will this 4th axis work

[Gary]

Harmonic is a brand name and people recognise it just like hiwin,but yes its epicyclic.

What is a harmonic drive? Do they mean epicyclic?

[magicniner]

Er, no they don't and no it certainly is NOT!

https://en.wikipedia.org/wiki/Harmonic_drive

https://en.wikipedia.org/wiki/Epicyclic_gearing

Both have teeth, that's about it for similarity.

[Gary]

I stand corrected.
So its a Strain wave gearing.

Er, no they don't and no it certainly is NOT!

https://en.wikipedia.org/wiki/Harmonic_drive

https://en.wikipedia.org/wiki/Epicyclic_gearing

Both have teeth, that's about it for similarity.

[paulus.v]

Harmonic drives are the perfect solution for high gear ratios, high torque, lightweight, and the most important, they have no backlash. Widely used in multi-axis cnc, articulated robots, etc.

There are a lot of them on ebay, SH from Korea, the only ones at an affordable price...

I was surprised that the Chinese claim to have 4th axis with harmonic drive... possibly used ones fitted inside..

[machpoet]

cheaper. shipped from Germany as well.

what about this one? harmonic drive they say.

[machpoet]

hi chaz. any idea where you have seen them cheaper. the only place I have seen is china and then you get vat and import on them so doesn't work out