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### Author Topic: LazyTurn  (Read 1171553 times)

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• 4,908
##### Re: LazyTurn
« Reply #620 on: December 30, 2008, 10:22:48 AM »
HI ART, & All,
Here is a booger.

Where the illustrated arc terminates to a line perpendicular to the centerline, the toolpath will crash the trailing edge of the chosen tool. And the holder leaves the the insert behind.

By simply adding a short "X" (Z) line parallel to the centerline BEFORE the perpendicular line, all is good.

RC

• 4,908
##### Re: LazyTurn
« Reply #621 on: December 30, 2008, 10:34:47 AM »
Also, may be worth noting that the perpendicular line is NOT tangent to the arc.
RC

#### ART

• 1,700
• Tough as soggy paper.
##### Re: LazyTurn
« Reply #622 on: December 30, 2008, 11:26:54 AM »
Hi:

This one is the result of an unwritten rule ( till now. LOL )

Rule: Any rough profile must be possibel with the first pass being a full length cut. Stock must be set large enough in
dimater to allow this. To see what I mean, use the Diags checkbox in the rough generator to see the diagnostic lines,
note how the first pass is broken. Increase the diamter enough that the first pass is a solid line.

This has to do with soem complexities in the reentrant iterative algorithm I wrote for the path calulations. I may revisit at
some point, but at the moment, to ensure the "tree" is correct, the first node ( line) must be a complete line.

( For the mathmatically inclined that probably explains a bit about how Im doing this.. )

Art

• 4,908
##### Re: LazyTurn
« Reply #623 on: December 30, 2008, 12:07:32 PM »
Thanks ART, but....I don't get it. (mathematically challenged)
The stock IS .75" bigger than the part.
There are 5 uninterrupted passes to begin with.
Diags. shown NO breaks in the first 5 passes.
Sorry if I'm missing something THAT obvious.
RC

EDIT: Posted code shows 5 clear passes...but without that short horizontal line, the trailing edge of the tool crashes in the deep groove.
« Last Edit: December 30, 2008, 12:12:17 PM by Overloaded »

#### ART

• 1,700
• Tough as soggy paper.
##### Re: LazyTurn
« Reply #624 on: December 30, 2008, 12:23:11 PM »
Rich:

Sorry, that wasnt the bug I was talking about. When I loaded it, my depth per pass was larger, and then the issue I was talking about happens, the left side goes away entirely.
Im still looking into your issue..

Art

#### ART

• 1,700
• Tough as soggy paper.
##### Re: LazyTurn
« Reply #625 on: December 30, 2008, 12:27:33 PM »
Rich:

Sorry, what size tool is that, I cannot repeat it.. and depth/pass and clearance?

Thx
Art

• 4,908
##### Re: LazyTurn
« Reply #626 on: December 30, 2008, 12:33:36 PM »

RC

• 4,908
##### Re: LazyTurn
« Reply #627 on: December 30, 2008, 01:02:55 PM »
ART,
I noticed that the width/depth relationship of the deep groove has an effect on the path. So I made it PLENTY wide in these 2 DXF's. They are identical except for the small FLAT.

In the following pic., it looks like the diamond tool path is good UNTIL it reaches a depth = to half the length of the diamond, then the depth is fed straight in. This would crash the trailing edge.
It looks proportional to the insert profile. ? ?
RC
« Last Edit: December 30, 2008, 01:04:32 PM by Overloaded »

#### ART

• 1,700
• Tough as soggy paper.
##### Re: LazyTurn
« Reply #628 on: December 30, 2008, 02:02:18 PM »
RC:

in 12.47.gif, thats what Id expect to see. The profile follows the tool inward, so there shoudlnt be any trailing edge hit in that case. The photo looks good to me?

Art

#### ART

• 1,700
• Tough as soggy paper.
##### Re: LazyTurn
« Reply #629 on: December 30, 2008, 02:03:50 PM »
RC:

Ohh, I see what you mean.. thats on purpose though, its assumed the tool can cut on either edge of a tool.

Art