LOSSARY
BDS4
G-2
HP: Horsepower
One horsepower is equal to 746 watts. Since
Power = Torque × Speed, horsepower is a measure of
a motor's torque and speed capability (e.g. a 1 HP
motor will produce 35 lb-in. at 1800 rpm).
I/O: Input/Output
The reception and transmission of information
between control devices. In modern control systems,
I/O has two distinct forms: switches, relays, etc.,
which are in either an on or off state, or analog
signals that are continuous in nature such as speed,
temperature, flow, etc.
Inertia
The property of an object to resist changes in velocity
unless acted upon by an outside force. Higher inertia
objects require larger torques to accelerate and
decelerate. Inertia is dependent upon the mass and
shape of the object.
Inertial Match
An inertial match between motor and load is obtained
by selecting the coupling ratio such that the load
moment of inertia referred to the motor shaft is equal
to the motor moment of inertia.
Inrush Current
The current surge generated when a piece of
equipment such as a servo amplifier is connected to
an AC line. This surge is typically due to the impulse
charging of a large capacitor located in the
equipment.
Instability
Undesirable motion of an actuator that is different
from the command motion. Instability can take the
form of irregular speed or hunting of the final rest
position.
Limits
Motion control systems may have sensors called
limits that alert the control electronics that the
physical end of travel is being approached and that
motion should stop.
Logic Ground
An electrical potential to which all control signals in a
particular system are referenced.
Loop, Feedback Control
A control method that compares the input from a
measurement device, such as an encoder or
tachometer, to a desired parameter, such as a position
or velocity and causes action to correct any detected
error. Several types of loops can be used in
combination (i.e. velocity and position together) for
high performance requirements.
Master Slave Motion Control
A type of coordinated motion control where the
master axis position is used to generate one or more
slave axis position commands.
Motor, AC
A device that converts electrical alternating current
into mechanical energy. Requires no commutation
devices such as brushes. Normally operated off
commercial AC power. Can be single or multiple
phase.
Oscillation
An effect that varies periodically between two values.
PLC
Programmable Logic Controller. Also known as a
programmable controller, these devices are used for
machine control and sequencing.
Power
The rate at which work is done. In motion control,
Power = Torque × Speed.
Pulse Rate
The frequency of the step pulses applied to a step-per
motor driver. The pulse rate divided by the
resolution of the motor/drive combination ( in steps
per revolution) yields the rotational speed in
revolutions per second.
Ramping
The acceleration and deceleration of a motor. May
also refer to the change in frequency of the applied
step pulse train.
Rated Torque
The torque producing capacity of a motor at a given
speed. This is the maximum continuous torque the
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
To Next Page
Loading...
