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Author Topic: Facetron wandering dial indicator issue  (Read 1903 times)

FlashGP

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Re: Facetron wandering dial indicator issue
« Reply #15 on: April 24, 2021, 08:08:16 PM »
The mechanism is ingenious as the rotation of the thread moves the toothed bar and uses it to set the angle.  Fine adjustments to the angle are set by the hard stop screw raising or lawyering the toothed bar.

I haven’t seen any anti backlash mechanism, but expect this is taken care of by the weight of the quill pressing down in the mechanism.
Yours Sincerely
Flash (Gordon)

Dihusky

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Re: Facetron wandering dial indicator issue
« Reply #16 on: April 25, 2021, 06:04:08 PM »
Glad to see you had some success RC, it's an interesting configuration. That slop in the gear wheel shouldn't be there I'm sure, this would have to throw the accuracy out and I would think it would produce some lift on one side which would show on the facet, cutting deeper on the side closest to you. When one considers the micron accuracy of a facet, slop anywhere in the mechanism is totally unacceptable.

When I think back to servicing the Topaz Tec XT6, all the shafts were in roller bearings with thrust bearings on the joining faces which could be pre-loaded, there was no lose play anywhere.

The Facetron doesn't impress me. :-\

RoughCreations

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Re: Facetron wandering dial indicator issue
« Reply #17 on: April 27, 2021, 11:11:04 AM »
Glad to see you had some success RC, it's an interesting configuration. That slop in the gear wheel shouldn't be there I'm sure, this would have to throw the accuracy out and I would think it would produce some lift on one side which would show on the facet, cutting deeper on the side closest to you. When one considers the micron accuracy of a facet, slop anywhere in the mechanism is totally unacceptable.

When I think back to servicing the Topaz Tec XT6, all the shafts were in roller bearings with thrust bearings on the joining faces which could be pre-loaded, there was no lose play anywhere.

The Facetron doesn't impress me. :-\

Yes, those Topaz machines look really well constructed.
There are nice bearings present for the Facetron shaft, I must say, with no play present, so no issues when meet-point faceting.
RC
Rough Creations - Beauty from rough beginnings

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