groove on face using 5th rotation axis.

[trains420]

Hello, I need to create a groove on the front of the rotating part. For the best possible geometry, I would need to use a rotary axis, but I don't know how to do it. I tried to use the Wrap toolpath and rotary functions, but these only work perpedicular to the axis of rotation. I need to mill in the axis of rotation.
how to do it ?

[mathew.hutton]

Hi @trains420 

Can you attach your project?

Thanks

Mat

[trains420]

here it is

[mathew.hutton]

Hi @trains420 

Thanks for attaching your file. Can you show me a screenshot selecting the geometry that you want to try to machine as i'm unsure what you're referring to here

Thanks

Mat 

[trains420]

I want to mill this groove with a 1mm cutter using a rotary axis.

X, Y are positioned. Only the B and Z axes move (0.05mm per revolution of the B axis).

[mathew.hutton]

Hi @trains420 

Is there any reason in particular that you want to use a rotary or 5 axis toolpath on this though, the geometry is flat with perpendicular walls so i don't see why you'd need a multi-axis toolpath strategy for this? I have had a mess around and i think because you have your machine selected in your setup, you can't access some of the multi-axis toolpath options. If you deselect your machine from your setup it gives you access to these options then. 

Mat

[trains420]

The reason is that when using a rotary axis, I achieve greater geometric accuracy. If I do this with linear X, Y axes, I will have a geometric inaccuracy around 0.05mm. Unfortunately, I will not achieve a better result on this machine at the moment.

a simple example
G00 X3 Y0
G00 Z2
G01 B360 Z-0.1
G01 B360 Z-0.2
...
Is it possible to program it like this in Fusion?

[mathew.hutton]

Hi @trains420 

It sounds like you are describing you want to use polar milling essentially. But this involves revolving around a C axis, not a B axis. The B axis revolves around the Y axis. To machine that slot in the orientation you have your setup in, it would need to rotate the C axis? I'm pretty sure you can activate this in your post by enabling polar mode if you have it set up?

Mat

[trains420]

Autodesk representation in the Czech Republic produces a five-axis postprocessor for me. I bought the 4th and 5th axes recently, and now I'm dealing with everything else. So I'll be able to test this when they deliver it to me.

So if I want to mill this way, it doesn't matter what strategy I use? Could I use 2D contour for this, and then activate polar milling in the postprocessor, and nothing more?

[mathew.hutton]

Hi @trains420 

Yes i think in your case you would program this normally and then when you post the program, you should have the option to force polar mode instead of XY mode. The post should then produce the code for you. I normally don't use polar mode unless the part i am machining exceeds my Y axis range, so then if that is the case, the post automatically forces polar mode. See this thread as reference: https://knowledge.autodesk.com/support/fusion-360/troubleshooting/caas/sfdcarticles/sfdcarticles/How...

Mat

[trains420]

Thank you for the explanation. When I have the postprocessor available, I'll try it. Thank you for now.