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Positioning Control The World of Positioning Control 1
1-3
Stepping motor
• Positioning mechanism is simple.
• If load is heavy, motor may step out and
displacement can occur.
• Motor capacity is small.
• Precision is poor at high speed.
DC servo system
• Positioning precision is good.
• Maintenance is required for motor
brushes.
• It is not suitable for rotation at high
speed.
General purpose inverter and general
purpose motor
• Multi-speed positioning is available
using high-speed counter.
• High precision positioning is not
available.
• Large torque is not available at start.
(Specialized inverter is required)
AC servo system
• Precision is good.
• Maintenance is not required.
• Positioning address can be easily
changed.
• It is compact, and offers high power.