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9.2.5. Dead Band Setting : DBP
l
The DBP parameter sets a dead band, centered at “0” to error in the position loop. When the
position error value is below the specified dead band value, the position command is set to 0.
l
In some systems, micro vibrations may be caused by a slight error in positioning. In this case,
micro vibrations can be prevented by setting a dead band.
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Setting a dead band reduces micro vibrations but lowers repeatability by the set value.
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The dead band is set in the units of pulse (equivalent to the resolver resolution with 12-bit
specification : refer to “4.2.2.2. Function Specifications, resolver resolution.”) When the resolver
resolution setting is 10-bit, set the dead band value by a multiple of 4.
Figure 9-20: Dead Band Setting Block Diagram
Velocity data
+
–
Position
command
Position loop
dead band
Position data
Velocity loop
integrator
Velocity
loop gain
Position
loop gain
+
–
VI
VG
PG
DBP
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