Aerotech BM Series, Руководство по оборудованию

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Appendix A BM/BMS Series Hardware Manual
A-4 www.aerotech.com
Gain
Comparison or ratio of the output signal and the input signal. In
general, the higher the system gain, the higher the response.
Grating Period
Actual distance between graduations on an encoder.
Hall Effect Sensors
Feedback device (HED) used in a brushless servo system to
provide information for the amplifier to electronically commutate
the motor.
HED
Hall Effect Device. (See Hall Effect Sensors)
HMI
Human Machine Interface. Used as a means of getting operator
data into the system. Also, refered to as an MMI.
Home
Reference position for all absolute positioning movements.
Usually defined by a home limit switch and/or encoder marker.
Home Switch
A sensor used to determine an accurate starting position for the
home cycle.
Hysteresis
A component of bidirectional repeatability. Hysteresis is the
deviation between actual and commanded position and is
created by the elastic forces in the drive systems.
I/O
Input / Output. The reception and transmission of information
between control devices using discrete connection points.
IEEE-488
A set of codes and formats to be used by devices connected via
a parallel bus system. This standard also defines communication
protocols that are necessary for message exchanges, and
further defines common commands and characteristics. (See
G.P.I.B.)
Incremental Move
A move referenced from its starting point (relative move).
Inertia
The physical property of an object to resist changes in velocity
when acted upon by an outside force. Inertia is dependent upon
the mass and shape of an object.
Lead Error
The deviation of a lead screw or ball screw from its nominal
pitch.
Lead Screw
A device for translating rotary motion into linear motion. Unit
consists of an externally threaded screw and an internally
threaded carriage (nut). (See Ball Screw)
Life
The minimum rated lifetime of a stage at maximum payload
while maintaining positioning specifications.
Limit Switch
A sensor used to determine the end of travel on a linear motion
assembly.
Limits
Sensors called limits that alert the control electronics that the
physical end of travel is being approached and motion should
stop.
Linear Motor
A motor consisting of 2 parts, typically a moving coil and
stationary magnet track. When driven with a standard servo
amplifier, it creates a thrust force along the longitudinal axis of
the magnet track.
Load Carrying Capability
The maximum recommended payload that does not degrade the
listed specifications for a mechanical stage.
Master-Slave
Type of coordinated motion control where the master axis
position is used to generate one or more slave axis position
commands.