Abstract: A controller includes a press detection circuit that suppresses an output of a first press detection signal while receiving a first drive period signal indicating a drive period of an actuator, and includes a drive signal generation circuit that generates a first drive signal to drive the actuator based on a drive startup signal that is externally received in response to the first press detection signal being externally output, generates a second drive signal to drive the actuator based on the first detection signal that is output from a sensor in response to vibration of an operation device caused by the first drive signal, and outputs the first drive period signal during a period in which the actuator is driven by the first drive signal and the second drive signal.

Abstract: A controller includes a press detection circuit that suppresses an output of a first press detection signal while receiving a first drive period signal indicating a drive period of an actuator, and includes a drive signal generation circuit that generates a first drive signal to drive the actuator based on a drive startup signal that is externally received in response to the first press detection signal being externally output, generates a second drive signal to drive the actuator based on the first detection signal that is output from a sensor in response to vibration of an operation device caused by the first drive signal, and outputs the first drive period signal during a period in which the actuator is driven by the first drive signal and the second drive signal.

Abstract: An austenitic cast iron including basic elements of C, Si, Cr, Ni, Mn and Cu; and the balance including Fe, inevitable impurities and/or a trace-amount modifier element, which is effective in improving a characteristic of the cast iron, in a trace amount; and structured by a base comprising an Fe alloy in which an austenite phase makes a major phase in ordinary-temperature region; wherein the basic elements fall within compositional ranges that satisfy the following conditions when the entirety of the cast iron is taken as 100% by mass: C: from 2.0 to 3.0%; Si: from 4.0 to 5.4%; Cr: from 0.8 to 2.0%; Mn: from 3.9 to 5.6%; Ni: from 17 to 22%; and Cu: from 0.9 to 1.6%.

Abstract: An austenitic cast iron according to the present invention is characterized in that: it comprises: basic elements comprising C, Si, Cr, Ni, Mn and Cu; and the balance comprising Fe, inevitable impurities and/or a trace-amount modifier element, which is effective in improving characteristic, in a trace amount; and it is an austenitic cast iron being a cast iron that is structured by a base comprising an Fe alloy in which an austenite phase makes a major phase in ordinary-temperature region; wherein said basic elements fall within compositional ranges that satisfy the following conditions when the entirety of said cast iron is taken as 100% by mass (hereinafter being simply expressed as “%”): C: from 2.0 to 3.0%; Si: from 4.0 to 5.4%; Cr: from 0.8 to 2.0%; Mn: from 3.9 to 5.6%; Ni: from 17 to 22%; and Cu: from 0.9 to 1.6%.

Abstract: An austenitic cast iron according to the present invention has Ni: from 7 to 15% by mass, and is characterized in that it comprises a base structure in which an austenite phase makes a major phase even in ordinary-temperature region by adjusting the respective compositions of Cr, Ni and Cu, excepting C and Si, so as to fall within predetermined ranges. In accordance with the present invention, it is possible to obtain an austenitic cast iron, which is excellent in terms of oxidation resistance and the like, inexpensively, while reducing the content of expensive Ni.