CNC Router Rotary Axis Makes Cabriole Leg 

There was a short period when the Fusion rotary CAM functionality was available to hobbyists, and I played around with it in simulation. Seemed to work fine, and it convinced me to try my hand at building a rotary axis. By the time I got it built, Fusion took the CAM rotary axis function away from hobbyists; that led me to Deskproto. Deskproto works pretty well especially given its reasonable cost for hobbyist use. I am surprised you are having trouble with rotary axis on Avid-Mach4- Fusion. My impression is Avid provides good customer service; have you reached out to them? I have no experience with Mach4. Good luck and thanks for watching.

Sorry, I am not sure what area you are asking about. Can you give a time reference on the video where this area shows up?

@@richardevans6891 15:31, it is the "shin" area of the leg. It is exactly the area that is below z=0. It is looking sort of flat or at least not rounded like other parts. I have heard that that part is actually very very sensitive to correct zeroing of the bit and slight mistakes can lead to such problems, so I was just trying to make sure, if you also found that to be the reason.

​@@pradeepdatta7577 I did not determine the exact cause of this defect. As you surmised, it is the area where machining below the axis of rotation is required. I am not sure if the problem was an error in my zeroing on the rotation axis, or if it is an issue in the tool path created by the Deskproto software. Around 13:22 you can see how awkward the tool path seems where the side of the tool (rather than just the tip) seems to do some cutting; and this side cutting action may be the source of the problem.

@@richardevans6891 Ah ok. I just remember it being mentioned some place, that that part is extremely sensitive to the tip being zeroed perfectly otherwise a flat area or a ridge can remain. It is truly an awkward area, but I think you did a pretty good compromise. Thumbs up for you!

I use Fusion 360 for both design and tool paths. It is available from Autodesk for personal-use-only at no cost.

Hello Zeerabox, the Roughing pass took 1 hour and 7 minutes and the Finishing pass took 1 hour and 20 minutes, for a total machining time of 2 hours and 27 minutes. Thanks for watching.

In my machine, when in "rotary axis mode", the Y axis is disabled so the Y axis cannot move at all. In the rotary MACH3 profile, the drive that would normally be used for the Y axis is reassigned to the rotary A axis. Thanks for watching. Thanks for watching.

@@richardevans6891 Did you give the machine a line of cocaine before starting?

Hello Parmoor gunstocks, you can email me at: woodworker5@comcast.net

Hey, you were warned at 0:20. Sorry.

@@richardevans6891 OK, sory.