CNC Router no longer works with Fusion 360

[mdales]

Since the controller was upgraded to the DM500, it seems that certain g-codes that Fusion 360 generates cause the machine to move very quickly over a short distance, and as a result it loses it's home offset, making the machine dangerous to use.

Graeme and I did some investigation and it seems the easiest way to trigger this is with the lead-in operation, where it issues a G2/G3 Arc move with a change in Z.

At times it lost as much as 30mm in Z accuracy, making this bug a show stopper for using Fusion 360 with the router, as such I've added a sign to the router indicating Fusion 360 tool paths are not to be used.

[mdales]

I've since had a session where I went through the settings to see if there was anything else I could find that might fix the issue. There is an option in the controller to turn on/off hardware supported arcs, but AFAICT this didn't have any impact.

[mdales]

We know that the Masso unit (scheduled for testing in #9 ) is compatible with Fusion 360.