Alphabet Index 【A】

●A-phase (Signal) Output, B-phase (Signal) Output

Whether the axis rotation is clockwise or counterclockwise is judged with difference of A and B phases by outputting incremental encoder as shown below. The A-phase precedes the B-phase in case of a clockwise rotation (CW).

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●Absolute Encoder

An encoder with a function to detect the absolute position so that it does not have to return to origin whenever it is powered on.

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●Absolute Position

A position against the reference point (origin). The antonym is “incremental position.”

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●Absolute Positioning Repeatability

Difference between the coordinate value and the actual value when positioning at any point indicated by the coordinate value.

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●AC Servo Motor

A servo motor rotated by an alternating current in the fixed winding. It does not have a brush and a commutator which are weaknesses of DC servo motors.

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●Address

An absolute position given in an absolute coordinate system.

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●Addressing

A method of transferring indications to actuators. One is absolute addressing (absolute coordinate system), the other is incremental addressing (relative coordinate system, indicating the distance of transfer).

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●Alarm Signal

An signal sent when something wrong (trouble) has happened in the device.

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●Automatic Operation

An operation activated by a start signal from an external device (PLC etc.)

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