Extrusion Calibration v2

After re-reading Triffid Hunter’s calibration guide I was specifically curious about the final comments about volumetric extrusion which makes sense as we are dealing with something that has volume.

You can read up on the process and the rationale behind it HERE

Put simply:

  1. Set the filament diameter to 1.128379 and never change it
  2. Set the extrusion multiplier to 1 and never change it
  3. Divide your E-Steps by 7 for 3mm filament or 2.4 for 1.75mm filament
  4. Multiply your E related speeds, accelerations and retractions by 7 for 3mm filament or 2.4 for 1.75mm filament
  5. In Sli3r multiply the Retraction Length and Retraction Speed by 7 for 3mm filament or 2.4 for 1.75mm filament

Multiply the E settings by 7 for 3mm filament or 2.4 for 1.75mm filament in the Marlin firmware in the following lines:

Configuration.h

#define DEFAULT_AXIS_STEPS_PER_UNIT
#define DEFAULT_MAX_FEEDRATE
#define DEFAULT_MAX_ACCELERATION

#define DEFAULT_ACCELERATION
#define DEFAULT_RETRACT_ACCELERATION

The only calibration you will then make is by altering the E-Steps.  You can alter this mid-print by either sending gcode M92 Ennn (where nnn = the new E-Steps number) or by adjusting it on the printer’s LCD control panel.

You can either calibrate the E-Steps by visual inspection where you’re looking for gaps in the infill at 95% and with no gaps on a solid fill or after slicing a single wall cube with no infill look in the gcode for the perimeter width, print it halfway and then measure the wall width.

 

Advertisements
Tagged ,

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: