National Instruments Motion Control 7334 User Manual page 57

following error
trip point
FPGA
freewheel
full-step
G
Gnd
GND
H
half-step
hex
home switch (input)
host computer
I
ID
in.
index
© National Instruments Corporation
the difference between the instantaneous commanded trajectory position
and the feedback position
Field Programmable Gate Array
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 mode of a stepper motor—for a two phase motor this is done by
energizing both windings or phases simultaneously
ground
ground
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 strong and weak but there is significant improvement in low-speed
smoothness over the full-step mode.
hexadecimal
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.
computer into which the motion control board is plugged
identification
inches
marker between consecutive encoder revolutions
G-5
Glossary
7344/7334 Hardware User Manual