Need help to install 5 axis knematics

I'm also not quite sure this is correct either:

It looks to me more like the center point of the C axis:
X, Y and Z rot-point pins represent are the
offsets of the center of rotation of the C axis
relative to the machine absolute zero
coordinates.

Yeh X offset only make sense with xyzbc machine type, for xyzac Y and Z -offset is important. Now i have to find out where to put my machine Y Z offset value

Thank you so much Aciera!

there are two type of offset you have to handle
1: is the offset between rotation axis depend to machine type, for xyzac machine X and Z offsets are the offsets from the center of rotation of the C axis relative to the center of rotation of the A axis.

2. is the offset X, Y and Z rot-point pins represent are the offsets of the center of rotation of the A axis (pivot point mean intersect point of rotation axis A&C ) relative to the machine absolute zero coordinates

Now i have to find out where to put my machine Y Z offset value

You would put that into your hal file:

Of course you would replace 20 and 10 with your numbers.

then you follow the same pattern for the .x-, .y-, ..z-rot-point values

and again replace the values according to where your C- axis rotation-point is in relation to your home position

2. is the offset X, Y and Z rot-point pins represent are the offsets of the center of rotation of the A axis (pivot point mean intersect point of rotation axis A&C ) relative to the machine absolute zero coordinates

If you look at the document I linked above and also if you study the simulation config the rotation point is the center point on the surface of the C-axis. Not the intersection of the A and the C axis. At least that is how I read it.

linuxcnc.org/docs/2.8/html/motion/5-axis-figures/Figure-6.png

Thanks for very helpful info, i will check it out.