
B-65270EN/05 3. αiS/αiF/βiS SERIES PARAMETER ADJUSTMENT
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[Parameter window main screen] [Acc./dec. + normal control]
(7) Adjustment of the position gain
Observe the torque command waveform at the time of acc./dec. during
rapid traverse and cutting feed at the maximum cutting feedrate. When
a low frequency vibration (hunting) of about 10 to 30 Hz occurs in the
torque command waveform, the corresponding position gain is
regarded as the oscillation limit. The position gain to be set is about
80% of the position gain of the oscillation limit.
The standard setting is within 5000 to 10000.
(Check points)
• No vibration is allowed in the stopped state. Also check the
positional deviation on the CNC. (<1>)
• Neither vibration nor sound must be generated during
acceleration and deceleration. If the TCMD level has reached the
maximum value, increase T1. (<2>, <5>)
• Neither vibration nor excessive overshoot must be generated at
the end of acceleration and deceleration. If the TCMD level has
reached the maximum value, increase T2. (<3>, <7>)
• There must be no large variation in feedrate during movement at
a constant feedrate. (<4>)
NOTE
For axes for which interpolation is performed, set
the same position gain.
<2>
TCMD
Feedrate
<2>
<3>
<3>
<4> <5>
<7>
<1>
<4>
<5>