Profiling a oval shape

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Neville Bastian
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Profiling a oval shape

Postby Neville Bastian » Thu, Jan 20 2011, 7:38PM

Hi Guys I am not familar with contour manager but my production manager is saying we can't do a oval cutout for a bathroom vanity hole. This seems a bit strange that Ecabinets can't do this.
Can some one confirm if it can or can't.
Thanks
Neville
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Kerry Fullington
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Re: Profiling a oval shape

Postby Kerry Fullington » Thu, Jan 20 2011, 8:12PM

Can,

oval.jpg


Must be done with three point arcs.

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Neville Bastian
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Re: Profiling a oval shape

Postby Neville Bastian » Thu, Jan 20 2011, 8:35PM

Thanks a million Kerry

Did you ply anyone with spiked drinks to spill what is coming up with Ecabinets when you were at Dale?
The Thermwood troops are not letting anything slip.

Thanks Again
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Neville
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Neville Bastian
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Re: Profiling a oval shape

Postby Neville Bastian » Fri, Jan 21 2011, 1:48AM

Hi Kerry,
We are still having trouble on understanding how to use this 3 point arc. Any chances of listing the steps say for a average bathroom vanity basin shape.
If its been answered before just send us the link.
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Neville
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Re: Profiling a oval shape

Postby Bryan J Tanner » Fri, Jan 21 2011, 3:13AM

Neville

I'll have to get back to you on the creating the shape, but could you download a DXF from the supplier and use that??
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Re: Profiling a oval shape

Postby Neville Bastian » Fri, Jan 21 2011, 4:18AM

Hi Bryan,
I guess we could use DXF drawings but it would be easier doing it within Ecabinets and faster in production for us. I know a lot of guys use DXF with the Thermwood and is more powerful than Ecabinets. We are just lasy here in the Hillbilly area of OZ.
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Neville
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Re: Profiling a oval shape

Postby Bryan J Tanner » Fri, Jan 21 2011, 5:38AM

I was thinking more along the lines of using the DXF in the part editor of ecabinets.
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Re: Profiling a oval shape

Postby Bryan J Tanner » Fri, Jan 21 2011, 5:39AM

Whats the basin model?
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Re: Profiling a oval shape

Postby Bryan J Tanner » Fri, Jan 21 2011, 6:32AM

I think you would have to use four 3 point arcs.

Working out the coordinates for each arc would take some thinking about, I'd rather go with importing a DXF if you can get one.

Maybe, I'm wrong on this.

Kerry, I look forward to hearing you wisdom on this.
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Re: Profiling a oval shape

Postby Kerry Fullington » Fri, Jan 21 2011, 9:33AM

Bryan,

It is easier to import a .dxf of an oval from a CAD program or from the manufacturer but in my experience those are both going to be thousands of segments instead of arcs. (I can't find a way to convert the polylines to arcs)
I think control nesting is going to write a line of code for each segment to be cut so I have been doing it with three point arcs in eCabinets. It does take some fiddling around.

Kerry

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Re: Profiling a oval shape

Postby Josh Rayburn » Fri, Jan 21 2011, 9:53AM

That's true Kerry you would get a bunch of little lines and the cut wouldn't look so great.
The CAD/CAM software I use has a feature called 'create splines' and I have the option to do so with lines or arcs, and of course a definable deviation from the original geometry when doing so. This would easily solve the problem.
Could one just create two three point arcs then constrain them?
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Re: Profiling a oval shape

Postby Bryan J Tanner » Fri, Jan 21 2011, 1:32PM

I'd never thought of it like that Kerry. Thank you.

Just so that I am clear, would the attached DXF have that problem?

I can see 16 segments but it looks as smooth as an arc.

Also, I know I'm not half the craftsman most of you are here, but whats the down side to having a slightly messy cut underneath bowl? Ours get done freehand with a jigsaw.

Is it the machine time involved?
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Re: Profiling a oval shape

Postby George Davidson » Sat, Jan 22 2011, 6:21PM

Hi Kerry
Could you send me a DXF that you can't convert the polylines to arcs.If you don't mind I would like to see what you are talking about

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Re: Profiling a oval shape

Postby Kerry Fullington » Sun, Jan 23 2011, 6:50PM

George,

Here is a .dxf I created in DeltaCad. The picture is of one segment after I import that .dxf into eCabinets. As you can see there would be thousands of segments to make the oval. (the red line in the pick box) This really bogs down the Part editor.

segment.jpg


Bryan has the same thing in the outer circle of his .dxf. The inner circle he is cutting is only sixteen segments which is fine but the outer is a great number of segments.
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Re: Profiling a oval shape

Postby Gary Puckett » Sun, Jan 23 2011, 7:41PM

Kerry,

Why not just make a square 17 x 15 and use the three point circle.

Gary
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