This little snippet will assist in calculating critical numbers for building a star tracker (aka "barn door" or "hinge" tracker).
Instructions: Fill in any 3 of the 4 values below and click "Calculate". The fourth value will be displayed.
To recalculate, clear the value you want computed and change the other three.
Motor speed (RPM - Revolutions per minute)
Drive rod thread pitch (Threads/inch or Threads/mm)
Gear ratio (motor gear teeth / drive gear teeth)
Distance from hinge pin center to drive rod center (inches or mm)
