Rotary actuator and method of controlling an actuator

A wiper apparatus comprising:

• a wiper blade to be placed on a wipe surface, said wiper blade having a drive body that vibrates at least one part;
• a shaft member on which the wiper blade is mounted;
• a bearing section supporting the shaft member and allowing the shaft member to rotate;
• and
• a resistance member for applying a rotation-suppressing force to the shaft member to suppress rotation of the shaft member.

An indicator comprising:

• a pointer composed of a drive body having at least one part which vibrates;
• a shaft member on which the pointer is mounted;
• a bearing section supporting the shaft member and allowing the shaft member to rotate;
• and
• a resistance member for applying a rotation-suppressing force to the shaft member to suppress rotation of the shaft member.

A motor comprising:

• a drive body having at least one part which vibrates;
• a shaft member on which the drive body is mounted;
• a bearing section supporting the shaft member and allowing the shaft member to rotate;
• and
• a resistance member for applying a rotation-suppressing force to the shaft member to suppress rotation of the shaft member.