In the past, I used the velocity extrusion mode. To do that I linked the "velocity of the extruder" with the "cartesian velocity of the nozzle".
In that way, the tricky part was to post-process in different ways the gcode, according to different slicers.
In fact:
- retractions,
- planar speed of the nozzle along with XYZ with no extrusion
needs to be written in the gcode. Moreover, often you need to "manual extrude" ( when you need to purge or change/test a new material ) so you need in the GUI an easy way to jog the extruder.
During a program inside the gcode was needed an M command to link the extrusion to the planar movement or to unlink it.
It obviously will be better if the lookahead option could be implemented also for "A" or "U" axis.
The behaviour of our machine changes a lot if we use a gcode where there is the fourth axis "A". Without the fourth coordinate, all the movements are smoother.
Nothing changes if we use "U" instead of "A".
I read about a linuxcnc version with the blending arc option is active also for "U, V, W" here:
github.com/LinuxCNC/linuxcnc/tree/feature/uvw-blending-dev
Did someone try this out?
