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— 6-2 —

6.2. Position Scale

6.2.1. Resolution of position Scale

 A Motor has eighty teeth on its circumference, and the position sensor divides 1-tooth into

32 768 by digital signal processing. Therefore, the pulse count for one revolution of the Motor

shall be obtained as below.

32 768 × 80 = 2 621 440 [count/revolution]

 The parameters and the commands of the Megatorque Motor System depend on the unit (count)

of the resolution.

◊ However, the software over travel limit cannot be set in units of degree.

Table 6-2: Resolution of position scale

Resolution of position scale

Unit of count [count/revolution] Unit of degree [0.01°/revolution]

2 621 440 36 000

Fig 6-2: Position scale system

1 310 720 counts

1 966 080 counts

90° 180°

270° 0°

Direction of plus

655 360 counts

0 pulse

(Positoin at completion of Home Return, or

position at execution of AZ command)

PS sereis Motor

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NSK Megatorque PS Series Specifications

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