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This new video shows Chris's modified MaxNC 10 mill doing 5-axis milling. A slightly different configuration than the virtual machine in his initial work, this has one rotary moving the work ("C") and one rotary moving the spindle ("B"), requiring a different kinematics module. However, when each machine is run with the appropriate kinematics module, 5-axis XYZBC code has the same meaning on both.
XYZ moves refer to the coordinate system defined by the workpiece, and UVW moves refer to the coordinate system defined by the tool. Chris notes that "I put my 30-60-90 triangle on the table and went to B30. Now the V axis cuts right along it. This is extremely useful."
All this work is in the "w_tool_length" branch of CVS.