K8200 Vibration Endstop Trigger Fix

The endstop switches used in the K8200 are sometimes triggered during a print when the frame is vibrating too much.
This happens mostly during zig-zag-filling of small perimeters and when using hexagonal infill with higher speeds.
It has the nasty side effect of misaligning all layers printed after the endstop is triggered, often ruining the print.

Basically, the X- and Y-motors are executing a movement command and are interrupted by the endstop triggering, cutting off the power supply to the motor since the printer thinks the end of the print bed is reached. So the remaining movement is not executed, but discarded, leaving the print head in a position a distance away from where it should be.

Sometimes this is only a small offset, but it can reach several millimeters or even centimeters when you're unlucky enough.

One cause is that the endstop switch is actually triggered by the actuator (the small metal tongue) which hits the switch with enough speed to 'click' it.

Ano