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IndustryArena Forum > CAM Software > MadCAM > V carving text on circumference of a cylinder

# Thread: V carving text on circumference of a cylinder

1. ## V carving text on circumference of a cylinder

I am trying to v carve (engrave) text on the circumference of a cylinder using a 90 degree V-bit (or 45 degree taper tool in madCAM). The toolpath generated does not appear to move in the Z axis, only X and A.
It does appear to work on a 2D test, as demonstrated in the tutorial video, but not around a cylinder. Has anyone figured out how to do this?

2. ## Re: V carving text on circumference of a cylinder

Which tools are you using , it seems that you have Z movement above the surface for rapids but not below the surface for cut movements ?

3. ## Re: V carving text on circumference of a cylinder

Yes, you are correct...I do have Z movements above the material but not cut movements. I am using a 45 degree tapered tool (V bit)

4. ## Re: V carving text on circumference of a cylinder

Do you have a negative value for your Z depth cut below the surface?

5. ## Re: V carving text on circumference of a cylinder

Sorry I meant to ask which tool path your using in madcam , are you using cut between 2 curves or one of the other 3D cut along curves ?

If your using cut along curves you can enter a negative value for. Curves on the surface or put your line at the bottom of the cut and enter a positive value .

Hope that helps

6. ## Re: V carving text on circumference of a cylinder

I'm using From Boundary Curves...I'm following the info in this tutorial video and applying the same strategy to a cylinder. The flat test appears to be doing what it should but the rotary doesn't.

7. ## Re: V carving text on circumference of a cylinder

So it looks like from the way the cutter rapids in Z 90 to the surface your using 4 axis between curves , when I use the same set up I get below surface cutting .
But I do not see how one would control the depth other than the cutter will try to plunge to have to 2 sides of the taper always touch the outside lines thus Z height should change upwards where the lines are closer and downwards with wider lines

The only odd thing I get is it almost crashes rhino to use the simulator

I will try to find time later to play with it more

8. ## Re: V carving text on circumference of a cylinder

Is your origin and or cplane at Z zero? Try raising it to the depth you want your cutter to go

Sorry, 4th axis part. That doesn't apply. Madcam website there is an update for v carving

9. ## Re: V carving text on circumference of a cylinder

One thing I noticed if the cutter is too wide it will not drop the Z height much , try and create a tool in madcam tool library that has a narrower cutter angle and see if that helps

10. ## Re: V carving text on circumference of a cylinder

such a informative