salt boxes

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Re: salt boxes

Postby adze_cnc » Tue Apr 30, 2019 4:58 pm

Hello,

Thanks for the files (I'll have a look). I noticed that the project page has been updated to read Aspire only.
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Re: salt boxes

Postby adze_cnc » Tue Apr 30, 2019 9:51 pm

I had a look at the STL and VCarve files. Phooey on STL!

I extracted the profile of the bowl in Rhinoceros from the STL file (mostly successful). I then used that profile for moulding toolpaths. Surprisingly the moudling toolpath actually behaved as I thought it should---usually I have no real luck with the moulding toolpath and tend to curse it.

Attached is a simulation image and the CRV file with moulding toolpaths in ZIP form. Note: there are no toolpaths for the lid. Also, the lid vectors had two spots where they loop back on themselves. This has been corrected.

I hope this will be useful for other VCarve users who might want to try to make one of these.

Thanks,
Steven

2bowl (mouldings).jpg
Salt cellar using moulding toolpaths
Attachments
2bowl (mouldings).zip
Original CRV file from "sawmiller" altered to use moulding toolpaths
(238.06 KiB) Downloaded 38 times
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Re: salt boxes

Postby sawmiller » Tue Apr 30, 2019 9:55 pm

Thanks.
I did not even consider looking at those lids since they were just resawn 3/4" boards, sorry about the mixup
woodmizer sawmill and joe's hybrid cnc, a good combination
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Re: salt boxes

Postby sawmiller » Tue Apr 30, 2019 9:56 pm

I will gave to look at the molding toolpaths, havent used them much
woodmizer sawmill and joe's hybrid cnc, a good combination
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Re: salt boxes

Postby sawmiller » Tue Apr 30, 2019 11:35 pm

i see how you did that steven, interesting.
guess im too dependant on 3d shapes.
but why did you do it in sections ?
could select all the bowl rims,then profile and it will cut them out as one toolpath.
?
woodmizer sawmill and joe's hybrid cnc, a good combination
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Re: salt boxes

Postby adze_cnc » Wed May 01, 2019 4:50 pm

The beauty of the moulding toolpath is that it varies the stepover the more vertical the slope providing smoother walls.

I mentioned that I find the moulding toolpath (MT) exasperating and I guess this was one of those times---despite the brave face of my previous post:

  1. despite the profile being 1.5" long the MT wouldn't initially calculate as there were "overlaps" so I needed to make the profile 1.495" just to avoid that. Really the MT should have been able to rotate the profile 360 deg about the circle perfectly.
  2. when using the full circle as a rail the MT would only give a toolpath "outside" the circle. I tried all combinations of reverse direction and mirroring the profile
  3. MTs need to be created one at a time. You can't apply one to both circles.

So I just split each circle in half and created a separate MT for each arc. Tiresome, but it is what it is. Even with the split if you look to the centre of the circle you will see the profile not really being rotated about a common central point.

Steven
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Re: salt boxes

Postby Creation in Wood » Fri Jun 07, 2019 3:06 pm

Thanks for sharing
Thank You
Doug
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