National Instruments NI-Motion User Manual
Page 293
Glossary
© National Instruments Corporation
G-5
M
m
meters
MCS
Move Complete Status
microstep
Proportional control of energy in the coils of a Stepper Motor that allow the
motor to move to or stop at locations other than the fixed
magnetic/mechanical pole positions determined by the motor
specifications. This capability facilitates the subdivision of full mechanical
steps on a stepper motor into finer microstep locations that greatly smooth
motor running operation and increase the resolution or number of discrete
positions that a stepper motor can attain in each revolution.
modulo position
Treat the position as if it is within the range of total quadrature counts per
revolution for an axis.
N
noise
Undesirable electrical signal. Noise comes from external sources such as
the AC power line, motors, generators, transformers, fluorescent lights,
soldering irons, CRT displays, computers, electrical storms, welders, radio
transmitters, and internal sources such as semiconductors, resistors, and
capacitors. Noise corrupts signals.
non-inverting
Polarity of a limit switch, home switch, and so on, in active state. If these
switches are active high, they have non-inverting polarity.
O
open collector
Method of output capable of sinking current, but not sourcing current.
open-loop
Refers to a motion control system where no external sensors, or feedback
devices, are used to provide position or velocity correction signals.