NSK EDD Megatorque Motor, Руководство пользователя, Страница: 165 / 398

7. Operational Function
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7.2.6.4. In-position Limit: Parameter IN

This parameter states positioning accuracy.

The output IPOS closes when the absolute values in the error counter is less or equal to the setting value of
the parameter IN.

The unit is the resolution of the position sensor (pulse).
Table 7-24: Resolution of position sensor
Motor type Resolution (count/revolution)
PS 2 621 440

For example, the following formula shows how to convert the repeatability of ± 100 seconds,
which is to be specified for a Motor, to the unit of pulse.
IN setting =
Resolution
×
Repeatability
[degree] 360
=
2 621 440
×
100
= 202 [pulse]
360 3600
7.2.6.5. Parameter IS: In-position Stability Timer

This is to check the stability of positioning operation.

In case of the IPOS mode, the output IPOS signal might become unstable at settling stage of a positioning
if the parameter IN is set to low value (approximately IN100 or lower) even the servo gain is well tuned.

Setting the parameter IS is to prevent the problem.

In case of both CFIN mode and FIN mode, the setting of parameter IS prevents outputting IPOS signal
before the Motor settles in the position.