Heat set 235, Print drops to 200 HELP!!

Hello, so i have been fighting with my Prusa I3 and upon a few other bed leveling issues, every time i try to print a test cube, at 235 since im using ABS, as soon as it starts to print the damn thing drops to 200 and starts printing, i have checked my Marlin, it seems ok, i checked slicer it seems ok, i have even tried taking away temp controls so that they stay at what i set them at but it keeps dropping to 200 as soon as the print starts. any ideas?

If you hit Save on the Filament Settings page it reverts to the previously-set temperatures, right? I had that problem and I don't remember what I did to fix it. I have been upgrading to the latest Slic3r as it's released. Until you figure it out you can open the output G-code with a text editor and change the M104 and M109 commands.

there are no M104 or M109 commands in my G code

Need more details..
If you're using Proterface for instance it will tell you what the temp/target temp is, like 229/230 for the extruder. What does it (or your lcd) say when you start printing?
Also, did you do a PID AutoTune? For instance: M303 E0 S230

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Quote
RPearce
there are no M104 or M109 commands in my G code

That sounds quite strange, not even in the start g-code?
It has to set the temp somewhere, or it would just use whatever temperature you have preset before you started the print (which isn't impossible, but not how most people print).
By your description, it sure sounds like you have "m109 s200" (or similar) in the start g-code. Could also be PID as mentioned previously. Other than that, slicer issues, thermal contact issues or electrical issues could be it, but it doesn't really sound like one of them.

/Andreas

Does the firmware/eeprom configuration have a maximum temp defined?

i have increased my max temps, no change, i dont have M109 code, only a M190 code which tells the bed to go to 110


G21 ; set units to millimeters
M107
M190 S110 ; wait for bed temperature to be reached
G28 ; home all axes
G1 Z10 F5000 ; lift nozzle
G90 ; use absolute coordinates
G92 E0
M82 ; use absolute distances for extrusion
G1 F1800.000 E-1.00000
G92 E0
G1 Z0.400 F7800.000
G1 X85.250 Y80.250 F7800.000


no i didnt do a PID auto tune (dont know how) but ill go through my PID stuff and see if it is set in there
no LCD

my start G code
G28 ; home all axes
G1 Z10 F5000 ; lift nozzle

Edited 1 time(s). Last edit at 02/17/2015 06:06PM by RPearce.

so during the cube test my printer started in the middle and made its way all the way to the front side...

Stepper current is too low. The controller expects that every step of the motor is sucessfully performed. Also, look through other settings. Sometimes there are redundant settings.