Are taper lock pulleys a good choice for ball screws?

[dazp1976]

Nema 34's, even smaller Nm ratings are often wrong for a Router unless they have high voltage drives because they cannot reach the RPMs before torque drops away. 99% of the time you'll find the same Nm rating or lower NEMA 23 or 24 will outperform the NEMA 34 given the same voltage. This is mostly down to the inductance of the smaller motor being much lower which allows higher torque/rpm's.

A wise choice and the right approach.

Even with motors of near the same inductance is proven.

Results using 60V on a G0704 sized mill, all driver settings identical, X & Y axis:

Nema34, 1080oz (7nm and change) 3.5mh inductance:
Loud, bad resonance, max velocity 2000mm/min, stalls thereafter, Inertia causes 0.2mm overshoots at stop.

Nema24, 566oz (4nm) 3mh inductance:
Near silent, max velocity can exceed 3000mm/min, stops dead, accels like a rocket.

Still have a 1080oz on Z, (2000 is quick enough there). Might need it for my spindles new servo motor (7kg weight)
Upping the power to 72V, might change driver to a stepperonline 100vdc input one (psu can go to 80).


Nema 34 1600oz (12nm) YES I was one of those newbies
Thrown straight in the bin. Too embarassed to mug it off onto someone else!