3) // A10 on EXP3

#define THERMOCOUPLE_1_PIN static_cast<int>(PA_4) // A9 on EXP3

So PT100 must be at THERMOCOUPLE_0_PIN or THERMOCOUPLE_1_PIN with pt100 sensor board.

So my guess is that your problems come from this mixing. Se better start with one input pin with ATC sensor for all analog tables and all heaters. Just for reading test that all show correct temperatures. Form there, start assigning the sensors you have. For first test also unplug all other sensors just to be sure that the one you read is connected where it should. You see in list above as comment how the pins are named on the board to find correct slot.

joule5

Can I start over? I just made a fresh start in the firmware too from the repo. Where all I've changed is this

// Need a conversion table for epcos NTC

IO_TEMP_TABLE_NTC(TempTableATC, ATC_104GT)

// Now create the temperature inputs

IO_TEMPERATURE_TABLE(TempBed1, IOAnalogBed1, TempTableATC)

IO_TEMPERATURE_TABLE(TempExt1, IOAnalogExt1, TempTableATC)

IO_TEMPERATURE_TABLE(TempExt2, IOAnalogExt2, TempTableATC)

After successful upload...

Extruder 2 reads 59.6 degrees and the board is brand new with nothing plugged into it except USB.

Repetier

Ok so as mentioned what happens if you set in TempExt2 instead of IOAnalogExt1 the value IOAnalogExt1 and also what are bed and extruder 1 showing? With that change you should see the same as for extruder 1.

Then change sensor of ext1 with ext2 and see if it becomes 60°C. If that happens sensor is defect or some other type with different resistence/temperature relationship.

joule5

"set in TempExt2 instead of IOAnalogExt1"

With that, both extruders now read 59.6

Repetier

So you now have

IO_TEMPERATURE_TABLE(TempExt1, IOAnalogExt1, TempTableATC)

IO_TEMPERATURE_TABLE(TempExt2, IOAnalogExt1, TempTableATC)

and before ext1 showed correct temperature and now in switched to 59.6? That would not make much sense except ext1 had 59.6 before as well.

Are you sure it is a ATC thermocouple? Did you measure resistance at room temperature. A PTC sensor would lead to completely wrong values and would be an explaination.

joule5

https://imgur.com/a/RG42sZF - screenshot of test

The sensor is Semitec 104GT thermistor

It seems temp_2_pin and temp_4_pin don't work as it should?

joule5

I could try setting up a thermocouple for use instead.

Repetier

The others have 0 temperature which is also wrong, so none works with that logic. Also what do I see - I mean which sensors were connected to what. You show definition of inputs but not which heater was assigned which. Do they change ich you remove or use a different sensor or 100k resistor. If not they are not working as supposed. But readings of 0 is nearly impossible to fake.

I think it is time to check the analog values read directly. In commands.cpp file add after

break;

case 669: // Measure lcd refresh time

these lines
case 820:

reportAnalog();

break;

Reupload and then sending M820 shows you the read analog values (0-4095). These change with real sensors and changed values. If not it is not configured as input e.g. because some other function uses pc2 or there might be some defect.

joule5

I put a thermistor on all pins now for you. This is a test setup. M820 results is there in the log. As you can see heated chamber is still a false/erroneous reading. Where is adc 3?

https://imgur.com/a/SO1qSNp</div>