Harmonic 4th Axis

[Leadhead]

Hi - Has anyone tried one of the bay, Chinese "harmonic 4th axis`s" please. getting tempted by the price!!
Would welcome any feed back that may be available please. (Using Mach3)

[komatias]

Not tried these but the harmonic drive is the way to go for zero backlash. What motor does the one you are looking at have?

[magicniner]

The harmonic drive units look good, I chose the belt driven type knowing I'd have to re-engineer it to deal with backlash because I wanted the through-capacity for working on long parts,

- Nick

[Leadhead]

Hi - Nema23 57mm 3A 2-phase 4 wire.