Cutting into adjacent parts

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Rob Davis
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Cutting into adjacent parts

Postby Rob Davis » Mon, Jun 10 2019, 1:06PM

I tried to search forum for answer but couldn't find a thread.
We ran these in eCabinets and nested at machine but we are\getting the tools running into adjacent parts. Since nested on Rolling Nest, any suggestions?
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Thomas strembitsky
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Re: Cutting into adjacent parts

Postby Thomas strembitsky » Mon, Jun 10 2019, 1:11PM

i've had this issue before and the solution it to add a 0.1 mm radius to the tips and it will prevent it from over shooting
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Thomas strembitsky
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Re: Cutting into adjacent parts

Postby Thomas strembitsky » Mon, Jun 10 2019, 1:22PM

Intel(R) Core(TM) i5-6400 @ 2.70GHz 8.00 GB RAM
NVIDIA GeForce GTX 950
Windows 10 Professional 64-bit
http://www.trueform.ca
CS43 cnc

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Troy Hollinshead
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Re: Cutting into adjacent parts

Postby Troy Hollinshead » Tue, Jun 11 2019, 9:07AM

Years ago when we 1st got our cnc. I had the same issue. Im not possitive since its been a while but im pretty sure I added a part clearance value and that solved my issue.
Clearance.png


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Rob Davis
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Re: Cutting into adjacent parts

Postby Rob Davis » Tue, Jun 11 2019, 9:13AM

Thanks Thomas adn Troy. We've cut angled parts before without his issue but never a whole set of them all together.
We'll likely try the radius end first so we don't add extra space between every part in nest.
:beer:

Thomas strembitsky
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Re: Cutting into adjacent parts

Postby Thomas strembitsky » Tue, Jun 11 2019, 11:05AM

its good as a double check to go in the graph screen and double check that the cuts are going to hit after you have made you changes
Intel(R) Core(TM) i5-6400 @ 2.70GHz 8.00 GB RAM
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Brad McIntosh
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Re: Cutting into adjacent parts

Postby Brad McIntosh » Tue, Jun 11 2019, 11:44AM

Rob,

Gouges caused by angle parts are really a factor based on where the intersection of the two edges projects to. If the projection leads to the exterior of the sheet or to a waste area, then you would never notice. The projection is due to the machine extrapolating the offset of the two edges to the point that they intersect. With a 90° or greater corner, this is not an issue as the intersecting point stays "close" to the part. It is only with very acute angles that the "projected" offset path moves further away - the more acute the angle, the further away the intersection point.

The control can't/won't/shouldn't add any entities to circumvent this. As my post back many years ago (2011) may have alluded to - the very, very small radius that one can add to any acute, exterior angles introduces an tiny, imperceptible, extra arc entity in the resultant tool path. This extra arc then allows the tool to virtually pivot around the sharp corner and not delve into other parts.
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