V-wheels stopped by new on-rail belt clips?

samc99us
Posts: 270
Joined: Mon Nov 11, 2013 5:20 pm

Re: V-wheels stopped by new on-rail belt clips?

Post by samc99us » Fri Dec 06, 2013 6:32 pm

Will,

I could run some load analysis if needed but I think it's overkill. You shouldn't be seeing much side loading on the belt, and as such only need enough material to prevent the belt from sliding out, and from cutting the material. I think this mod is OK to perform, but a smarter idea is to put the belt tensioning mechanism in the supports for the y-axis.

Best Regards,
Sam
Modified Shapeoko 2: 1500mm fully supported y-axis, 1000 mm 4060 x-axis, ACME Belt Drive Z-axis, Dewalt DNP611, full aluminum t-slot table, 4x NEMA23 180 oz/in stepper motors driven by a G540

WillAdams
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Re: V-wheels stopped by new on-rail belt clips?

Post by WillAdams » Fri Dec 06, 2013 6:43 pm

Not worried about side-loading, rather twisting or torsion.
Shapeoko 3XL #0006 w/ Carbide Compact Router w/0.125″ and ¼″ Carbide 3D precision collets

samc99us
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Joined: Mon Nov 11, 2013 5:20 pm

Re: V-wheels stopped by new on-rail belt clips?

Post by samc99us » Fri Dec 06, 2013 7:57 pm

All the loads are still transferred to a single pivot point, the bolt. So the belt clip twisting parallel to the rail still a concern. Torsionlly, you loose the support of the makerslide on one side of the clip, but there is no way around that without a totally different belt design.
Modified Shapeoko 2: 1500mm fully supported y-axis, 1000 mm 4060 x-axis, ACME Belt Drive Z-axis, Dewalt DNP611, full aluminum t-slot table, 4x NEMA23 180 oz/in stepper motors driven by a G540

benjaminellison
Posts: 2
Joined: Tue Nov 05, 2013 10:43 pm

Re: V-wheels stopped by new on-rail belt clips?

Post by benjaminellison » Sat Apr 26, 2014 4:20 pm

So what size does this modification make your workable area? I'm trying to figure out the best way to get a full twelve x twelve inch edge-to-edge

cvoinescu
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Re: V-wheels stopped by new on-rail belt clips?

Post by cvoinescu » Sat Apr 26, 2014 10:26 pm

These belt anchors (link is to my own shop) give you back the few centimeres you lose because of the stock Shapeoko 2 belt anchors.
Proud owner of ShapeOko #709, eShapeOko #0, and of store.amberspyglass.co.uk

benjaminellison
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Joined: Tue Nov 05, 2013 10:43 pm

Re: V-wheels stopped by new on-rail belt clips?

Post by benjaminellison » Mon Apr 28, 2014 4:46 am

I saw those on one of your other posts - they look great. So with those clips on, what's the workable area on the Shapeoko 2?

cvoinescu
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Re: V-wheels stopped by new on-rail belt clips?

Post by cvoinescu » Mon Apr 28, 2014 8:08 am

It's about 4 mm less than the difference between the width of the motor plate (160 mm) and the length of the rail (500 mm) -- so about 336 mm by 336 mm.
Proud owner of ShapeOko #709, eShapeOko #0, and of store.amberspyglass.co.uk

RobCee
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Location: Birmingham, UK

Re: V-wheels stopped by new on-rail belt clips?

Post by RobCee » Mon Apr 28, 2014 1:36 pm

The belt anchors from cvoinescu are great, they give you back the extra space in X&Y that the stock anchors block.

The only thing to watch is that with the increased range, the X-Axis movement will now foul when the wheels on the underside of the Carriage hit those on the top of the Y-Axis, which is a bit tricky to see unless you are looking for it.
ShapeOko2 #3400 - Chinese 800W AC Spindle - Stiffened X-Axis - TR10 Z-Axis - Inverted Z Motor - Hall Effect Limits - Drag Chains & Custom Brackets

Threefer
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Re: V-wheels stopped by new on-rail belt clips?

Post by Threefer » Mon Apr 28, 2014 6:06 pm

RobCee wrote:The belt anchors from cvoinescu are great, they give you back the extra space in X&Y that the stock anchors block.

The only thing to watch is that with the increased range, the X-Axis movement will now foul when the wheels on the underside of the Carriage hit those on the top of the Y-Axis, which is a bit tricky to see unless you are looking for it.
I just sanded the outside lip of the interfering smooth idler until the bottom V-wheels on the X were able to clear. I have almost a 13 x 13 inch travel now.

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Shapeoko# 3456, Makita RT0701c. Stock size for now but have 13"x13" travel by trimming down belt clamps and lip on smooth idler. Dovetailed wooden track clamping setup. Dust shoe in works.

Little Hands
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Re: V-wheels stopped by new on-rail belt clips?

Post by Little Hands » Tue May 20, 2014 5:26 pm

I pulled the belts thru the small slot in the "open end plates" just above the Y axis rails and mounted the belt clips (see photo). This gives me full travel in Y axis.
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