I am updating my Railroad Turntable page to reflect my change in the design of the motor drive. The changes include:

• 5 volt NEMA 8 miniature stepper motor instead of much larger 12 volt NEMA 17 motor
• 18-tooth pulley gear for 4 mm motor shaft instead of 20-tooth gear for 5 mm shaft
• Recalculation of size of large 3D-printed turntable-side pulley gear

The Turntable Calculations page is also being updated to reflect these changes.