NSK EDD Megatorque Motor - Resolution of Position Feedback Signal

7. Operational Function
— 7-22 —
7.2.8.1. Resolution of Position Feedback Signal
Table 7-28: Resolution of position feedback signal
Category
øA and øB (count/revolution)
øZ (count/revolution)
Shipping set
 81 920 (after quadrupled)
 (20 480 each for øA and øB)
80
Range
 1 to 5 242 880 (after quadrupled)
(1 to 1 310 720 each for øA and øB)
80
Restrictions
 The frequency of quadrupled position feedback signal is
3 125 000 [count/revolution]
(The maximum output frequency of øA and øB is 781 kHz.)
 For example, the maximum rotational speed of the Motor for the resolution of
5 242 880 [count/revolution] must be less or equal to the following.
• Maximum rotational speed: = 781 000/1 310 720 = 0.6 [s
-1
]]
 (There is another restriction on the specified maximum speed of each Motor type.)
–
* Actually, in addition to above restrictions, there is maximum
speed of each Motor type.
 Specify the total number of edge count of øA and øB pulse for one Motor revolution by the parameter FR
(Feedback signal resolution). The signal phase relation between øA and øB can be specified by the
parameter FD (Feedback signal leading phase)
The Driver Unit will process internal residual pulses caused by the setting of free circular resolution.
(The basic position for the computation of free resolution setting is the home position.)
 For an example, let’s set the Motor resolution to 360 000 edge count for one revolution. (Phase
A and B outputs 90 000 [count/revolution] respectively.)
:/NSK ON
NSK ON
:FR360000
VL8.681;_
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F
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