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This is an advanced calibration, recommended only to experienced users.
This calibration only works on the firmware version 3.2.0 or newer and only works on the Original Prusa MK3 and MK3S, due to the Trinamic stepper drivers of the Einsy RAMBo.
Linearity correction is based on the Trinamic stepper driver feature that allows defining a custom current-waveform. The default Trinamic waveform is a sine function, but the real waveform can be a little bit different and depends on the stepper motor type. Also, motors of the same type can have different waveforms. The biggest distortion appears when the wave is crossing the zero point (or around it), so the original sine wave is modified using power function to eliminate this distortion.
This article addresses linear correction for the Extruder only.
Linearity correction calibration procedure
Go to your printer's LCD menu -> Settings -> Lin.Correction->E correct, and then turn it off
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