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Glossary
© National Instruments Corporation G-5 7344/7334 Hardware User Manual
following error
trip point
the difference between the instantaneous commanded trajectory position
and the feedback position
FPGA Field Programmable Gate Array
freewheel the condition of a motor when power is de-energized and the motor shaft is
free to turn with only frictional forces to impede it
full-step full-step mode of a stepper motor—for a two phase motor this is done by
energizing both windings or phases simultaneously
G
Gnd ground
GND ground
H
half-step mode of a stepper motor—for a two phase motor this is done by alternately
energizing two windings and then only one. In half step mode, alternate
steps are strongand weak butthere is significant improvement inlow-speed
smoothness over the full-step mode.
hex hexadecimal
home switch (input) A physical position determined by the mechanical system or designer as the
reference location for system initialization. Frequently, the home position is
also regarded as the zero position in an absolute position frame of reference.
host computer computer into which the motion control board is plugged
I
ID identification
in. inches
index marker between consecutive encoder revolutions