Geeetech

I have a new G2s pro. I've managed to get it assembled despite the instructions missing one or two steps and one captive nut missing on an extruder motor base. I have got the latest firmware source, compiled & uploaded in Arduino.

My actual problem is that as soon as I power it up, either just over USB or with the PSU, I get "Err: MAXTEMP" on the display see attachment

When I try to connect with Repetier-Host, I get:
13:31:30.806 : Printer reset detected - initalizing
13:31:30.806 : start
13:31:30.806 : echo: External Reset
13:31:30.806 : Marlin 1.0.3 dev
13:31:30.806 : echo: Last Updated: Dec 21 2015 13:21:45 | Author: (Hogan, Delta)
13:31:30.806 : Compiled: Dec 21 2015
13:31:30.806 : echo: Free Memory: 3637 PlannerBufferBytes: 1232
13:31:30.806 : echo:Hardcoded Default Settings Loaded
13:31:30.806 : echo:Steps per unit:
13:31:30.806 : echo: M92 X80.00 Y80.00 Z80.00 E93.00
13:31:30.806 : echo:Maximum feedrates (mm/s):
13:31:30.806 : echo: M203 X400.00 Y400.00 Z400.00 E45.00
13:31:30.806 : echo:Maximum Acceleration (mm/s2):
13:31:30.806 : echo: M201 X5000 Y5000 Z5000 E5000
13:31:30.806 : echo:Accelerations: P=printing, R=retract and T=travel
13:31:30.806 : echo: M204 P1000.00 R2000.00 T2000.00
13:31:30.806 : 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)
13:31:30.806 : echo: M205 S0.00 T0.00 B20000 X20.00 Z20.00 E5.00
13:31:30.806 : echo:Home offset (mm):
13:31:30.806 : echo: M206 X0.00 Y0.00 Z0.00
13:31:30.806 : echo:Endstop adjustment (mm):
13:31:30.806 : echo: M666 X0.00 Y0.00 Z0.00
13:31:30.806 : echo:Delta settings: L=delta_diagonal_rod, R=delta_radius, S=delta_segments_per_second
13:31:30.806 : echo: M665 L196.00 R92.00 S200.00
13:31:30.806 : echo:Material heatup parameters:
13:31:30.806 : echo: M145 M0 H190 B55 F255
13:31:30.806 : echo: M145 M1 H230 B70 F255
13:31:30.806 : echo:PID settings:
13:31:30.806 : echo: M301 P22.20 I1.08 D114.00 C1.00
13:31:30.806 : echo:Filament settings: Disabled
13:31:30.806 : echo:Z-Probe Offset (mm):
13:31:30.806 : echo: M851 Z-2.00
13:31:32.056 : Error:MAXTEMP triggered, system stopped! Heater_ID: 1
13:31:32.056 : Error:Printer halted. kill() called!

Resistance of all 3 thermistors is around 100-135kohms.

Anyone got any suggestions?

Mark

check this link here:
http://www.geeetech.com/forum/viewtopic ... 13&t=17030

Hi Mark,

I'd seen that link. It hadn't helped until I made the following change:

I commented out the over temp check at line 1556 of temperature.cpp (if (current_temperature_raw[1] GE1 maxttemp_raw[1]) max_temp_error(1);)

Now the printer starts up, albeit with the thermistor for heater 2 out of action. I now have movement and good temperature indication on the bed and extruder 1. I swapped the thermistors over (I'd managed to leave them swapped in my previous tests) and the problem remains with heater 2 so I think I have a bad ATD on the board on that channel. It's showing 358º (i.e. ATD value 0) when cold. I guess it may just be possible that there's a short on the connector or similar. Do you agree with my diagnosis?

Regards

Mark

seems correct. Is there any solder bridge on the back of the thermistor connector? or anywhere on the back of the board?