Overshooting Compensation - Mitsubishi Electric MDS-D-SPJ3 Specification Manual

3-3-4 Overshooting compensation

The phenomenon when the machine position goes past or exceeds the command during feed stopping is
called overshooting.
In OVS compensation, the overshooting is suppressed by subtracting the torque command set in the
parameters when the motor stops.
Speed
FB
0
Position
droop
0
[1] Overshooting during rapid traverse settling
3-3-5 Machine end compensation control
The shape of the machine end during high-speed and high-speed acceleration operation is compensated by
compensating the spring effect from the machine end to the motor end.
The shape may be fine during low-speed operation. However, at high speeds, the section from the machine
end to the outer sides could swell. This function compensates that phenomenon.
Electric end FB
Spindle head
Machine end FB
During high-speed
feed, the machine end
swells outward due to
the spring effect.
Overshoot
Time
Program path
Machine end FB
Since a command is
issued in the inner side
by the amount of spring
effect, the shape keeps
Electric end FB
fine even during the
high-speed feed.
Normal control
MDS-D-SVJ3/SPJ3 Series Specifications Manual
Position
command
0
Position
droop
0
Overshoot
[2] Overshooting during pulse feed
Machine end FB
Electric end FB
Machine end compensation
3-3 Compensation controls
Time
Compensation
Command is issued
in the inner side
during high-speed
feed.
3 - 13