4-Axis Milling with Rotation about c-axis

[Anonymous]

Hi,

I'm looking to do 4-axis machining for a very specific application. This application requires x,y and z movement as well as rotation in the z-axis (or c-axis rotation). This means that I need the part to rotate about the same axis that the drill bit is in. 

I am new to Fusion, but any rotation seems to be turning it into a lathe, or x/y-axis rotation. Is it possible to have the drill in the same axis as the rotation part?
NOTE: For this application, I need to rotate in z, followed by a straight line in x/y, and then rotate again. Therefore, it is not pure rotation in the c-axis as there will be linear movement in addition to the rotation.

Thank you for your help!

[seth.madore]

Please export and share your .f3d file so we can provide better assistance. To do that:

File > Export > Save to local folder. Return to thread and attach the .f3d file in your reply.

If the file contains linked component, the links must be broken. If the file cannot be shared due to privacy concerns, you can email me the file: seth dot madore at autodesk dot com

[Anonymous]

Hi Seth,

Attached is a sample part just quickly made to give you an idea of what I need to do. I need to rotate along the curves in the pocket, while go straight along the straight parts in the pocket. 

For a better understanding, the application is to glue the walls of the pocket (Not actually mill it). Therefore, the bit has to be in line with the part at all times to glue. 

Thank you

[seth.madore]

Ok, so I think I still need a bit more info. What sort of machine kinematics do you have? What post processor are you planning on using?
With the sample you provided, your part would easily be solved by a C axis lathe, no Y axis required

[Anonymous]

I am planning on using what is basically a 3 axis CNC machine with an additional stepper motor. The z movement is in the head and the x/y is in the base of the machine. I am planning on mounting the stepper motor upright onto the base. This seems to be an uncommon application where the bit is parallel with the c-axis. 

We will be using Fusion 360 and Mach 3.

I believe, as the rotation is about the center of the part, that when it rotates along the curved surface it may require simultaneous x/y movement and c-axis rotation to achieve consistently hitting the sides of the wall.

Thanks