Building Foldarap 1. Problem with termistor

Hi everyone.

I am amateur in 3d printer. I am building foldarap1

I am several days without progress.

I have a problem when I going to test the printer with Pronterface. I obtain this error:

---

Connecting...
start
Printer is now online.
echo: External Reset
Marlin 1.0.0
echo: Last Updated: Sep 9 2014 18:59:16 | Author: (Emmanuel, FoldaRap Minitronics)
Compiled: Sep 9 2014
echo: Free Memory: 5320 PlannerBufferBytes: 1232
echo:Hardcoded Default Settings Loaded
echoteps per unit:
echo: M92 X162.00 Y161.00 Z8000.00 E280.00
echo:Maximum feedrates (mm/s):
echo: M203 X400.00 Y400.00 Z2.00 E50.00
echo:Maximum Acceleration (mm/s2):
echo: M201 X6000 Y6000 Z40 E10000
echo:Acceleration: S=acceleration, T=retract acceleration
echo: M204 S1500.00 T3000.00
echo:Advanced variables: S=Min feedrate (mm/s), T=Min travel feedrate (mm/s), B=minimum segment time (ms), X=maximum XY jerk (mm/s), Z=maximum Z jerk (mm/s), E=maximum E jerk (mm/s)
echo: M205 S0.00 T0.00 B20000 X20.00 Z0.40 E5.00
echo:Home offset (mm):
echo: M206 X0.00 Y0.00 Z0.00
echoID settings:
echo: M301 P19.25 I1.90 D48.25
Error:0
[ERROR] Error:0

: Extruder switched off. MINTEMP triggered !
Error:printer stopped due to errors. Fix the error and use M999 to restart. (Temperature is reset. Set it after restarting)
[ERROR] Error:printer stopped due to errors. Fix the error and use M999 to restart. (Temperature is reset. Set it after restarting)

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I have ckecked the wires and change the termistor without success. I have mesuared the tesrmisted and I obtained ~ 86-88 ºC.

I have changed in the firmware of Emmanuel this value:
#define HEATER_0_MINTEMP 5 by #define HEATER_0_MINTEMP -1
I dont obtain the error, I can test X,Y, Z motors but not the extruder motor because the tempeture sensor arrives only to ~65 ªC but the hotend is hot for fusion PLA.
I attach you my configuration.h


Also I have checked with test firmware the Minitronic 1.1

I did the test board firmware. The LED is OK, the motors is OK, NOSFETs OK and for temperature conections obtained this values:

without termistor:

T1 1023 T2 1023 T3 45 E1 0 E2 0 E3 0
T1 1023 T2 1023 T3 45 E1 0 E2 0 E3 0

With termistor

In 1
T1 1019 T2 1023 T3 64 E1 0 E2 0 E3 0
T1 1018 T2 1023 T3 63 E1 0 E2 0 E3 0

In 2
T1 1023 T2 972 T3 63 E1 0 E2 0 E3 0
T1 1023 T2 972 T3 63 E1 0 E2 0 E3 0

In 3
T1 1023 T2 1023 T3 0 E1 0 E2 0 E3 0
T1 1023 T2 1023 T3 0 E1 0 E2 0 E3 0


I have ckecked with several termistor.

I have read that the value would be about 890... Is the board ok?


Please, can you help me?
Thanks and regards

Edited 1 time(s). Last edit at 09/10/2014 03:08PM by Wychy7.

you have to change the value "extrude mintemp 150". you have to set it lower as your temp for the hotend.

Hi gforce1 and thanks

I change the value and the extruder motor works but are they values corrects for the working printer.

I don't know much but I think the temperature must be good mesuared.