Issues configuring CNC Grinding machine

[juliancardro]

Hi, I have an issue with a custom 4 axis CNC machine I created and imported to the Machine Library. The machine is a CNC grinding wheel, which has the purpose of moving the part or Stock  material, using 4 axis, into the abrasive face of the grinding wheel. Because of this CNC machine has a unique kinematics for its axis. The machine has 2 linear axis and 2 rotational axis on the table side and a stationary cutting wheel or grinding wheel as the tool that “cuts” or abrasive agent.

The working principle is that the 4 axis moves and rotates the “stock” into the correct position and then presses the part/”stock” into the grinding wheel, hence cutting off un necessary material. So the cutting tool and “Head” are both stationary in linear movement , and only the grinding wheel or “cutting tool” rotates. All the kinetic movement is made from the table and the “Part” that will be cut.
But once the machine is imported and is working as intended in “Machine Maker”, I am not able to import a tool correctly and the process paths and steps it takes are incorrect, since the tool is still the one moving, not the “table”.

How can I specify the correct orientation for my tool and how do I make sure that the paths the simulation shows would be correct?
Is there a specific processor that I need to use?

The movement the machine needs to do is written as a step by step here:

CNC Gem Cutting Machine: Home Location and Work Area Definition

1. Home Position:
• Defined as the coordinates (X, Y, Z) = (0, 0, 0).
2. X-Axis:
• X = 0 is located at the center of the cutting area and is stationary.
3. Y-Axis:
• Y = 0 is positioned on the left side of the cutting plate.
4. Z-Axis:
• Z = 0 is at the top of the left side of the cutting plate.
5. B-Axis:
• The B-axis rotates 90 degrees around the Z-axis.
6. C-Axis:
• The C-axis is mounted on top of the B-axis and features 96 indexed positions.
7. Cutting Starting Point (CSP):
• The CSP on the Y-axis is defined as Y = 10 mm (Y = 0 + 10 mm).
• The CSP on the Z-axis is also set at Z = 0.
8. Maximum Cutting Area:
• The maximum cutting area extends from the CSP (Y = 10 mm) to Y = 50 mm (CSP + 40 mm) to the right.

[a.laasW8M6T]

Hi

Fusion isn't really a "universal" machine builder, currently its designed for simulating up to 5 axis MILLING machines

For machines that can currently be simulated by Fusion you require a minimum of 3 Cartesian linear axes(and no more than 3) and up to 2 rotary axes.

These rotaries can be head/head, head/table and table/table.

For a machine such as you describe I don't believe there is a way of correctly defining it and having it simulate correctly, I'm not even sure you would be able to generate toolpaths that do what you are thinking.

It is possible that in the future once the ability to simulate Turning/Millturn machines becomes available that you could define a machine that does what you want, but not right now

[juliancardro]

Thank you for your response to my question, I appreciate you taking your time to clarify the current state of fusion 360 when it come to simulating more complex machines.
Would you know of any other software for machine simulation or user that has tried manipulating Fusion in this way?

Thanks again for your insight and help.

[a.laasW8M6T]

Hi

There are many other machine simulation software's like Vericut that can simulate more complex machine types

https://cgtech.co.uk/component/k2/item/174-specialty-cnc-machines.html

Also  possibly eureka: https://www.roboris.it/en/home-2/

BUT these are quite expensive software and they are still primarily used for milling turning and wire cutting application.