Question on v-carve with 1/8" bit

Hi !

I’m trying to understand the limitations of a 1/8" bit and vcarve. I am more versed in Laser work but expanding into CNC for some new projects. I’m testing my issue on a star that is 30 mm tip to tip. What I wanted to do was have the star routed out to the bottom of the stock (7 MM) like the stars tutorial I found here. With vcarve only I get more of a starfish ! With pocket and vcarve I get closer but not the desired result of a smooth taper all the way down.

Is there a way to achieve this in one toolpath with an 1/8" 60 deg. bit that is only as wide as the 1/8" shaft. I assumed the toolpath would just trace around the stars image going progressively deeper and removing the entire middle, but that doesn’t seem to be the end result, instead i get the starfish. Any help would be appreciated !

This is why we switched to Advanced V carving only in the new v8 beta:

The longer answer is:

V carving cuts down the center of a design and can only cut as wide/deep as the tool.

Advanced V carving cuts around the perimeter, and if one wants the field cleared, enable the checkbox for “Pocket Clearing”.

Thanks for the response Will, I’m on build 764. In this build advanced vcarve does what i want
but leaves a flat bottom.
Does the new version 8 change the way this would turn out ?
Or is my only solution in my current build to go to a bit with a wider blade base or can a combination of vcarve and advanced vcarve solve this ? I was getting a ridge between any thing I tried to combine and I think through trial and error of depth I may possibly be able to ultimately achieve it but it seemed like it wasn’t the right way to solve the issue.

The 3rd option would be to model in 3D and cut using 3D toolpaths in Carbide Create Pro.

Yes, you probably want to use a larger tool and “allow the program its head” and let it cut as deeply as it needs to.

Beyond that lie other tools, which save for Alibre, I can’t really speak to.

For a bit more on the Carbide Create aspect, please see:

Thanks Will, I will try the 3d and also start shopping for bits !