Where do gCode settings come from?

Here is a snip of my gcode

; generated by Slic3r 1.0.0RC2 on 2015-02-01 at 18:45:23
; layer_height = 0.4
; perimeters = 3
; top_solid_layers = 3
; bottom_solid_layers = 3
; fill_density = 0.4
; perimeter_speed = 30
; infill_speed = 60
; travel_speed = 130
; nozzle_diameter = 0.5
; filament_diameter = 3
; extrusion_multiplier = 1
; perimeters extrusion width = 0.50mm
; infill extrusion width = 0.53mm
; solid infill extrusion width = 0.53mm
; top infill extrusion width = 0.53mm
; first layer extrusion width = 0.70mm
G21 ; set units to millimeters
M107
M104 S200 ; set temperature
G28 ; home all axes
G1 Z5 F5000 ; lift nozzle
M109 S200 ; wait for temperature to be reached
G90 ; use absolute coordinates
G92 E0....................................................
..................................................................

Of course there is a lot more in the code but my question lies in the snippet above......

Where do the above settings come from? Take

 M104 S200

and

M109 S200

I understand that these set the temp but where do these settings come from? I've checked everywhere in Pronterface and in Slic3r and changed those settings but everytime I slice it and generate gcode they default to S200. I've also checked the firmware.

Any ideas?

Also, where are the other settings coming from? Are they mathematical calculations based on some settings in PF or slic3r?

fletch367

They come from within the slicer. If you are making the changes in the slicer but they don't show up in your g code then you are doing something wrong. Most likely you are not saving the settings, or are saving them in a location where they are not expected to be.

Edited 1 time(s). Last edit at 02/01/2015 10:09PM by jbernardis.

That did it. When I downloaded the file from gitHub there wasn't an setup.exe or install file so I just made a shortcut from the existing location to the desktop. Since that wasn't working I deleted that shortcut. Moved the entire dowload file to C:\Program Files\ and made another shortcut to that location. Now the settings from slic3r are working. I set it to 230 and the gCode comes up M104 S230.

Thanks for the tip!!!!

fletch367