Aerotech BM Series, Руководство по оборудованию

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BM/BMS Series Hardware Manual Appendix A
www.aerotech.com A-7
via a feedback system.
Settling Time
Time required for a motion system to cease motion once the
command for motion has ended.
Shaft Radial Load
Maximum radial load that can be applied to the end of the motor
shaft at maximum motor speed.
Shaft Runout
Deviation from straight line travel.
Slotless
Describes the type of laminations used in a motor that eliminates
cogging torque due to magnetic attraction of the rotor to the
stator slots.
Stator
Non-rotating part of a magnetic structure. In a motor, the stator
usually contains the mounting surface, bearings, and non-
rotating windings.
Stiction
Friction encountered when accelerating an object from a
stationary position. Static friction is always greater than moving
friction, and limits the smallest possible increment of movement.
Straightness of Travel
Measure of the side-to-side deviation of a stage as it travels in a
horizontal plane.
Torque
Rotary equivalent to force. Equal to the product of the force
perpendicular to the radius of motion and distance from the
center of rotation to the point where the force is applied.
Torque, Continuous
Torque needed to drive a load over a continuous time.
Torque, Peak
Maximum amount of torque a motor can deliver when the
highest allowable peak currents are applied.
Torque, rms
Root Mean Square is a mathematical method to determine a
steadfast or average torque for a motor.
Torque, Stall
The maximum torque without burning out the motor.
Total Indicated Reading
(TIR)
The full indicator reading observed when a dial indicator is in
contact with the part surface during one full revolution of the part
about its axis of rotation.
Tuning
In a servo system, the process of optimizing loop gains (usually
PID terms) to achieve the desired response from a stage or
mechanism from an input command.
Unidirectional
Repeatability
See Repeatability
Velocity Command
Motor driver or amplifier configuration where the input signal is
commanding motor velocity. Motors with analog tachometers are
normally driven by this driver configuration.
Wobble
An irregular, non-repeatable rocking or staggering motion of the
table top of a rotary stage. Wobble is defined as an angular error
between the actual axis of rotation and the theoretical axis of
rotation.
Yaw (of travel)
Rotation about the vertical axis, perpendicular to the axis of
travel. Angular movement (error) that affects straightness and
positioning accuracy.
Yaw Error
Positioning error resulting from a yaw motion.