I'm evaluating my controller options for a CNC Gimbal, the most promising option I can see so far is the tinyG. There are no cutting forces involved, only inertial forces. This machine would consist of 3 rotary axes A,B, and C. With the final stepper driver reserved for a potential future linear axis.
I require homing on all three of these rotary axes. I have looked through the forums and wiki documentation, and everything I can read indicates that homing is not available on axes B and C.
Is it true that homing is only supported on X/Y/Z/A axes?
Could someone please recommend a workaround or alternative controller if this is the case?
Interesting question, the Wiki reference posted by Zootalaws does reference, in logic space, homing actions for all 6 available axis assignments for a four motor tinyG, I believe it is also a correct statement that the X,Y,Z and A axis Min/Max switch ports are assigned in the base code to those specific axis functions and not reassignable. Thus there are no connections available to feed the homing logic when homing a B or C axis.
It is likely that rework of various header files and recompiling tinyG could attach the physical I/O ports to B and C axis homing logic.
How to get there is beyond my pay grade, so I have asked a developer to have a look here and comment.
Thanks for that link, it does indeed look like tinyG only supports XYZA homing unfortunately. I wonder how much would need to be changed to support any axis homing and why it isn't that way currently.
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