[This post is for personal documentation purposes only and may not be self explanatory]

This is an alternative method for a achieving a three dimensional actuation using only two motors. I am using a solenoid for switching between two different planes of motion (say x-y and y-z).

Required –

  • 2 Bipolar Stepper Motors 12V/350mA (I prefer a minimum torque of 0.2 Nm)
  • 2 lead screws with shaft couplers.
  • 2 pairs of rails with grips and brushes.
  • 1 solenoid for interlocking and switching planes of motion.

Disadvantages –
The motion is not a continuous 3D motion and the speed is much slower as compared to an xyz-gantry using 3 motors. In this setup, it is impossible to travel from point (x1, y1, z1) to (x2, y2, z2). Instead it travels as follows –  (x1, y1, z1) -> (x2, y2, z1) -> (x2, y2, z2).

2D 3D actuation

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