
3. αiS/αiF/βiS SERIES PARAMETER ADJUSTMENT B-65270EN/05
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(c) Servo HRV4 control
After setting servo HRV2 control, set the parameters listed below.
Servo HRV4 control and servo HRV3 control cannot be set at the
same time.
[HRV4 parameters]
Parameter No.
FS30i
Recommended
value
Description
2014#0 1 Enables HRV4 current control.
2300#0 1 Enables the extended HRV function.
2202#1 1
Enables the cutting/rapid velocity loop
gain switching function.
2334 150 Current gain magnification in HRV4 mode
2335 200 Velocity gain magnification in HRV4 mode
NOTE
1 Servo HRV4 can be used with Series 90D0.
2 Use of servo HRV4 decreases the maximum
number of axes per servo card and limits the
maximum torque of the servo motor to 70%. For
details, see Subsection 4.2.2, "Servo HRVV4
Control".
3 To use HRV4 control, G codes must be set. (HRV4
control is enabled between G5.4Q1 and G5.4Q0.)
(5) Adjustment of high-speed velocity control
After setting servo HRV control, adjust the velocity loop gain and the
resonance elimination filter.
To obtain high servo performance, a high velocity loop gain must be
set. Some machines, however, vibrate easily at a particular frequency,
and setting a high velocity loop gain can cause vibration at that
frequency (machine resonance). As a result, it becomes impossible to
set a high velocity loop gain.
In such a case, the resonance elimination filter must be adjusted. The
resonance elimination filter can lower the gain only in an area around
a particular frequency, therefore allowing a high velocity loop gain to
be set without the occurrence of machine resonance.
The velocity loop gain and the resonance elimination filter can be
adjusted more easily by using Tuning Navigator of SERVO GUIDE.