Hi Lucia,
in addition to Roland 's tip, here is a description how to control extruded in a way that is common in 3D printer world - using the G92 for resetting extruder and M82/M83 for switching between relative and absolute extruder programming.
%100
F100
M82 (absolute extruder programming
G92 E0 (reset extruder
G01 X1 Z0.1 E1
G01 X2 Z0.1 E2
G01 X3 Z0.1 E3
G92 E0 (reset extruder
G01 X1 Z0.2 E1
G01 X2 Z0.2 E2
G01 X3 Z0.
It utilizes the AIL system for overriding the default G-codes therefore it’s slightly more powerful than just solving it using the preprocessor.
Extruder control.pdf (286.2 KB)
extension.zip (1.5 KB)