NSK MEGATORQUE M-ESB-YSB2020AB300 - Dead Band: DBP

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7.2. For More Advanced Operation
7.2.6. Dead Band: DBP
7.2.6. Dead Band: DBP
Parameter: DBP (The password is necessary.)
l 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.
l This eliminates problems of small vibration after completion of positioning.
Table 7-23
Parameter Function Shipping set
DBP
Sets dead band to the position loop. DBP0
l The DBP parameter specifies a dead band on the position loop deviation in both sides of 0 (zero)
and zeroes the deviation when it is under the DBP setting.
l In some use conditions, slight vibration may be caused due to minute deviation. Provision of a
dead band eliminates such slight vibration.
l If a dead band is specified, repeatability of positioning accuracy will be deteriorated by the
amount of the dead band, though small vibration may be eliminated.
l Unit of a dead band is the pulse. (Corresponds to the resolution of position sensor. Refer to
“2.7.2. Functional Specifications” for the resolution of position sensor.)
Figure 7-46
Velocity data
+
–
Position
command
Position loop
dead band
Position data
Velocity loop
integrator
Velocit
y
loop gain
Position
loop gain
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–
VIVGPG
DBP