Heating until MAXTEMP error

yarek

Hello,

Other maxtemp/mintemp error posts seem to be addressing only short circuit/open circuit errors - this case seems to be a control issue, because both heating and termistors work.

I have just assembled my Prusa i3 with http://reprap.org/wiki/MKS_GEN_V1.1 board and I am trying to print a 10x10x10 box.

Extruder starts heating, but it doesn't stop after reaching the target temperature (200 C) and continues until printer throws maxtemp error at 290 C. I am using Reperier Host v1.5.6.

Has anyone experienced similar problems or have any idea what might be the cause?

Regards,

Jarek

P.S. Can I attach an image from local drive? I can only see an option to reference url.

My log:

"23:26:40.153 : <Slic3r> Done. Process took 0 minutes and 0.687 seconds

23:26:40.154 : <Slic3r> Filament required: 447.4mm (1.1cm3)

23:30:24.974 : Error:0

23:30:24.975 : : Extruder switched off. MAXTEMP triggered !

23:30:25.007 : Error:Printer stopped due to errors. Fix the error and use M999 to restart. (Temperature is reset. Set it after restarting)

23:30:25.007 : Printer stopped due to errors. Fix the error and use M999 to restart. (Temperature is reset. Set it after restarting)"

Beginning of my g-code (it doesn't seem to go further than M109):

"; generated by Slic3r 1.2.9 on 2015-10-05 at 23:26:39

; external perimeters extrusion width = 0.50mm

; perimeters extrusion width = 0.64mm

; infill extrusion width = 0.64mm

; solid infill extrusion width = 0.64mm

; top infill extrusion width = 0.64mm

M107

M190 S70 ; set bed temperature

M104 S200 ; set temperature

G28 ; home all axes

G1 Z5 F5000 ; lift nozzle

M109 S200 ; wait for temperature to be reached

G21 ; set units to millimeters

G90 ; use absolute coordinates

M82 ; use absolute distances for extrusion

G92 E0

G1 Z0.350 F7800.000"

Repetier

This si caused by this line

M109 S200 ; wait for temperature to be reached

and your solution lies in your Marlin configuration or you have a hardware problem.

Try the command alone and see what heats up. Or use hosts temp set which can be changed. So turning it off there works while M109 only returns when target temp. is reached. My guess is that some other pin also triggers your heater (solder bridge on board) or you have connected heaters to wrong outputs resp. set wrong pin numbers.

yarek

I have double and triple checked (almost) every connection so I thought it was next to impossible for anything to be mixed up, and:

'M109 S200' started heating bed

'M190 S70' started heating extruder

It really was that stupid - I have mixed up heater connections (they were the only ones that I haven't re-checked). After correcting my mistake both extruder and bed heat up correctly and maintain more or less constant temperature.

Assembly at 2 am is never a good idea. Thanks!