e3d v6 pt100 MAXTEMP triggered

Hello everyone,

i got a Problem with my pt100 from e3d.
I followed the Doc here: [wiki.e3d-online.com]

But the only thing that happen is that the Max Temparture was triggered and the printer turns off.
(I don't think that 21°C are the max Temparture right? )

Pronterface Output:
[imgur.com]

I've changed the pin configuration at: Line 108 form 13 to 3
[github.com]

And changed the Sensor to TEMP_SENSOR_0 20 in the configuration.h


Here is my Marlin 1.1.0RC7: [www.file-upload.net]

What did i wrong or what do i have to do?

Edited 1 time(s). Last edit at 11/18/2016 09:15AM by DeathmannX.

This is normally a issue with the thermistor cables shorting together, probably at the hot end

When they short the machine thinks your suddenly at a very high temp.

There is no cable where they can shorting together?
I got no female to female wire so i cut a male to female cable and solder together.
I checked if its work with my Multimeter and i can measure the 5V + and -



By the way:
if the Amplifier Board is not connected i got the same Error...

Edited 2 time(s). Last edit at 11/19/2016 12:28PM by DeathmannX.

I don't use RAMPS, however when using a PT100 sensor it is likely to be an open circuit in the sensor or its wiring that causes a maxtemp error. This is because a PT100 has a positive temperature coefficient.

---

Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

So what can i do now?

1. Check that the connections between your PT100 sensor and amplifier are secure.

2. If you have a multimeter, use it to measure the resistance of the PT100 sensor. It should be a little more than 100 ohms.

3. If you have a 100 ohm resistor, connect it to the amplifier input in place of the sensor. The temperature should read 0C assuming Marlin doesn't report mintemp at that temperature.

4. Check the ground connection between the amplifier board and the RAMPS.

Btw there are other 3d printer electronics boards and firmware that use a digital interface to the PT100 that provides separate detection of sensor open/short circuit conditions.

Edited 1 time(s). Last edit at 11/19/2016 02:05PM by dc42.

---

Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

1. Connection is Secure. (Checked with my Multimeter that the Wires are not broken with that Beep Setting. (I'am no Electric Man so i don't realy know how thats called)).

2. Resistance are exactly 120,6 ohms

3. I got no 100 ohm Resistor

4. Did that with the Methode of 1.

E3D self say it have to work they have a Guide (that not worked for me) so it have to work.
I've already wrote E3D in there own Forum and got no real Support.

Greg tryed it but sry Questions like: "You are trying it with the sensor plugged into the amplified board yes?" Is no real help.
Source: [forum.e3d-online.com]

This is no help he could also ask me if i put in my Cables in to the Ramps Board....
Sry but it is realy frustrating to got 25% a Printer next to me without functionality and no working Support from E3D it self...

By the way:
If forget that the Marlin Team told me how to calculate the Temparture for the Thermistortable:

MarlinValue = round(1023/5*E3D_Value)
In my Case from 2. = round(1023/5*120 ohm) = 24552
This is something around 20°C

in the Thermistortables.h is: [pastebin.com]

The THERMISTORHEATER_0 got a MAX Temparture from: 16383 so my Value is higher and it should be something like: 44700 (300°C).
I tryed to change it in the software but i become som Errors and the Printer got the same max temparture triggered message like before.

Edited 3 time(s). Last edit at 11/19/2016 09:34PM by DeathmannX.

If you entered your own thermistor table then I suspect that is where the problem is. According to the E3D instructions, there is already a suitable table defined in Marlin.

---

Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

i didn't changed the Table in all.
I changed the max temparture for testing once.

#if (THERMISTORHEATER_0 == 20)
  #define HEATER_0_RAW_HI_TEMP 16383
  #define HEATER_0_RAW_LO_TEMP 0
#endif

But i already changed it to default.