NSK EDD Megatorque Motor, User Manual

Page: 213 / 398

8. More Advanced Function
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8.5.3. Position Loop Dead Band

The parameter DBP is used to specify a dead band for the deviation of position loop. The deviation will be
zeroed when it is under the set data of the parameter DBP.

The dead band eliminates problems of positioning instability right after completion of positioning.
Table 8-30: Position loop dead band: DBP
Parameter Function
Initial
setting
Data range Unit

DBP Sets a dead band to the position loop. 0 0 to 4 095 0.5 [pulse]

: Require an entry of the password.

The parameter DBP specifies a dead band on the position loop deviation in both sides of 0 (zero) and
zeroes the deviation that is under the DBP setting.

In some use conditions, slight vibration may occur due minute deviation. Provision of the dead band
eliminates such slight vibration.

If a dead band is specified, the repeatability of positioning accuracy will be deteriorated by the
amount of the dead band though the slight vibration may be eliminated.

The unit of the dead band is a half of pulse count.
(Corresponds to a half of the resolution of position sensor. Refer to “2.7. Driver Unit Specifications” for
the resolution of position sensor.)