will this 4th axis work

[Robin Hewitt]

Has anyone bought one of these harmonic drive index chuck thingies? Are they any good? Is the lack of a through shaft putting you off? Who will Magicniner contradict next? So many questions, life is too short for all these questions.

[magicniner]

Who will Magicniner contradict next?

As you clearly prefer your information to be of the non-factual variety I'll leave you to it :D

[A_Camera]

Has anyone bought one of these harmonic drive index chuck thingies? Are they any good?

I am sure they are pretty good otherwise they would not be sellable.

Is the lack of a through shaft putting you off?

Yes. That and the fact that it is considerably more expensive.

Who will Magicniner contradict next?

I found his comments very informative and valuable. I don't know what you see was wrong with his comments or choice of words, but I did not find them contradicting, quite the opposite. I would actually be interested in hearing more about his experience and the modifications he did, as well as how he is using it.

So many questions, life is too short for all these questions.

...so why did you ask the last one then? It was pretty rude and unnecessary. His comments were pretty valuable, as opposed to your last question...

[Robin Hewitt]

I...so why did you ask the last one then? It was pretty rude and unnecessary.

Don't worry, he's a Yorkshireman, he's already retaliated.

[johngoodrich]

magicniner, do you have any photos of the mods you have done to your 4th axis. I would like to see it. from your experience with these, do you thinkit would be ok for 4th axis wood milling as is, or a bit of modding

[magicniner]

John,
I have an early pic of the "proof of concept" I knocked up with what I had lying around,



I've subsequently re-worked the spacer support with alternate bearings to reinstate the through capacity of the spindle, it does what I need in brass, bronze, aluminium and steel.
I don't think it would have been up to much without the tensioner to remove backlash, without the support the stepper shaft bends if you tension the belt,
Regards,
Nick