roughing issue?

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roughing issue?

Postby epicycloid » Sat Jul 20, 2019 2:03 am

I am still a rank beginner with Aspire, but making headway.

I ran into an issue I don't understand today working with tileable textures. I'm trying to create a faux frame, a 2" border around a cabinet door panel, and have the tileable texture fill the area inside the "frame" as a recessed pattern.

I laid out a pattern, and created a finishing toolpath with a 1/16" ball end mill. Everything looked good. Then I decided to go back and add a roughing toolpath to clear away some of the material before the finishing toolpath, giving the small ball end mill a breather. I selected a 1/4" end mill for the roughing.

The problem is that the roughing toolpath "chewed" notches out into the faux frame area. Two images are attached showing how the roughing toolpath chewed into the frame, while the finishing toolpath left it intact.

Am I missing some setting to keep the roughing toolpath in bounds?

Thanks for any hints and help.
Attachments
Roughing Added.jpg
Image with roughing toolpath added
Without Roughing.jpg
Image showing finishing toolpath alone
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Re: roughing issue?

Postby Rcnewcomb » Sat Jul 20, 2019 2:22 am

Am I missing some setting to keep the roughing toolpath in bounds?

The roughing toolpath will move the CENTER of the roughing bit to the vector boundary
The Help text reads:
The center of the tool will go to the edge of the specified boundary.


The finishing toolpath will move the EDGE of the finishing bit to the vector boundary

Either offset inward for the roughing pass, or offset outward for the finishing pass.
- Randall Newcomb
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Re: roughing issue?

Postby epicycloid » Sat Jul 20, 2019 4:04 am

Wow, thank you. That's pretty subtle and I clearly overlooked the difference between the two toolpaths. It would have taken me a while to figure that one out.

I can see now that using Boundary Offset can be used to keep the bit inside the X-Y envelope, while Machining Allowance deals with the material left in Z.
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Model of CNC Machine: Custom router with Dynomotion KFLOP


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