On going chinese 6040 problems

[EddyCurrent]

It looks like you have this setup;

3163B Stepper Driver
set to;

Dynamic Current = 2.5A
1/8 Microstep
50% Standstill Current

57HD5401-14S/8 Stepper Motor

1.8 step angle
6.6V
3A
2.2 Ohms
8mH
17kg/cm
4 wire

24v 8.3A DC PSU
1605 ball screws


And that being so, the settings you have seem to be okay as far as I can make out.
However I did a conversion of the motor torque setting and 17 kg/cm = 1.6671305 Nm, this is not so good but as your video shows they are not under load.

I think you could reduce the microstepping and see if that helps, remember to change the Mach3 'steps per' to match.

5m pitch
1.8 deg motor
1/8 microstep (8)

360/1.8 = 200
200/5 = 40
8 * 40 = 320 steps per

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Reduce microstepping to 2 by setting K1 ON, K2 OFF

5m pitch
1.8 deg motor
1/2 microstep (2)

360/1.8 = 200
200/5 = 40
2 * 40 = 80 steps per