Good evening,

Would it be possible to operate an extruder in closed loop mode?

For instance with:

• Duet3D magnetic encoder on the extruder's stepper (commutation)
• Duet3D magnetic filament monitor near the hotend (close the loop)
• Duet3D 1HCL

If this would be possible, it could improve:

• Estep calibration, material independent
• Retraction
• Backlash in the bowden tube
• VFA due to excentric hobs
• VFA due to speed variations caused by poorly meshed (dual) extruder gears
• Possibly pressure advance
• Non linear extrusion
• Extruder feed forward

Thanks in advance!