V Wheel Woes

Assembly questions and answers for the Shapeoko 3 CNC Mill
Chembro
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Joined: Sat May 09, 2015 3:09 pm

V Wheel Woes

Post by Chembro » Fri Sep 11, 2015 8:06 pm

Today is a tragic day for machine #48

A V wheel decided to come apart rendering my z axis useless.

Are these the same as the makerslide wheel so I can order a bunch of them? I didn't realize these things were plastic.

Image
Last edited by Chembro on Thu Feb 11, 2016 1:55 am, edited 1 time in total.

WillAdams
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Re: V Wheel Woes

Post by WillAdams » Fri Sep 11, 2015 8:15 pm

Chembro wrote:Today is a tragic day for machine #47

A V wheel decided to come apart rendering my z axis useless.

Are these the same as the makerslide wheel so I can order a bunch of them? I didn't realize these things were plastic.
Yes. Delrin as noted on the wiki: http://www.shapeoko.com/wiki/index.php/Parts#All_Axes --- there’s a list of sources / vendors --- anyone know of any others?
Shapeoko 3XL #0006 w/ Carbide Compact Router w/0.125″ and ¼″ Carbide 3D precision collets

CastIrony
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Re: V Wheel Woes

Post by CastIrony » Fri Sep 11, 2015 9:24 pm

Any idea what caused that?
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Brian Stone
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Re: V Wheel Woes

Post by Brian Stone » Fri Sep 11, 2015 9:31 pm

That's what I'm wondering, too. Unless it fell off and got caught by the end mill. I don't see how it could get chipped like that, otherwise. Interesting case.
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WillAdams
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Re: V Wheel Woes

Post by WillAdams » Fri Sep 11, 2015 9:34 pm

Molding flaw when the rod was formed?

Send the picture to support@carbide3d.com
Shapeoko 3XL #0006 w/ Carbide Compact Router w/0.125″ and ¼″ Carbide 3D precision collets

Chembro
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Re: V Wheel Woes

Post by Chembro » Sat Sep 12, 2015 1:53 am

Well it's somewhat of a freak accident.

So I was milling holes into a sheet of phenolic when the machine didn't lift up far enough on one of the hole exists, it dug through 3/8in thick CE phenolic at warp speeds. It was a quick movement to the next hole which broke the material free from the supports and caused the z axis to experience some major forces.Since the material was now bouncing around on the mill and the z axis, for some god awful reason, made a crucial plunge into one of my threaded t-nuts in the bottom of the wasteboard doing tons of damage.

Luckily I was able to patch up the wasteboard with some wood filler till someone starts selling an upgraded wasteboard but the v-wheels took a lot of hell.

TomO
Posts: 171
Joined: Mon Dec 29, 2014 1:19 am

Re: V Wheel Woes

Post by TomO » Tue Oct 13, 2015 8:03 pm

I broke a v wheel on my z axis today - looks almost identical to the OP's photo. Anyone have concerns using these wheels with the expansion kit, with the added weight/stress?

AnonymousPerson
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Re: V Wheel Woes

Post by AnonymousPerson » Tue Oct 13, 2015 8:11 pm

Might be time for some anodized titanium bearings (with thin Delrin coating) instead. :D
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whimmel
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Re: V Wheel Woes

Post by whimmel » Thu Oct 15, 2015 2:50 pm

Openbuilds still offers the steel v-wheels too. You'll probably want to hard-anodize your rails though.

WillAdams
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Re: V Wheel Woes

Post by WillAdams » Thu Oct 15, 2015 3:01 pm

Hard anodization won't stand up to steel wheels. It's a nice idea, and in theory should work, but in practice, doesn't --- at least I've not found anyone reporting long-term success.

The best option seems to be increasing the number of V-wheels --- a couple of people have reported improvements doing thus.
Shapeoko 3XL #0006 w/ Carbide Compact Router w/0.125″ and ¼″ Carbide 3D precision collets

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