5Axis Kinetic from 2.8 on 2.7x

@JackRay
Please provide information about the breakout board and how it drives your spindle and your hal and ini

@Profed
I don't understand what you are trying to do. Please explain the situation in more detail.

No that won't work. The kinematic has to reflect the axis setup of the machine. But there is a xyzac-trt kinematic in linuxcnc.

linuxcnc.org/docs/2.8/html/motion/5-axis-kinematics.html

If you have a xyzac-trt setup but with a gantry using two motors for the same axis say xyyzac then you will need to adjust the kinematics file and rebuild linuxcnc.


[edit]
This is for changing xyzbc to xyzzbc kinematic but it's the same (fairly straight forward) procedure:

forum.linuxcnc.org/10-advanced-configura...-kins-module?start=0

Ah, I see, -trt won't work for a tilting head setup. As far as I know Bridgemill is the only kinematic where the spindle does both rotations.
So really in your case it's just that x and y axis are swapped compared to the "bridgemill" simulation?

It seems to me that the XYZBC-SRT kinematics is what is used in the bridgemill simulation you posted. So that is already there. You seem to need a XYZAC-SRT kinematic which means that your spindle pivot is parallel to the X and Z axis while the bridgemill kinematics is made for a machine where the spindle pivots are parallel to the Y and Z axis. So I wonder if you couldn't just swap the X and Y axis of your machine in the INI and use the bridgemill kinematic in LinuxCNC.
Can you elaborate a bit where you are at with your project?
What does your machine look like?
Do you have LinuxCNC installed?

[edit]
Just checked, the bridgemill config uses a different code for its kinematic that seems to predate the one in your pdf document:

github.com/LinuxCNC/linuxcnc/blob/master...nematics/5axiskins.c