Two rail sweep issues

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Gocarter
Vectric Apprentice
Posts: 68
Joined: Sat Sep 17, 2016 1:56 am
Model of CNC Machine: PDJ pilot pro
Location: Calgary Alberta

Two rail sweep issues

Post by Gocarter »

I could use some help.
I'm programing a cut for a table edge. I want a uniform taper. When I do a round table, it works great.
table edge round.jpg
table edge round drawing.JPG
When I try to do the same thing with an oval, the edge thickness is inconsistent. I understand why, I think. It is calculating to the furthest edge of the oval, so at the narrow part it is thicker. Is there a way to keep it uniform that anyone knows of?
table edge oval edge diffference.JPG
table edge oval drawing.JPG
Attachments
table edge oval.jpg

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dealguy11
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Posts: 2487
Joined: Tue Sep 22, 2009 9:52 pm
Model of CNC Machine: Anderson Selexx 510,24x48 GCnC/WinCNC
Location: Henryville, PA

Re: Two rail sweep issues

Post by dealguy11 »

Should not come out inconsistent if the distance between the 2 drive vectors is constant all the way round. It doesn't look like you did that. Also, I suspect the problem is that you did not put legs on your sweep vector. It should look like this:
legs.JPG
Also, the start points of the two drive vectors need to be on the same relative places on their ellipses, like this:
Legs2.JPG
Edit:

Just tried it with different sized ellipses for the drive vectors and that didn't cause the problem as long as Scale Cross Sections with Width was unchecked.
Last edited by dealguy11 on Mon Dec 31, 2018 10:41 pm, edited 1 time in total.
Steve Godding
Not all who wander (or wonder) are lost

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jimwill2
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Model of CNC Machine: CaMaster Stinger w/recoil, FTC
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Re: Two rail sweep issues

Post by jimwill2 »

I believe if uncheck "scale cross sections with width" in the two-rail sweep creator it will be uniform.
Jim Williams

Gocarter
Vectric Apprentice
Posts: 68
Joined: Sat Sep 17, 2016 1:56 am
Model of CNC Machine: PDJ pilot pro
Location: Calgary Alberta

Re: Two rail sweep issues

Post by Gocarter »

Wonderful! Thank you so much. That really helps. Saved me a lot of time.

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