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extruder: Implement non-linear extrusion #4231

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extruder: Implement non-linear extrusion #4231

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Commits on Apr 30, 2021

  1. extruder: Implement non-linear extrusion 

    This allows klipper to compensate for slippage in the extruder at high back-pressures.
When enabled through SET_NONLINEAR_EXTRUSION, or nonlinear_a/b in the configuration,
the actual extrusion velocity will be modified to v(t) + A*v(t)^2 + B*v(t)^3
where v(t) is the requested velocity, and A/B the provided parameters.

This is similar to RepRap's M592 command, except correctly applied to accelerating moves
rather than simply scaling the distance of the entire move based on its average velocity.

Signed-off-by: Tobias Haegermarck <tobias.haegermarck@gmail.com>
    @Tobba
    Tobba committed Apr 30, 2021
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Commits on May 24, 2021

  1. extruder: Flush step generation before changing non-linear extrusion … 

    …parameters

Signed-off-by: Tobias Haegermarck <tobias.haegermarck@gmail.com>
    @Tobba
    Tobba committed May 24, 2021
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