Let’s say, for example, you have a part that takes some machining at some angle 
to the parts normal X, Y, and Z.  My CAD/CAM software will let me pick a 3D 
face and will align to that for generating the code.  Is it possible to do 
something similar with LinuxCNC?  like if you need to machine a flat and drill 
a hole at 45 degrees between the X and Z, can you rotate the CNC coordinate 
system 45 degrees about the Y axis so that when you jog X, the machine moves X 
and Z at a 45 degree angle, and when you jog Z, the machine moves Z and X at 45 
degrees (90 degrees from the X jog).

This jogging at an angle would be used to indicate the part and touch off the 
normal X and Z surfaces to properly align the part for machining the geometry 
at an angle.

Sorry for my ignorance for the kinematics but I’m envisioning something like 3D 
trig where you can rotate the coordinate system in 3D, use jogging for aligning 
and touching off the part, then go back to machine coordinates and machine the 
geometry at the correct location and angle.  Otherwise it seems difficult to 
stick a part in the vise at 45 degrees and position a hole as some coordinate 
from angled surfaces.

Another thought that may be similar, if you could use probe input, you could 
rotate the part and touch off 3 points to define the planes for top, side, & 
end (XY, XZ, & YZ ?).  I thought this might already be possible because I’ve 
read the LinuxCNC can do 6 axis (X,Y,Z, and A,B,C).

Any thoughts?  Can variables be used or calculated for rotating the machine 
kinematics (or coordinate system) to aid positioning parts at odd angles for 
machining?

RogerN
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