Kollmorgen BDS5, Installation And Setup Manual

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BDS5 G
LOSSARY
Glossary-i
G
LOSSARY
Absolute Position
Position referenced to a fixed zero position.
Absolute Positioning
Refers to a motion control system employing position
feedback devices (absolute encoders) to maintain a
given mechanical location.
Absolute Programming
A positioning coordinate reference wherein all
positions are specified relative to some reference, or
"home" position. This is different from incremental
programming, where distances are specified relative
to the current position.
AC Adjustable-Speed Drive
All equipment required to adjust the speed or torque
of AC electric motor(s) by controlling both frequency
and voltage applied to the motor(s).
AC Servo Drive
A servo drive used to control either or both
synchronous or induction AC motors.
Acceleration
The change in velocity as a function of time.
Acceleration usually refers to increasing velocity and
deceleration describes decreasing velocity.
Accuracy
A measure of the difference between expected
position and actual position of a motor or mechanical
system. Motor accuracy is usually specified as an
angle representing the maximum deviation from
expected position.
Actuator
A device which creates mechanical motion by
converting various forms of energy to mechanical
energy.
Adaptive Control
A technique to allow the control to automatically
compensate for changes in system parameters such as
load variations.
Ambient Temperature
The temperature of the cooling medium, usually air,
immediately surrounding the motor or another device.
Amplifier
Electronics which convert low level command signals
to high power voltages and currents to operate a
servomotor.
ASCII
(American Standard Code for Information
Interchange) This code assigns a number to each
numeral letter of the alphabet. In this manner,
information can be transmitted between machines as a
series of binary numbers.
Back EMF
The voltage generated when a permanent magnet
motor is rotated. This voltage is proportional to
motor speed and is present regardless of whether the
motor winding(s) are energized or un-energized.
Bandwidth
The frequency range in which the magnitude of the
system gain expressed in dB is greater than -3 dB.
Baud Rate
The number of binary bits transmitted per second on
a serial communications link (such as RS-232).