NO. OF MOTOR POLES and ENCODER CONSTANT
(Parameter P51 to P52)
Used to set No. of motor poles and encoder constant.
These parameters are used to get the detection frequency from the encoder signal.
Parameter
No.
Function name
No. of motor poles
P51
Encoder constant
2:2 poles / 4:4 poles / 6:6 poles
50 to 999("999" is calculated as "1000".)
Data setting value
P52
䋪
Specify the value indicated on the label of the motor for the No. of motor poles.
䋪
When the encoder has been directly installed on the motor shaft, specify the encoder
resolution[ No. of pulses per one rotation of the encoder (P/R)] for the encoder constant.
If the encoder had been installed via a reduction gear, specify the reduced value of
the motor shaft.
ǂ
Encoder constant( reduced value of motor shaft) =
[ No. of pulses per one rotation of the encoder]
r
[Reduction gear ratio]
ƽ
Detection frequency
Actual rotation speed is detected by the encoder signal.
The value that is calculated from the detected rotation speed is the detection frequency.
The detection frequency is used in the case of "obstacle detection function(slip) ",
and so on.
Detection frequency[Hz]
˙
h
Speed of rotation [r/min]
No. of motor poles
120
Speed of rotation [r/min]
˙
No. of pulses of encoder per minute [p/min]
Encoder constant [p/r]
Note) No. of motor poles and encoder constant should be specified correctly.
Failure to do so could lead to malfunctions.
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