I want to start playing with the volumetric extrusion capabilities of Marlin, but it's a little unclear to me after reading what little bit of info is out there exactly how to set it up.
Triffid Hunter's calibration guide has a small updated section on it but it appears that was written right after Marlin supported it and possibly before Slic3r did.
I'm using Marlin bugfix-1.1.x and Slic3r 1.2.9.
From what I can gather, setting Slic3r to use VE under "Printer Settings->General->Use Volumetric E" will generate gcode that contains the extrusion amount in mm^3.
My issue is what exactly to put in the M200 command for filament size for Marlin. The small blurb in the Marlin docs make it sound like it should be my actual filament size (i.e. 1.75), but the RepRap gcode docs page seems to indicate it should be the generic 1.128 (sqrt(1 / pi) * 2 = 1.128 for an extrusion multiplier of 1).
So, I'm not sure whether to issue a
Triffid Hunter's calibration guide has a small updated section on it but it appears that was written right after Marlin supported it and possibly before Slic3r did.
I'm using Marlin bugfix-1.1.x and Slic3r 1.2.9.
From what I can gather, setting Slic3r to use VE under "Printer Settings->General->Use Volumetric E" will generate gcode that contains the extrusion amount in mm^3.
My issue is what exactly to put in the M200 command for filament size for Marlin. The small blurb in the Marlin docs make it sound like it should be my actual filament size (i.e. 1.75), but the RepRap gcode docs page seems to indicate it should be the generic 1.128 (sqrt(1 / pi) * 2 = 1.128 for an extrusion multiplier of 1).
So, I'm not sure whether to issue a
M200 D1.75or
M200 D1.128
