no-jam-extruder idea

[burki 1]

Thank you for clarifying.

I have the feeling that at least a big part of this tugging effect should be eliminated by the fact that you are measuring the actual force on the push side of the extruder.

A lot of the remaining forces might maybe be if not eliminated then at least reduced by a better spool holder. Thinking about ball bearings. Maybe even a second feeder mechanims, mut that would most likely go too far, and pervert the original idea of having an easy, low-cost and simple to integrate way of improving matters.

i am very much interested in reading about your findings!

 

[aviphysics 9]

What you are measuring is the net force on the free end of the load cell.

Like you said, to fully eliminate it, you have to setup up some kind of despooling system. Maybe a photogate that activates a motor when the beam is broken by the filament. Alternatively, an arm that is moved by the filament, and increasing the despooling rate as the arm is is moved. Alternatively, a sufficient amount of filament could be despooled ahead of time.