THORLABS TST101 User Manual page 37

T-Cube Stepper Motor Controller
6.3.5 Advanced Tab
Fig. 6.8 Stepper Driver T-Cube - Advanced Settings
Potentiometer Settings
The potentiometer slider is sprung such that when released it returns to it's central
position. In this central position the motor is stationary. As the slider is moved away
from the centre, the motor begins to move. Bidirectional control of motor moves is
possible by moving the slider in both directions. The speed of the motor increases up
to the value set in the Velocity parameter.
The velocity profile is derived from the 'Velocity Profile' settings in the 'Move/Jogs'
settings tab.
Power Settings
The Stepper Driver T-Cube is designed to vary the phase powers (current) in the
motor coils depending on the operating state of the motor - moving or stationary.
Typically, when a stepper motor is at rest it is advisable to reduce the phase (holding)
currents so that the motor does not overheat. When moving, these phase currents are
boosted to provide sufficient motor torque and minimise the possibility of stalling
(missed steps) The moving phase powers are set automatically by the unit and cannot
be adjusted.
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