A machined or cored fluid conducting path which lies within
or passes through a component.
Refers to a data communication format wherein many signal lines
are used to communicate more than one piece of data at the same
torque: The maximum torque a brushless motor can deliver for
short periods of time Operating PacTorq motors above value can cause
demagnetization of the rare eart magnets. This is an irreversible
effect that will alter the motor characteristics and degrade performance.
This is also known as peak current. Not to be confused with system
peak torque, which is often determined by amplifier peak current
limitations, where peak current is typically two times continuous
Angle: The angle at which the steady state input signal to a
system leads the output signal.
Margin: The difference between 1800 and the phase
angle of a system at its crossover frequency.
Valve: An auxiliary valve used to control the operation of another
valve. The controlling stage of a two stage rod.
A cylindrically shaped part which fits within a cylinder and
transmits or receives motion by means of a connecting rod.
Programmable logic controller, a machine controller that activates
relays and other I/O units from a stored program. Additional modules
support motion control and other functions.
Programmable motion controller, primarily designed for signal or
multi axis motion control with I/O as an auxiliary function.
A valve that moves perpendicular to or from its seat.
Refers to the number of magnetic poles arranged on the rotor
of the brushless motor. unlike an AC motor, the number of poles
has no direct relationship to the base speed of the motor.
An internal or external terminus of a passage in a component.
Work per unit of time, measured in horsepower (hp) or watts.
Factor: Ratio of torque power (KW) to apparent power (kVA)
Pack: An integral power supply unit usually containing a pump,
reservoir, relief valve and directional control.
Pressure: The pressure of compressed gas in an accumulator prior
to the admission of liquid.
per unit area, usually expressed in pounds per square inch (psi).
Line: The line carrying the fluid from the pump outlet to the
pressurized port of the actuator.
Override: The difference between the cracking pressure of a
valve and the pressure reached when the valve is passing full flow.
Reducing Valve: A valve which limits the maximum pressure at
its outlet regardless of the inlet pressure.
Switch: An electric switch operated by fluid pressure.
valve which controls and varies pressure, flow direction, acceleration
and deceleration from a remote position. They are adjusted electrically
and are actuated by proportional solenoid rather than by a force
or torque motor. The output flow is proportional to the input signal.
They provide moderately accurate control of hydraulic fluid.
A frequency at which the transfer function of a system goes
Rate: The frequency of the step pulses applied to a motor driver.
The pulse rate multiplied by the resolution of the motor/drive combination
(in steps per revolution) yields the rotational speed in revolutions
Width Modulation: A PWM controller (amplifier) switches DC supply
voltage on and off at fixed frequencies. The length of the on/off
interval or voltage waveform is variable. Pulse width modulation
(PWM), describes a switch mode (as opposed to linear) control technique
used in amplifiers and drivers to control motor voltage and current.
Pulse Width Modulation. A method of controlling the average
current in a motors phase windings by varying the on-time (duty
cycle) of transistor switches.