User Manual

142 ALEXA SXT Plus
15.2.2 Lens Motors
The ALEXA SXT Plus supports ARRI CLM-2, CLM-3, CLM-4, CLM-4 Plus, and CLM-5
motors and the LDE-1. CLM-1 motors are not supported. CLM-2, CLM-3, CLM-4,
CLM-4 Plus and CLM-5 motors can be used in a mixed setup.
NOTICE
Use only one lens motor per lens axis.
Lens motors should be connected, according to their position on the lens, to the IRIS,
FOCUS and ZOOM sockets on the camera-right side.
Motor calibration
After connecting a lens motor to the camera and the lens, it must be calibrated. The
lens motor must be recalibrated under the following conditions:
•
when the lens motor is detached from the lens
•
after a camera reboot
•
after changing lenses
•
after a change in motor position while powered down
NOTICE
Omitting motor calibration might lead to damage of the lens due to the high level of
motor torque.
To calibrate a motor:
1. Press the WRS button.
2. Select a motor by pressing the IRIS CLM, ZOOM CLM or FOCUS CLM button.
3. Press CALIBRATE to start calibration of this motor only, or CAL. ALL to start
calibration of all motors.
Motor direction
The direction of the motors can be set in the ALEXA's menus.
To set the direction of a motor:
1. Press the WRS button.
2. Select the motor by pressing the IRIS CLM, ZOOM CLM or FOCUS CLM button.
3. Press the LEFT or RIGHT button to set the direction of the lens motor.
Motor torque
For all supported motors except for CLM-2 motors, the motor torque can be set in the
ALEXA's menus.
To set the torque on a lens motor:
1. Press the WRS button.
2. Select the lens by pressing the IRIS CLM, ZOOM CLM or FOCUS CLM button.
3. Press the +1 or -1 buttons to increase or decrease the motor's torque. Available
torque settings are 1 to 4, with 1 being the lowest torque level.
NOTICE
Ensure that the motor torque level matches the lens to avoid lens damage.