ElmoMC SimplIQ Servo Drives Composer User Manual - Manual (Page 95)

Maximum mechanical speed The maximum motor speed defined by the
manufacturer, specified in m/sec for linear motors and
RPM for rotating motors.
Notch filter A filter that blocks a defined band of frequencies and
transfers all frequencies above and below that band.
For example, a filter has a transfer function of the form:
2
2
2
2
1
2
2
2
ω ω ξ
ω ω ξ
+ ⋅ ⋅ ⋅ +
+ ⋅ ⋅ ⋅ +
s s
s s
where 5 . 0
1
< ξ
and 5 . 0
2
≈ ξ
. Its Bode plot, depicted
in Figure G-1, has a hole at frequency
ω
. The filter is
therefore said to be a notch filter at frequency
ω
. The
purpose of a notch filter is to block energy transfer to
the motor around the notch frequency. This is one
means of preventing a motor and load from
accumulating energy at their resonance frequency,
thereby avoiding shaking of the load.
Figure G-1: Bode Plot of a Notch Filter, d1=0.01,
d2=0.5 Located at 100Hz
Phase The angular relationship between voltage and current
waveforms.
PTP Point-to-point motion, according to which the motor
moves from its present position to a final point. The
motor reaches the final point at zero speed and then
remains at that point. The trajectory to the final point is
calculated based on the speed, acceleration and
deceleration limits.
PVT table Position-, velocity- and time-tabulated motioned
defined in a table array.
Elmo Composer User Manual Glossary
MAN-COMPUM (Ver. 1.9)
G-3