Abstract: A rotary table device that includes an air seal mechanism that prevents entry of foreign material into a frame by supplying compressed air to an air channel having a gap which is formed in a frame and which is defined by an outer peripheral surface of a rotating shaft and an inner peripheral surface of an accommodation hole in the frame at a side closer to a table than a bearing is, and by ejecting the compressed air from an inside of the frame. The air channel includes a storing portion that is disposed upstream from an ejection portion, the ejection portion being a most downstream side portion of the air channel, and a channel width of the storing portion is larger than a channel width of a portion of the air channel that is disposed downstream from the storing portion.

Abstract: A method of controlling drive of a driving motor for a rotary indexing device is provided. The device includes an indexing mechanism that indexes an angular position of a circular table by rotating the circular table with the use of the driving motor as a driving source, a clamping mechanism that holds the indexed angular position, and a control unit that controls drive of the driving motor by position control. In the method, the control unit controls the drive of the driving motor during operation of the clamping mechanism with a content of control in which an output torque of the driving motor by the position control becomes smaller than an output torque by the position control during indexing of the angular position of the circular table for an equivalent positional deviation.

Abstract: A method of controlling drive of a driving motor for a rotary indexing device is provided. The device includes an indexing mechanism that indexes an angular position of a circular table by rotating the circular table with the use of the driving motor as a driving source, a clamping mechanism that holds the indexed angular position, and a control unit that controls drive of the driving motor by position control. In the method, the control unit controls the drive of the driving motor during operation of the clamping mechanism with a content of control in which an output torque of the driving motor by the position control becomes smaller than an output torque by the position control during indexing of the angular position of the circular table for an equivalent positional deviation.

Abstract: A tiltable-rotatable circular-table device for a machine tool includes a rotary-driving motor which is fixed to a tiltable table and is for rotating a circular table disposed above the tiltable table; a motor cover which is fixed to the main frame and is for housing the rotary-driving motor; and cables connected with the rotary-driving motor. The tiltable-rotatable circular-table device further includes a cable guide whose one end is fixed to the motor cover and the other end is fixed on a periphery of the rotary-driving motor. The cable guide is housed in the motor cover and is capable of surrounding at least a portion of the periphery of the rotary-driving motor so as to guide the cables in a direction in which the cables extend. The cable guide is bendable mainly in its thickness direction at multiple sections thereof such that the cable guide is capable of surrounding the rotary-driving motor.

Abstract: A tiltable-rotatable circular-table device for a machine tool includes a rotary-driving motor which is fixed to a tiltable table and is for rotating a circular table disposed above the tiltable table; a motor cover which is fixed to the main frame and is for housing the rotary-driving motor; and cables connected with the rotary-driving motor. The tiltable-rotatable circular-table device further includes a cable guide whose one end is fixed to the motor cover and the other end is fixed on a periphery of the rotary-driving motor. The cable guide is housed in the motor cover and is capable of surrounding at least a portion of the periphery of the rotary-driving motor so as to guide the cables in a direction in which the cables extend. The cable guide is bendable mainly in its thickness direction at multiple sections thereof such that the cable guide is capable of surrounding the rotary-driving motor.