CoreXA #
A simple implementation for combining a linear and rotary axis in a compact setup. Setup provides a gear-reduced infinite rotation axis and coupling the efforts of two motors to provide greater force for motion.
Specifications #
- Infinite rotation possible because of two closed loop belts at two heights.
- A gear reduction for the rotational axis of ~1:5 based on the motor and drive gear pulley. Giving a theoretical resolution of 0.046 degrees under a 1/8th microstep.
- Free space in the middle of the rotational axes providing longer work holding options like 5c collet style clamps.
- Larger travel distance with Off-board motors and combined efforts for linear as well as rotary motion
Basic layout #
CAD Implementation #
A simple 3D printed Axis that demonstrates the functionalities of the layout.
A 3D printed gantry and frame with a 95 Teeth 3D GT2 pulley as the base for the rotary axis.
The lack of motor in the middle allows space for large bearings that can take big moment loads. A 5C style collet can also be implemented allowing for longer workpieces and holding cylindrical pieces.
5-Axis Configuration #
A possible 5 axis config with the addition of a Z axis would make it possible as a printer or a CNC mill.
Prototype #
The single stage prototype is printed with PLA on a Bamboo Printer.
Infinite Rotation
Rahul S Rajan 2024