NSK MEGATORQUE M-ESB-YSB2020AB300 - Resolution of Position Scale

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7.2. For More Advanced Operation
7.2.1. Absolute Position Scale (For Absolute Position Sensor)
[Example] Set the CCW rotation to the plus count direction of the scale.
(1) Input the password. The acknowledgement will appear on the screen.
:/NSK ON
NSK ON
:_
KN S/
SP
N
ENT
O
(2) Input the DI command to set the direction.
:/NSK ON
NSK ON
:DI1
:_
ENT
I 1
#
D
7.2.1.2. Resolution of Position Scale
l There are fifty teeth inside the Motor to define the position, and each tooth is divided into 16 384
with digital signal processing. Therefore the resolution for one revolution of the Motor shall be
obtained as follow.
16 384 × 50 = 819 200 [pulse/revolution]
l Unit of positioning distance in positioning operation (caused by AR, AD, IR and ID commands),
and position of software over travel limit will be set in the unit of position scale resolution.
Table 7-15
Resolution of position scale
Unit of count [pulse/rev] Unit of degree [0.01°/rev]
819 200 36 000
* However setting value of the software over travel limit cannot be in unit of degree.
Figure 7-37: Absolute position scale
409 600 pulses
614 400 pulses
90° 180°
270° 0°
CW
204 800 pulses
0 pulse
(Positoin at completion of Home Return,
or position at execution of AZ command)
YSB Sereis Motor