Simplifying Motion Control

Glossary

Term Units Description
2D Primitives Supported 2D commands that generates a particular type of line segment or curve.
5 V Power Out Current Rating Units:  mA The total amount of current that the 5 V outputs can provide to external devices, such as encoders, hall sensors and devices connected to I/O.
Accuracy (unidirectional) Units:  degrees, mrad The maximum error possible when moving between any two positions, when both positions are approached from the same direction.
Accuracy (unidirectional) Units:  µm, " The maximum error possible when moving between any two positions, when both positions are approached from the same direction.
Adjacent Optic Change Time Units:  ms The time for the device to move between two adjacent optic positions, including communication time, when using default controller settings.
Analog Input Number of analog inputs available.
Analog Input Range Units:  V Allowable input voltage range of analog inputs.
Analog Input Resolution Units:  V The smallest incremental voltage measurable or resolvable on the analog input.
Angular Motion Per Motor Rev Units:  degrees The angular motion of the stage top corresponding to one complete revolution of the motor.
Aperture Diameter Units:  mm, " This is the diameter of the optical mounting hole (aperture) of the device.
Axes of Motion 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 Units:  µm, " The maximum difference in the actual position possible when a target position is approached from opposite directions.
Backlash Units:  degrees, mrad The maximum difference in the actual position possible when a target position is approached from opposite directions.
Built-in Controller Specifies whether the device has an integrated controller or requires an external controller for operation.
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.
Communication Interface The type of electrical interface used to send commands to the controller. Some examples of communication interfaces are USB 2.0, RS-232, and RS-485.
Communication Protocol The way in which the commands are formatted to send to the device. Please click on the "Communication Protocol" specification for a link to "Protocol Reference Manuals", or visit the support section of our website. The way in which the commands are formatted to send to the device. For more information on control protocols or the specific communication protocols used by Zaber, please see our tech article, Simplifying Control Protocols. Protocol Reference Manuals are provided on the Support Tab of our website.
Compatible Optic Diameter The optic diameter dimension(s) accommodated by the device or accessory.
Compatible Optic Thickness Units:  mm, " The maximum thickness of optics accommodated by the device or accessory.
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 Units:  mA, mA peak This is the maximum current that the controller can put out per phase of stepper motor.
Current Rating Units:  A Rated output current of power supply.
Data Cable Connection Describes the cable and connector type required to communicate with a motion control device.
Default Resolution Units:  of a step The default microstep size as a fraction of a full step.
Display Describes the display type on devices with LCD displays.
Encoder Count Size Units:  deg/count, arc sec/count This is the angular motion of the rotary device per count of the encoder. Counts depend on the number of lines on the encoder disc and the interpolation of the encoder read head.
Encoder Resolution Units:  CPR, states/rev This is the line density of the encoder which indicates how many counts or signals are given per revolution.
Encoder Resolution Units:  nm The smallest increment that can be read from the encoder.
Encoder Type Describes the type of encoder included.
Extension Cable Length Units:  m, ' Length of extension cable.
Force Constant Units:  N/A, lbs/A The typical amount of force per amp output from a direct drive device.
Force Resolution Units:  mN, oz The smallest increment of force that can be output by a device in force mode.
Guide Type The type of guide used to constrain the stage to the axis of motion.
Horizontal Runout Units:  µm, " The maximum horizontal deviation of the centre of the stage top from the axis of travel as the device is moved through its full range of motion.
Inductance Units:  mH/phase Inductance of each phase of the motor.
Input Voltage Units:  VAC Input voltage of power supply.
Isolated Digital Input Number of opto-isolated digital inputs available.
Isolated Digital Output Number of opto-isolated digital outputs available.
Joystick Control Describes the various control modes.
LED Indicators Indicates the number and purpose of LED indicator lights.
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 Units:  mm, " The linear motion corresponding to one complete revolution of the motor.
Loaded Backlash (10 N) Units:  µm, " The maximum difference in the actual position possible when a target position is approached from opposite directions with a 1 kg load on the device. Applies to products where the expected load is along the axis of travel.
Manual Control Indicates the presence and type of control knob for manually sending movement commands to the device.
Maximum Angular Momentum Units:  kg-m^2/s The maximum recommended angular momentum for a load placed on the stage top (moment inertia of the load about the axis of rotation of the stage, multiplied by the stage angular velocity in rad/s). This is based on the maximum kinetic energy that the rotation stage can absorb in the event of a sudden stop at the maximum speed. Exceeding the rated angular momentum will result in reduced lifetime for the stage.
Maximum Cantilever Load Units:  N-cm, oz-in The maximum torque that may be applied about the axis of motion.
Maximum Centered Load Units:  N, lb 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.
Maximum Continuous Thrust Units:  N, lb The maximum recommended continuous operating load applied in the direction of travel of a linear motion device. Note that this may be less than the maximum force the device is capable of exerting. Exceeding this force will result in reduced lifetime.
Maximum Continuous Torque Units:  N-cm, oz-in The maximum recommended continuous operating torque of a rotary motion device. Note that this may be less than the maximum torque the device is capable of exerting. Exceeding this force will result in reduced lifetime.
Maximum Current Draw Units:  mA 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.
Maximum Dynamic Load Units:  N, lb The maximum allowable force that can be applied at the center of the stage, perpendicular to the stage surface while the stage is in motion.
Maximum Speed Units:  deg/s, rpm The maximum speed at which a motorized device can move under no load. Note that the speed is a function of load and the maximum speed can only be achieved at low loads.
Maximum Speed Units:  mm/s, "/s The maximum speed at which a motorized device can move. Note that the speed is a function of load and the maximum speed can only be achieved at low loads.
Maximum Static Load Units:  N, lb The maximum allowable force that can be applied at the center of the stage, perpendicular to the stage surface while the stage is in a fixed position. Exceeding this load can result in damage to the stage.
Maximum Torque Units:  N-cm, oz-in The maximum torque that a motorized rotary device can apply. Note that torque is a function of speed and the maximum torque is obtained at the lowest speeds.
Mechanical Drive System Describes the method of converting motor rotation to device motion.
Microstep Size (Default Resolution) Units:  µm The calculated linear distance traveled for each microstep of motor movement at default settings. This distance is equal to the default microstep resolution (1/64 on most devices) multiplied by the distance traveled during one full step of the motor.
Microstep Size (Default Resolution) Units:  degrees, µrad The calculated angular displacement for each microstep of motor movement at default settings. This displacement is equal to the default microstep resolution (1/64 on most devices) multiplied by the angular displacement traveled during one full step of the motor.
Minimum Speed Units:  deg/s, µrad/s The minimum speed that a motorized device can be set to.
Minimum Speed Units:  mm/s, "/s The minimum speed that a motorized device can be set to.
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 Units:  mA/phase Indicates the rated maximum current per phase of the motor used in motorized motion control devices.
Motor Rated Power Units:  Watts Indicates the maximum rated continuous power output of the motor.
Motor Rotor Inertia Units:  g-cm^2 In motorized devices, this is the moment of inertia of the rotating parts within the motor.
Motor Shaft Diameter Units:  mm, " The diameter of the rotating shaft on motors, or motorized devices.
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 Units:  degrees C The maximum increase in motor temperature above ambient that will occur in open air, during continuous operation at maximum running current and low speeds.
Motor Type Indicates what type of motor is used in motorized motion control devices.
Motor Winding Resistance Units:  ohms/phase Electrical resistance of the windings of the motor.
Mounting Interface Indicates how the device may be mounted to other components, and how other devices or accessories may be mounted to the device.
Moving Mass Units:  kg, lbs The amount of mass being driven in a stage.
Number of Optics The number of optics that can be mounted in the device or accessory.
Operating Temperature Range Units:  degrees C 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.
Optic Mounting Interface Indicates how optical components may be mounted to a device such as a motorized mirror mount.
Output Voltage Units:  VDC Output voltage of power supply.
Peak Thrust Units:  N, lb The maximum force that a motorized device can exert in the direction of travel. Note that thrust is a function of speed and the maximum thrust is obtained at the lowest speeds.
Pitch Units:  degrees, mrad Maximum rotation around the Y axis as the stage moves in the X direction.
Power Plug The type of plug required to provide power to the device.
Power Supply Units:  VDC The DC voltage input required to power a device.
Probe Angle Range Units:  degrees, rad The angular movement possible of a product.
Probe Diameter Range Units:  mm, " The range of probe sizes that can be used within the product.
Range Units:  degrees The maximum physical range of travel of a motion control device.
Recommended Controller Indicates what model of motor controller is recommended for a particular motor or motorized device.
Repeatability Units:  degrees, mrad The maximum deviation in actual position when repeatedly instructing a device to move to a target position 100 times, approaching from the same direction every time, under stable thermal conditions.
Repeatability Units:  µm, " The maximum deviation in actual position when repeatedly instructing a device to move to a target position 100 times, approaching from the same direction every time, under stable thermal conditions.
Resolution Units:  degrees 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.
RoHS Compliant Indicates if the device is RoHS compliant. See the RoHS Certificate of Conformance.
Roll Units:  degrees, mrad Maximum rotation around the X axis as the stage moves in the X direction.
Rotation Centre Accuracy Units:  mm, " The possible deviation from the specified center of rotation (a fixed point in space about which the stage rotates).
Rotation Centre Height Units:  mm, " The distance from the stage surface to the center of rotation (a fixed point in space about which the stage rotates, usually for goniometers).
Speed Resolution Units:  deg/s The smallest incremental change in speed that can be achieved by the device.
Speed Resolution Units:  mm/s, "/s The smallest incremental change in speed that can be achieved by the device.
Stage Diameter Units:  mm, " In the case of a rotary stage, this is the diameter of the stage top.
Stage Parallelism Units:  µm, " The maximum deviation in height of the stage top, with respect to the stage base, measured at one position in travel. The angle between the stage top and base will vary over travel due to the pitch and roll of the stage.
Stiffness in Pitch Units:  N-m/deg, µrad/N-m The rotational stiffness of a linear stage about its Y-axis.
Stiffness in Roll Units:  N-m/deg, µrad/N-m The rotational stiffness of a linear stage about its X-axis.
Stiffness in Yaw Units:  N-m/deg, µrad/N-m The rotational stiffness of a linear stage about its Z-axis.
Travel Range Units:  mm, " The maximum physical range of travel of a motion control device.
Vacuum Compatible Indicates if the device is vacuum compatible.
Vertical Runout Units:  µm, " The maximum change in height of the centre of the stage top, as the device is moved through its full range of motion.
Weight Units:  kg Weight of the product.
X Travel Range Units:  mm, " The maximum physical range of travel of a motion control device along X axis.
Y Travel Range Units:  mm, " The maximum physical range of travel of a motion control device along Y axis.
Yaw Units:  degrees, mrad Maximum rotation around the Z axis as the stage moves in the X direction.