NSK Megatorque PS Series - Position Scale; Resolution of Position Scale

— 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