Eccentric Nuts

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Eccentric Nuts

Postby bdring » Thu Jul 05, 2012 10:25 pm

Here is a new alternative to the eccentric spacers.

http://www.buildlog.net/blog/2012/07/ne ... tric-nuts/

eccentric_nuts.jpg
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Re: Eccentric Nuts

Postby tylerv » Fri Jul 06, 2012 7:26 am

That's pretty awesome.

"Eccentric Nuts" sounds like it ought to be a classification of billionaire, probably an unintended side effect of reading this post at 1:30am local time.
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Re: Eccentric Nuts

Postby canadianavenger » Fri Jul 06, 2012 9:28 pm

Nice,

I remember thinking to myself when I was re-working the ord-bot for the h.ord design that it would have been nice if the spacers were threaded.
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Re: Eccentric Nuts

Postby Liberty4Ever » Fri Jul 06, 2012 10:18 pm

As I was building my Hadron ORD Bot, I briefly wondered about eccentric nuts instead of eccentric spacers, but didn't think about it for long. Glad to see they're a reality. The eccentric nuts are now on the web store.

http://store.makerslide.com/index.php?main_page=product_info&cPath=5_9&products_id=73
Apparently, I didn't build that! :-)
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Re: Eccentric Nuts

Postby evokanivo » Sat Jul 07, 2012 12:45 am

The drawing shows the eccentric nut cylinder height is still shorter than the thickness of the plate it is attached to. Might be nice if they matched, or if it was just slightly smaller - just a thought.
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Re: Eccentric Nuts

Postby bdring » Sat Jul 07, 2012 11:57 am

I don't understand the statement. Draw a picture.

The part that fits in the plate is supposed to be thinner than the plate. I chose a value that is thinner than any reasonable plate. That part needs some decent height or it is more difficult to install or could tear or stretch the hole.
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Re: Eccentric Nuts

Postby Enraged » Sat Jul 07, 2012 5:07 pm

If you added a small chamfer or radius to the buttom edge of the flat faces/corners (during the same operation that cuts the registration diameter), they would help it not tear into the plate. On my shapeoko the paint it all torn away from adjusting the nuts. It doesn't effect the function, it's just esthetics.
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Re: Eccentric Nuts

Postby Liberty4Ever » Sat Jul 07, 2012 6:03 pm

Enraged wrote:If you added a small chamfer or radius to the buttom edge of the flat faces/corners (during the same operation that cuts the registration diameter), they would help it not tear into the plate. On my shapeoko the paint it all torn away from adjusting the nuts.

Wrench on nut to hold it stationary.
Loosen screw one turn.
Rotate nut to adjust.
Tighten screw one turn to tension.

:D
Apparently, I didn't build that! :-)
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Re: Eccentric Nuts

Postby Enraged » Sun Jul 08, 2012 4:56 am

not always that easy, but that would definitely be a huge benefit of these nuts vs the old spacers. trying to turn an allen key, hold a nut, and maneuver a spacer were a bit annoying, hence the scrapped paint.
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Re: Eccentric Nuts

Postby TLHarrell » Sun Jul 08, 2012 10:17 pm

Would a 0.020" thick brass shim under the eccentric help with the paint issue, or would it cause grief with the parts loosening?
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