Geeetech

The thermistor is a Epcos 100k. I've even built a new temperature array with the specs

Thermistor & PID settings

The thermistor is a 100k @ 25 Deg.C type B57550G, it has a B25/100 (beta) value of 4092, for more info see the data sheet. (http://www.epcos.com/inf/50/db/ntc_13/N ... _G1550.pdf)
I've installed even rambo addon for arduino

the same firmware recompiled only with changing the board type (from 301 to 33) works .

Firmware is Marlin V1 download from github https://github.com/ErikZalm/Marlin

Hi daxer70
I can send you the marlin firmware, we used in the test, you can upload the firmware and test again.
looking forward to you good news!
regards

Hi

many thanks… I'll wait for the firmware.

I've tried with another thermistor but the problem is the same.

I've modified the code in order to print the raw min temp and I
got 16368 (aka 16*1023).

where can I get the firmware?

D.

I'm so sorry, I forget to upload the marlin firmware in the post.

Bad news…

I've uploaded the firmware you gave me, I just changed the TEMP_SENSOR_0 to 1. But nothing…

I have compiled the code using RAMBo hardware add-on for arduino ide and even for 2560 board, but the result is the same.


< 06:38:36: ¤start
< 06:38:36: echo: External Reset
< 06:38:36: Marlin 1.0.0
< 06:38:36: echo: Last Updated: RAMBo_1-1b_GLCD_v1 on Jul 3 2014 06:37:34 | Author:
< 06:38:36: Compiled: Jul 3 2014
< 06:38:36: echo: Free Memory: 3367 PlannerBufferBytes: 1232
< 06:38:36: echo:Hardcoded Default Settings Loaded
< 06:38:36: Error:0
< 06:38:36: : Extruder switched off. MINTEMP triggered !
< 06:38:36: Error:Printer stopped due to errors. Fix the error and use M999 to restart. (Temperature is reset. Set it after restarting)
< 06:38:38: echo:SD init fail
< 06:38:38: ok
< 06:38:39: FIRMWARE_NAME:Marlin V1; Sprinter/grbl mashup for gen6 FIRMWARE_URL:https://www.makerstoolworks.com PROTOCOL_VERSION:1.0 MACHINE_TYPE:MendelMax EXTRUDER_COUNT:1
< 06:38:39: ok
< 06:38:39: ok T:0.0 /0.0 B:0.0 /0.0 @:0 B@:0

I'm using IDE 1.0.5 on Mac with RAMBo Hardware add-on

I'm sorry to inconvenience you
I didn't mention before, Most of our marlin firmware upload, All are such operation, Ctrl+A selected all files, drag and drop into the Arduino.
then you can upload firmware perfect.Complete test, we don't need to modify any firmware.
You can also have a try.

Sorry, with "but nothing" I meant that there was still the problem reading the temperature...

I was able to upload the new firmware, but I had the same result for temperature reading... MIN TEMP ERROR.