[3D Printer Series] Volumetric Flow

To see the max speed at which you can print you need the volumetric speed at which you can print.

The max volume for the Dragon w/ SUNLU Red PLA is 20mm^3/s. The true max speed is actually a bit higher but I step it back a fair amount to make sure I get good repeatability.

First set your extruder temp (mine is 205C)

Gcode to test various extrusion speeds:

G91

; Run the following multiple times until the extruder

; starts skipping. Increase the F# by 100 each time

G1 E250 F300 ; extrude 250mm at 300mm/min

My max was F600, but I back it down to F500. 

To calculate volumetric flow we take feedrate (500) x filament cross sectional area pi * (1.75mm/2)^2 = 2.405 => 20mm^3/s.