Tilt Table Axis Shift for swarf

[jplecan]

I am experimenting with 5 axis swarf toolpaths and want to incorporate a z axis shift for a tilting rotary horizontal machine. I sent a zip file to the FTP's mc9 folder called swarfshift.zip which contains a swarfshift.mc9

file and mpgen5ax based post files called bosto5x with a z axis shift of -7.200. The geometry is an arch shaped surface

to which a swarf toolpath is applied. If you open the geometry a green pt is at the part zero and a blue pt at the secondary axis pt of rotation. The green pt with attached line is where I expected the center of the tool to be at the top of the arch with 0 axis shift in the post and the nc output matched this expectation. The blue pt with attached line is where I expected the center of the tool to be at the top of the arch using the -7.200 axis shift but the nc output in this case was y +7.200 and z-7.200 from what I expected . Sorry for the long winded explaination but hoping if anyone can see if I did something wrong here?

Thanks

Jim