ElmoMC SimplIQ Servo Drives Composer User Manual - Manual (Page 94)

Continuous stall current The maximum continuous current, in amperes, allowed
for the motor. This value is defined by the motor
manufacturer.
Counts The position unit of measurement of the drive. Four
times the number of electronic pulses sent by an
encoder in one revolution.
Deceleration The rate at which speed decreases, in counts/sec 2 .
Displacement The change in position of the system – measured in
encoder units – with respect to a specific reference
point.
Driver continuous current Same as continuous stall current.
Encoder magnetic pitch See Magnetic pitch .
Encoder resolution The length of the position unit in linear motors. Four
times the encoder grating pitch value, because it takes
into account two encoder slot transitions (high-to-low
and low-to-high) and two sets of slots (A and B).
Free motion The mode in which rotating motors operate without
restriction, in terms of angle and position.
Free-wheel A state in which power to the motor is turned off and
the motor continues to rotate freely, by inertia.
Gain The ratio of the output signal magnitude to the input
signal magnitude.
Gain coefficients Gain parameters used in the gain scheduling
algorithm. See also
KI and KP .
Gain scheduling The means of accommodating for known variations in
the dynamics of a system. Gain scheduling uses a
customized algorithm that calculates adaptive gain
modifications in order to improve system stability and
accuracy.
KI The integral gain parameter used to define a PID filter.
It functions to reduce sharp peaks and to obtain a
smoother step response.
KP The proportional gain parameter used to define a PID
filter. It functions as a means to obtain an optimal
closed-loop transfer function.
Low pass A filter whose transfer function transfers low
frequencies and blocks high frequencies.
Magnetic pitch The distance of one electrical cycle in a linear motor.
See also
Encoder resolution .
Elmo Composer User Manual Glossary
MAN-COMPUM (Ver. 1.9)
G-2