LinearX LT360 - Get Smart Torque

61
LT360 Precision Turntable
DLL Programming Manual
■ Class Get (in)
■ Identifier lt_GetSmartTorque
■ Hex Value 0xAB
■ Call LT360LIB_CmdValue(Handle, lt_GetSmartTorque, RtnStr);
■ Returns 'OFF' or 'ON'
Description
This command returns the status for the Smart Torque feature of the LT360.
The returned string value is either OFF or ON.
This parameter controls the behavior of the stepper motor. When
SmartTorque is set ON, the motor is powered down to half the driving
power 2 seconds after each movement stops. Motor power is returned to
full (as controlled by the Maximum Torque setting) when the motor starts
again.
This feature takes advantage of the fact that the worm gear drive system
employed by the LT360 is irreversible. Meaning, the platter is self-locking at
its current position. The load cannot rotate the platter itself. Therefore, it is
not necessary to maintain full power on the motor merely to hold its current
position when the platter is not in movement.
The use of SmartTorque greatly reduces the thermal heating in the motor
and driver circuitry, and produces a very efficient drive system. Under most
conditions and use, this feature should always be kept ON.
If a particular application demands that the motor power be kept constant at
all times, even when stationary (SmartTorque=OFF), then the maximum
torque should be to 70% or less to prevent excessive heating. It is difficult
to envision what kinds of applications would require this behavior, but the
option is available if needed.
2.42 Get Smart Torque