1. #1
    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)

  2. #2
    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?
    https://emvioeng.com
    Machine tools and 3D printing supplies. Expanding constantly.

  3. #3
    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

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

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