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Glossary


Term Description Units
5V Power Out Rating

The total amount of power that the device can provide to external devices including encoders, hall sensors, and devices connected to i/o.

mA
Accuracy

The maximum deviation between the actual final position and the instructed position over the full range of travel.

degrees, mrad
Accuracy

The maximum deviation between the actual final position and the instructed position over the full range of travel.

µm, "
Analog Input

Number of analog inputs available.

Analog Input Range

Input range of analog inputs.

V
Analog Input Resolution

The smallest incremental voltage measurable or resolvable on the analog input.

V
Angular Motion Per Motor Rev

In the case of a motorized rotation device, this specifies the angular motion corresponding to one complete revolution of the motor.

degrees
Aperture Diameter

In the case of a rotary stage with center aperture, this is the diameter of the aperture.

mm, "
Axes of Motion

In the case of a controller such as the T-CON or T-JOY, this is the number of axes of motion that the device is capable of controlling. In the case of a positioning device, it is the number of positioning axes.

Backlash

The change in actual final position that results from approaching the target position from the opposite direction.

µm, "
Backlash

The change in actual final position that results from approaching the target position from the opposite direction.

degrees, mrad
Buttons

The number of buttons on a device as part of the user interface.

CE Compliant

Indicates if the device is CE compliant.

Closed-Loop Modes

This describes the various closed loop modes.

Compatible Products

Indicates some of the most common products that may be used with the device.

Connector Type

Connector type.

Controller Maximum Current Per Phase

This is the maximum current that the controller can put out per phase of stepper motor.

mA
Current Rating

Rated output current of power supply.

A
Data Cable Connection

Describes the cable and connector type required to communicate with a motion control device.

Default Resolution

In the case of stepper motor controllers, or motion devices with built-in controllers, the smallest incremental motion possible as a fraction of a full step.

of a step
Display

Describes the display type on devices with LCD displays.

Encoder Resolution

Line density of the encoder.

CPR, states/rev
Encoder Type

Describes the type of encoder included.

Extension Cable Length

Length of extension cable.

m, '
Guide Type

In the case of linear stages and slides, this specifies what type of guide is used to constrain the stage to the axis of motion.

Horizontal Runout

In the case of a linear stage or slide, this represents the maximum horzontal deviation of the stage from the axis of travel as the device is moved through its full range of motion.

µm, "
Inductance

Inductance of each phase of the motor.

mH
Input Voltage

Input Voltage of power supply.

VAC
Integrated Controller

Specifies whether the device has an integrated controller or requires an external controller for operation.

Isolated Digital Input

Number of opto-isolated digital inputs available.

Isolated Digital Output

Number of opto-isolated digital outputs available.

LED Indicators

Indicates the presence of LED indicator lights. If present, one light indicates device power, while the other indicates communication activity.

Limit or Home Sensing

Describes what type of limit or home sensing capabilities are built into a motion device.

Limit Sensors per Axis

Number of limit sensor inputs available per axis.

Linear Motion Per Motor Rev

In the case of a motorized linear stage or slide, this specifies the linear motion corresponding to one complete revolution of the motor.

mm, "
Manual Control

Indicates the presence of a control knob for manually controlling the device.

Maximum Cantilever Load

In the case of a linear stage, this is the maximum torque that may be applied about the axis of motion.

N-cm, oz-in
Maximum Centered Load

In the case of a linear or rotary stage, this is the maximum allowable force that can be applied at the center of the stage, perpendicular to the stage surface. In the case of a mirror mount it is the maximum weight that can be mounted to the face plate of the mirror mount.

N, lb
Maximum Continuous Thrust

The maximum recommended continuous operating load applied in the direction of travel of a linear motion device. Note that due to lifetime concerns, this may be less than the maximum force the device is capable of exerting.

N, lb
Maximum Continuous Torque

The maximum recommended continuous operating torque of a rotary motion device. Note that due to lifetime concerns, this may be less than the maximum torque the device is capable of exerting.

N-cm, oz-in
Maximum Current Draw

The maximum current that the device will draw. A power supply must be rated for at least the maximum total current draw of the devices connected to it.

mA
Maximum Speed

The maximum speed that a motorized device can move under no load.

deg/s, rpm
Maximum Speed

The maximum speed that a motorized device can move. Note that the speed is a function of load. The maximum speed can only be obtained at low loads. Maximum speed and maximum force cannot be achieved simultaneously.

mm/s, "/s
Maximum Torque

The maximum torque that a motorized rotary device can apply. Note that torque is a function of speed. The maximum torque is obtained at the slowest speed. Maximum torque and maximum speed cannot be achieved simultaneously.

N-cm, oz-in
Mechanical Drive System

Describes the method of converting motor rotation to device motion.

Microstep Size (Default Resolution)

In linear devices, this is the distance corresponding to 1 microstep of the controller at default settings. This may also be referred to as the Default Resolution. This distance is equal to the default microstep resolution (1/64 on most devices) multiplied by the distance corresponding to one full step of the motor.

µm
Microstep Size (Default Resolution)

In rotary devices, this is the angular displacement corresponding to 1 microstep of the controller at default settings. This may also be referred to as the Default Resolution. This displacement is equal to the default microstep resolution (1/64 on most devices) multiplied by the angular displacement corresponding to 1 full step of the motor.

degrees, urad
Minimum Speed

The minimum speed that a motorized device can move.

deg/s, urad/s
Minimum Speed

The minimum speed that a motorized device can move.

mm/s, "/s
Motor Connection

Describes what type of connector is provided on a motor or motorized device to interface with a motor controller.

Motor Frame Size

This is the standard NEMA frame size specification for a motor. It specifies the nominal size of the motor in tenths of an inch (ex size 11 has a nominal size of 1.1 inch square).

Motor Rated Current

Indicates the rated maximum current per phase of the motor used in motorized motion control devices.

mA/phase
Motor Rated Power

Indicates the maximum rated continous power output of the motor used in motorized motion control devices.

Watts
Motor Rotor Inertia

In motorized devices, this is theangular inertia of the rotating parts within the motor. Much like force is the product of mass and acceleration in linear systems, in rotary systems torque is the product of angular inertia and angular acceleration.

g-cm^2
Motor Shaft Diameter

The diameter of the rotating shaft on motors, or motorized devices.

mm, "
Motor Shaft Style

Specifies Single or Double depending whether the motor shaft extends from both sides of the motor or just one.

Motor Steps Per Rev

Specifies the number of steps per revolution of the stepper motor used in the device.

Motor Temperature Rise

In the case of motorized devices, this is the maximum increase in motor temperature above ambient that will occur in open air, during continuous operation at maximum running current at low speeds.

degrees C
Motor Type

Indicates what type of motor is used in motorized motion control devices.

Motor Winding Resistance

Electrical resistance of the windings of the motor.

ohms/phase
Mounting Interface

Indicates how the device itself is mounted, and/or how other parts may be mounted to it.

Operating Temperature Range

The allowable temperature extremes of the operating environment, assuming operation in still air. Note that under vacuum conditions, the upper limit may decrease considerably due to lack of natural convection.

degrees C
Optic Mounting Interface

Indicates how optical components may be mounted to a device such as a motorized mirror mount.

Output Voltage

Output Voltage of power supply.

VDC
Peak Thrust

The maximum force that a motorized device can exert. Note that the force is a function of speed. The maximum force is obtained at the slowest speed. Maximum force and maximum speed cannot be achieved simultaneously.

N, lb
Pitch

Maximum rotation around the Y axis as the stage moves in the X direction

degrees, mrad
Power Plug

The type of power plug required to operate the device.

Power Supply

The DC voltage input required to power a device.

VDC
Range

The maximum physical range of travel of a motion control device.

degrees
Recommended Controller

Indicates what model of motor controller is recommended for a particular motor or motorized device.

Repeatability

The deviation in actual final position when repeatedly instructing a device to move to a target position, approaching from the same direction every time.

degrees, mrad
Repeatability

The deviation in actual final position when repeatedly instructing a device to move to a target position, approaching from the same direction every time.

µm, "
Resolution

The smallest increment that a motion control device can be instructed to move. The actual motion of the device may be different, due to sticktion, backlash or other mechanical issues.

degrees
RoHS Compliant

Indicates if the device is RoHS compliant.

Roll

Maximum rotation around the X axis as the stage moves in the X direction

degrees, mrad
Rotation Center Accuracy

In the case of goniometer stages, this is the possible deviation from the specified value of the location of the center of rotion (a fixed point in space about which the stage rotates).

mm, "
Rotation Center Height

In the case of goniometer stages, this is the distance from the stage surface to the center of rotation (a fixed point in space about which the stage rotates).

mm, "
Speed Resolution

The smallest incremental change in speed that the device can be instructed to move.

deg/s
Speed Resolution

The smallest incremental change in speed that the device can be instructed to move.

mm/s, "/s
Stage Diameter

In the case of a rotary stage, this is the diameter of the stage.

mm, "
Stage Parallelism

In the case of a linear or rotary stage or slide, this represents the maximum deviation in stage height over the surface of the stage with the stage fixed at a single position in the range of travel. This should not be confused with the Vertical Runout.

µm, "
Travel Range

The maximum physical range of travel of a motion control device.

mm, "
Vacuum Compatible

Indicates if the device is vacuum compatible.

Vertical Runout

In the case of a linear or rotary stage or slide, this represents the maximum vertical deviation of a point on the stage surface as the device is moved through its full range of motion.

µm, "
Weight

Weight of the product.

kg
X Travel Range

The maximum physical range of travel of a motion control device along X axis.

mm, "
Y Travel Range

The maximum physical range of travel of a motion control device along Y axis.

mm, "
Yaw

Maximum rotation around the Z axis as the stage moves in the X direction

degrees, mrad