Howdy,
I have been using Aspire for about 6 months, and I have gotten the hang of a lot of it. Most of my questions have been solved by searching here, or other sites. This one has me stumped. I am not even sure how to search for an answer.
I am tool pathing a guitar neck I modeled. when I do a 3D finish pass, the bit wants to jog up and down at the heel of the neck. I ruined a few test blanks until I actually looked at the toolpath. THis has come iup in other models I have built. Any help in helping me to understand this would be appreciated. Thanks so much, Mel
Wacky Tool Path
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- adze_cnc
- Vectric Wizard
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Re: Wacky Tool Path
Some will call this “sewing machiing”. It happens when the finish toolpath is riding along the edge of a near vertical plane. When calculating the position in space sometimes the maths say the z is at the bottom of the “cliff” and other times that math says it is at the top.
You could create two separate boundaries: one for the nech and one for the heel. You would 3D finish the neck as you do now and the heel using a raster path perpendicular to the length (that is across the heel).
There are many other methods to try such as using a boundary that prevents the toolpath going over the “cliff” and then following up with a 2D profile path.
You could create two separate boundaries: one for the nech and one for the heel. You would 3D finish the neck as you do now and the heel using a raster path perpendicular to the length (that is across the heel).
There are many other methods to try such as using a boundary that prevents the toolpath going over the “cliff” and then following up with a 2D profile path.
- Rcnewcomb
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Re: Wacky Tool Path
Here is an example of the problem, and how I handle it.
I have a design where you will notice the toolpath preview shows the finish tool path occasionally dropping off the edge. Normally I use a boundary vector, and my boundary offset is slightly over 1/2 of my bit diameter. But in the case that causes the tool to occasionally drop off the edge. Therefore I would reduce the offset to something smaller until the problem disappears. In this example an offset of 0 works fine.
You can even specify a negative offset. Try an offset of -0.5 and preview it, just to give you a better understanding of how the offset works.
I have a design where you will notice the toolpath preview shows the finish tool path occasionally dropping off the edge. Normally I use a boundary vector, and my boundary offset is slightly over 1/2 of my bit diameter. But in the case that causes the tool to occasionally drop off the edge. Therefore I would reduce the offset to something smaller until the problem disappears. In this example an offset of 0 works fine.
You can even specify a negative offset. Try an offset of -0.5 and preview it, just to give you a better understanding of how the offset works.
- Randall Newcomb
10 fingers in, 10 fingers out, another good day in the shop
10 fingers in, 10 fingers out, another good day in the shop
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Re: Wacky Tool Path
Thanks for the info gents. Very kind!