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high-side switch
home switch (input)
I
incremental encoder
index
L
limit switch/
end-of-travel position
(input)
low
low-side switch
M
microstep
© National Instruments Corporation
A switch that provides a path to supply when closed.
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.
A device that produces two signals, Phase A and Phase B, which are
90 degrees out of phase, allowing for edge counting to provide relative
position information.
Marker on an encoder that produces a single signal per revolution and is
typically used to establish a reference position.
Sensors that alert the control electronics that the physical end of travel is
being approached and that the motion should stop.
An input or output is low if the voltage is lower than the specified digital
logic low level.
A switch that provides a path to ground when closed.
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.
G-3
Glossary
NI 951x User Manual
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