
3. αiS/αiF/βiS SERIES PARAMETER ADJUSTMENT B-65270EN/05
- 92 -
<2> Set a highest possible velocity loop gain according to Subsec.
3.3.1, "Gain Adjustment Procedure."
TCMD
ERR
TCMD fluctuation
is eliminated.
Fig. 3.3.2(c) After velocity loop gain adjustment
<3> Set a switch speed of 1500 (15 min
-1
) with the position gain
switch function (see Subsec. 4.8.1).
TCMD
ERR
240 ms
TCMD
ERR
270 ms
Fig. 3.3.2(d) Position gain switch function
<4> Set a highest possible position gain. While viewing the ERR
waveform (VCMD waveform), make an adjustment so that the
overshoot value lies within a requested precision. After setting a
position gain, perform rapid traverse for a long distance to check
that low-frequency vibration due to an excessively increased
position gain does not occur. If the set position gain is too high,
vibration after an overshoot exceeds a requested precision. An
overshoot itself can be suppressed to some extent by adjustment
of <5>.
TCMD
ERR
20
µ
m
200 ms
When a precision of 10 µm is
requested, adjust the overshoot value
to within 10 µm.
If the position gain is too high,
the requested precision 10 µm is
exceeded.
large vibration occurs in a
return movement. Suppress the
vibration to within 50% of the
requested precision.
Fig. 3.3.2(e) Adequate position gain Fig. 3.3.2(f) Excessively high position gain