Author Topic: How do I select a rotary table?  (Read 4774 times)

Offline zeeprogrammer

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Re: How do I select a rotary table?
« Reply #45 on: July 11, 2018, 09:59:50 PM »
@Jason - I only considered mounting the cylinder horizontally. Mounting it vertically would indeed be problematic.

@Brian - Good point. I do keep my eye on the weight of things. Even with lighter things, like my 4" RT or my milling vise, I take great care on lifting and carrying.
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Offline Jasonb

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Re: How do I select a rotary table?
« Reply #46 on: July 12, 2018, 07:23:49 AM »
Standing it vertically in a vice won't give you that crisp joint where the curve meets the flat you will get a fillet the size of the cutter radius.

Also you would need a long series cutter as your cylinder looks to be about 1.5 long
Thats why you put it horizontally in the vise, use a rod down the bore as a hieght spacer, and make a series of cuts with the bottom of the end mill, rotating the part in the vise between cuts.

It was Marv's suggestion I was commenting on where he said put the vice onto the R/T which would mean having the cylinder vertical. Though Ideal way to do the flanges if the cylinder has them.

Pete, I'll see what I can do.

Offline petertha

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Re: How do I select a rotary table?
« Reply #47 on: January 04, 2019, 05:54:57 AM »
Kind of an interesting variant with a digital angular readout. No experience with or endorsement of, just mentioning.
https://littlemachineshop.com/products/product_view.php?ProductID=2420

Offline Jasonb

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Re: How do I select a rotary table?
« Reply #48 on: January 04, 2019, 07:31:17 AM »
Would be better if it read directly off the table rather than the screw which will not compensate for backlash. Those tables are nicely made though, I have been using the 6" with normal handwheel quite a lot lately as the 72:1 seems to suit more things than my 90:1 table

Offline petertha

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Re: How do I select a rotary table?
« Reply #49 on: January 05, 2019, 03:41:32 AM »
That's a good thought. If it was direct reading like a DRO scale on a lathe or mill, backlash would be a moot point. I suppose being located on the screw its getting the benefit of resolution - more turns of total displacement per degree of table rotation. Come to think of it, maybe a table DRO scale / encoder might have to be a circular around the periphery.

Somewhat related (and yes, he has a backlash workaround).