JP2008125146A5 - - Google Patents

Claims (8)

A vibration wave motor;
Driving frequency signal applying means for applying a driving frequency signal to the vibration wave motor;
Control means for controlling the drive frequency signal applying means,
When the stop time of the vibration wave motor has reached the first specified time, the control means moves the moving object moved by the vibration wave motor to an end of a movable range, and moves the moving object to the end. A drive device that controls the drive frequency signal applying means so as to apply a drive frequency signal to the vibration wave motor in a state of being in contact with a portion.   When the application time of the drive frequency signal in a state where the moving object is abutted against the end portion reaches a second specified time, the control means is configured to return the moving object to the original position. 2. The driving apparatus according to claim 1, wherein the signal applying means is controlled. Having detecting means for detecting at least one of temperature and humidity;
The control means changes at least one numerical value of the first specified time, the second specified time, and the drive frequency signal according to at least one of the temperature and humidity information. 2. The drive device according to 2.   When the rotation command of the vibration wave motor is issued while the driving frequency signal is being applied in a state where the moving object is abutted against the end portion, the control means moves the moving object to the end portion. 4. The drive device according to claim 2, wherein the application of the drive frequency signal in the abutted state is interrupted and the rotation command is followed.   Even when the rotation command is issued while the drive frequency signal is being applied in a state where the moving object is in contact with the end portion, the control means may apply the drive frequency signal for a period of time. If the second specified time has not been reached, the drive frequency signal is applied with the moving object being abutted against the end until the application time reaches the second specified time; The drive device according to claim 4, wherein the rotation command is obeyed. Even when the rotation command is issued while the drive frequency signal is being applied in a state where the moving object is in contact with the end portion, the control means may apply the drive frequency signal for a period of time. If the third specified time shorter than the second specified time has not been reached, the drive is performed in a state where the moving object is in contact with the end until the application time reaches the third specified time. The drive device according to claim 4, wherein the rotation command is applied after a frequency signal is applied. In a control method of a drive device comprising a vibration wave motor and drive frequency signal applying means for applying a drive frequency signal to the vibration wave motor,
When the stop time of the vibration wave motor has reached the first specified time, the moving object moved by the vibration wave motor is moved to the end of the movable range, and the moving object is abutted against the end. And controlling the drive frequency signal applying means to apply the drive frequency signal to the vibration wave motor in a state.   The program in which the program code for making a computer perform the control method of the drive device described in Claim 7 was described.