Angled Z axis cut

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nzlowie
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Angled Z axis cut

Post by nzlowie »

Hi guys

I've got Vcarve pro and I'd like to do a cut in the Z axis but on an angle. So I want to cut a pocket in say 19mm mdf with the sides cut at a set angle, so the tool would move in say the X axis as it was going down in the Z axis.

How could I do this?

Thanks Dave

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mezalick
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Re: Angled Z axis cut

Post by mezalick »

Unloosen your router or spindle and adjust the angle as needed....( don't forget to reset your alignment of the Z when you're finished )
Or purchase a 5 axis machine..
Or, make a 3-D component for the shape and cut as a component...


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Leo
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Re: Angled Z axis cut

Post by Leo »

Dave,

Can you post a picture of what you want to do.

You can draw a sketch, take a digital photo, post it here.

Not entirely sure what you want to do.
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kilrabit
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Re: Angled Z axis cut

Post by kilrabit »

You can use a tapered bit that is close to the angle you want and just make that pocket edge.

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Re: Angled Z axis cut

Post by 4DThinker »

Using the fluting toolpath, or even the moulding toolpath you can make the sides of a pocket sloped. This assumes no sides are undercut.

With the fluting toolpath you need a linear array of short vectors that are as long as your want the bit to move in the x direction.
With the moulding toolpath you need a section view of the slope, and a guide line to "extrude" the slope across your pocket edge.

When I do sloped pockets I always remove the center area first as a normal pocket, then flute or mould the edges. I prefer the fluting toolpath.

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Re: Angled Z axis cut

Post by sharkcutup »

angled cut z axis.jpg
14" by 21" x 1" Thick board with an angled cut 3" by 7" from board Center to outside board edge

As 4DThinker said a fluting toolpath can achieve angled cuts it is just a matter of how steep you want the angled cut in the thickness of material being cut into.

Do you have an image or drawing of what you are trying to achieve? If So post it and we here on this forum.

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nzlowie
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Re: Angled Z axis cut

Post by nzlowie »

Thanks guys

I was thinking about this after watching some video’s on CNC dovetails. I’m thinking of making an attachment for my CNC router to mount the router level with the table, eg 90deg from the vertical.
This way I could cut the dovetail slots with a normal dovetail bit by lowering the Z axis and using the Y axis to get the spacing. For the pins I’d use a straight bit coming down at the same angle as the dovetail bit, think these are around 20deg.
What do you think, worth a try??
Dovetails.jpg

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Adrian
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Re: Angled Z axis cut

Post by Adrian »

The usual way is to mount the material vertically at the end of the machine or you can use the dovetail gadget which does it on the flat but does have slight gaps at the corner. There are also special bits available that do dovetail cuts on the flat.

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Leo
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Re: Angled Z axis cut

Post by Leo »

If you could do this
dovetails.jpg
Then JointCAM is a fantastic dovetail software
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nzlowie
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Re: Angled Z axis cut

Post by nzlowie »

The trouble is my machine hasn't go the provision to cut beyond the bed so can't do vertical cuts. Easy enough to build a 90deg mount for the router if I can figure out how to move Z in the Y direction.

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Leo
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Re: Angled Z axis cut

Post by Leo »

My machine did not either.

I cut the table top and built the vertical clamping, then designed and fabricated the dovetail jig.

When not using the dovetail jig, I replace the table top.

Your restriction may be if you have the ball screw or mechanisms under the table.
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nzlowie
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Re: Angled Z axis cut

Post by nzlowie »

Thanks guys, looks like I'll have to go back to the drawing board....

Appreciate your thoughts.

Dave

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Re: Angled Z axis cut

Post by Rcnewcomb »

While you are going back to the drawing board you may wish to consider looking at joints that be easily done with a CNC machine: 50 Downloadable Digital Joints For Woodworking

Image
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Re: Angled Z axis cut

Post by ger21 »

Nice setup Leo. Mind if I borrow that picture?
Gerry - http://www.thecncwoodworker.com

nzlowie
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Re: Angled Z axis cut

Post by nzlowie »

Rcnewcomb wrote:While you are going back to the drawing board you may wish to consider looking at joints that be easily done with a CNC machine: 50 Downloadable Digital Joints For Woodworking

Image
Wicked, thanks. I'll check them out!

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