Instruction manual

ARRI WCU-4 User Manual 21
Sub-Menu MOTOR TORQUE
U sing CLM-3 and CLM-4 motors, the motor torque can be adapted to the kind of lens
and application, especially to prevent sensitive lenses from mechanical overload.
For small, less ruggedly designed lenses, the torque should be set to lower values.
F or high speed applications and large lenses, the torque may be set to higher values.
For connected CLM-2 motors no torque adjustment is available.
The display will show no support in this case.
If no motor is connected, the display will show n/a.
UP or
DOWN Select the focus, iris or zoom motor.
CHANGE Change the torque limit.
Shown settings:
Focus: Torque level 4 (1-4 available).
Iris: No torque setting possible (CLM-2 motor).
Zoom: Not connected to the WCU-4.
CLM-3 lens motors provide very high torque for high speed lens drive. Be sure that
lens, lens motors and rods are correctly adjusted and fastened.
Take care to re-calibrate the CLM-3 motor after re-attachment of the motor and
after each lens change!
Ignoring this procedure can lead to severe lens damage.
Note: If the torque level is not adequate to lens properties or operation temperature, the electronic
torque limitation may cause a high-frequency noise.
Use a higher torque level to reduce this effect.