CONTROL METHOD FOR PIEZOELECTRIC DRIVE DEVICE, PIEZOELECTRIC DRIVE DEVICE, ROBOT, AND PRINTER
First Claim
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1. A control method for a piezoelectric drive device including:
- a piezoelectric vibrator having a vibrating portion and a distal end portion coupled to the vibrating portion, in which the distal end portion makes elliptic motion by a stretching vibration and a flexural vibration of the vibrating portion;
a driven member driven by the elliptic motion of the distal end portion; and
a drive signal generation circuit outputting a stretching vibration drive signal that generates the stretching vibration and a flexural vibration drive signal that generates the flexural vibration in the piezoelectric vibrator,the method comprising, when the driven member is stopped, superimposing and outputting a modulation signal for amplitude modification on the stretching vibration drive signal by the drive signal generation circuit.
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Abstract
A control method for a piezoelectric drive device includes a piezoelectric vibrator having a vibrating portion and a distal end portion coupled to the vibrating portion, in which the distal end portion makes elliptic motion by a stretching vibration and a flexural vibration of the vibrating portion, a driven member driven by the elliptic motion of the distal end portion, and a drive signal generation circuit outputting a stretching vibration drive signal that generates the stretching vibration and a flexural vibration drive signal that generates the flexural vibration in the piezoelectric vibrator, and the method includes, when the driven member is stopped, superimposing and outputting a modulation signal for amplitude modification on the stretching vibration drive signal by the drive signal generation circuit.
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10 Claims
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1. A control method for a piezoelectric drive device including:
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a piezoelectric vibrator having a vibrating portion and a distal end portion coupled to the vibrating portion, in which the distal end portion makes elliptic motion by a stretching vibration and a flexural vibration of the vibrating portion; a driven member driven by the elliptic motion of the distal end portion; and a drive signal generation circuit outputting a stretching vibration drive signal that generates the stretching vibration and a flexural vibration drive signal that generates the flexural vibration in the piezoelectric vibrator, the method comprising, when the driven member is stopped, superimposing and outputting a modulation signal for amplitude modification on the stretching vibration drive signal by the drive signal generation circuit. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A piezoelectric drive device comprising:
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a piezoelectric vibrator having a vibrating portion and a distal end portion coupled to the vibrating portion, in which the distal end portion makes elliptic motion by a stretching vibration and a flexural vibration of the vibrating portion; and a driven member driven by the elliptic motion of the distal end portion, wherein when the driven member is stopped, the piezoelectric vibrator performs the stretching vibration containing a first amplitude and a second amplitude different from the first amplitude.
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8. A piezoelectric drive device comprising:
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a piezoelectric vibrator having a vibrating portion and a distal end portion coupled to the vibrating portion, in which the distal end portion makes elliptic motion by a stretching vibration and a flexural vibration of the vibrating portion; a driven member driven by the elliptic motion of the distal end portion; and a drive signal generation circuit outputting a stretching vibration drive signal that generates the stretching vibration and a flexural vibration drive signal that generates the flexural vibration in the piezoelectric vibrator, wherein when the driven member is stopped, the drive signal generation circuit superimposes and outputs a modulation signal for amplitude modification on the stretching vibration drive signal.
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9. A robot comprising a piezoelectric drive device,
the piezoelectric drive device including: -
a piezoelectric vibrator having a vibrating portion and a distal end portion coupled to the vibrating portion, in which the distal end portion makes elliptic motion by a stretching vibration and a flexural vibration of the vibrating portion; and a driven member driven by the elliptic motion of the distal end portion, wherein when the driven member is stopped, the piezoelectric vibrator performs the stretching vibration containing a first amplitude and a second amplitude different from the first amplitude.
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10. A printer comprising a piezoelectric drive device,
the piezoelectric drive device including: -
a piezoelectric vibrator having a vibrating a portion and a distal end portion coupled to the vibrating portion, in which the distal end portion makes elliptic motion by a stretching vibration and a flexural vibration of the vibrating portion; and a driven member driven by the elliptic motion of the distal end portion, wherein when the driven member is stopped, the piezoelectric vibrator performs the stretching vibration containing a first amplitude and a second amplitude different from the first amplitude.
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Specification
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Current AssigneeSeiko Epson Corporation (Seiko Group)
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Original AssigneeSeiko Epson Corporation (Seiko Group)
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InventorsSATO, Ryuichi
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current
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CPC Class CodesB41J 2/04581 controlling heads based on ...H02N 2/004 Rectangular vibratorsH02N 2/0075 Electrical details, e.g. dr...H02N 2/103 by pressing one or more vib...H02N 2/14 Drive circuits; Control arr...H02N 2/142 Small signal circuits; Mean...H10N 30/20 with electrical input and m...H10N 30/802 Drive or control circuitry ...
