Episode# 70: Direct Drives vs Worm-Gear Driven

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The Motion Control Show

Direct Drives vs Worm-Gear Driven Rotary Stages

• How they are driven
• Comparing two example products to highlight typical differences between them
• Dimensions
  • Roughly the same size
  • The direct drive in this case is taller
• Loading capability
  • The worm-gear driven one can handle higher loads
• Precision
  • The direct drive is higher precision
• Speed & torque
  • The worm-gear rotary stage produces more torque
  • The direct drive rotary stage has a higher velocity rating
• Inertia matching
  • The worm-gear stage has more mechanical advantage
    • Can handle a much higher inertial load
• Summary
  • Worm-Gear driven
    • More industrial
    • Larger payloads
    • Lower velocities
    • Lower precision
    • Less costly
  • Direct Drive
    • Better performance
    • Higher velocities
    • Higher precision
    • Not much more $

If you have any questions or are just looking for some help, we're happy to discuss your application with you.  Reach out to us at (855) 737-4716 or fill out the online form.