Cut Z is fixed at 0.0

Marius Stanciu

That’s because you don’t understand how the application works. Which is OK since you don’t have much info available.

Understand this: first you do the isolation. The isolation you have to do it at a certain distance which depends on the actual tool diameter such that the Gerber features are preserved.

I say the actual tool diameter because for a circular endmill it is easy, being circular, the tool diameter is always the same regardless of the depth of cut (Cut Z).
But for a V bit things are different: the more you cut in the material, the more is the actual tool diameter due of the shape of the V milling bit: sort-of-conical when in motion. V-shape.

So, when you go to the milling section you have to already know that you will have a certain actual tool diameter. But if you have a V-shape tool diameter with the tip diameter of say 0.1mm, and you already said that you want a isolation distance of 0.1mm... When the Cut Z is calculated by the application, oops: you get 0.1-0.1 = 0.0 mm.
Conclusion: this is not a bug, this is how the application works.
Make sure that the isolation distance is greater than the V-shape tool tip diameter.
Calculate from the isolation stage what kind of tool you are going to use and at what depth of cut (Cut Z parameter), the calculation can be done in the Calculator Tool. I repeat, due of the shape of the tool (V-shape) there is a calculus involved which determine the Cut Z for a given tool (with the tool tip diameter and tip angle) such that a certain isolation distance is preserved everywhere.

2022-10-26T19:25:49+00:00

Comments (5)

Marius Stanciu
Hi,

Set it to negative value so it can cut. Positive values are above the surface, negative are below the material.
- 2022-10-26T00:30:11+00:00
Roshan Pereira reporter
No it's not able to change ,that's why i raise an issue ,when using v bit it's not allowing me to change it ,I've attached files so you can see,i can do a quick video if that would help,thanks Really appreciate your help
- 2022-10-26T17:41:44+00:00
Marius Stanciu
That’s because you don’t understand how the application works. Which is OK since you don’t have much info available.

Understand this: first you do the isolation. The isolation you have to do it at a certain distance which depends on the actual tool diameter such that the Gerber features are preserved.

I say the actual tool diameter because for a circular endmill it is easy, being circular, the tool diameter is always the same regardless of the depth of cut (Cut Z).
But for a V bit things are different: the more you cut in the material, the more is the actual tool diameter due of the shape of the V milling bit: sort-of-conical when in motion. V-shape.

So, when you go to the milling section you have to already know that you will have a certain actual tool diameter. But if you have a V-shape tool diameter with the tip diameter of say 0.1mm, and you already said that you want a isolation distance of 0.1mm... When the Cut Z is calculated by the application, oops: you get 0.1-0.1 = 0.0 mm.
Conclusion: this is not a bug, this is how the application works.
Make sure that the isolation distance is greater than the V-shape tool tip diameter.
Calculate from the isolation stage what kind of tool you are going to use and at what depth of cut (Cut Z parameter), the calculation can be done in the Calculator Tool. I repeat, due of the shape of the tool (V-shape) there is a calculus involved which determine the Cut Z for a given tool (with the tool tip diameter and tip angle) such that a certain isolation distance is preserved everywhere.
- 2022-10-26T19:25:49+00:00
Marius Stanciu
- marked as trivial
- marked as proposal
This is not a bug this is how the application is meant to work.
- 2022-10-26T19:27:20+00:00
Marius Stanciu
BTW, you could always use a Cx tool instead of using the auto-selected V-shape tool and just add a calculated diameter according to your cutting depth.
- 2022-10-27T12:19:38+00:00
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