ARRI ALEXA Mini LF Ready to Shoot V-Mount Set (LPL) - Manual (Page 115)

Electronic Control System (ECS) 115
The camera indicates the calibration request by displaying the CAL icon on the home
screen as well as in the status info of the viewfinder and the SDI outputs.
► Select MENU > Electronic Control System (ECS) > Calibrate All Motors to start calibration of all
connected lens motors.
Additionally, motor calibration can be triggered through the hand unit or the motor itself.
NOTICE
Do not trigger a calibration unless all connected motors are attached to the lens.
Lens Motor Configuration
1. Select MENU > Electronic Control System (ECS) > LBUS Lens Motor Configuration .
The following options are available:
Focus/Iris/ Zoom
Motor Torque
Set the torque of a lens motor, available values in the range of 1 (lowest)
to 4 (highest).
Focus/Iris/Zoom
Motor Direction
Available values are Left and Right . Set direction according to motor po-
sition when standing behind the camera.
Focus/Iris/Zoom
Motor Teeth Count
Selects the number of teeth of the motor. Available values are Auto , 40t ,
50t , and 60t .
The motor teeth count setting is only active when a LDA lens table is ac-
tive and is used to assure correct lens table mappings when using a dif-
ferent motor gear than the one the lens table was initially created with.
You may have to change the direction of the Focus, Iris, and Zoom axis motor depending on the
mounting position of the motor (left/right side or top/bottom).
25.3 Lens Data
Lens data can be provided in two different ways, depending on the type of lens:
LDS Lenses
These lenses contain an integrated electronic interface that sends information about focus, iris and
zoom directly to the camera.
Non-LDS Lenses
These lenses do not have an LDS interface, hence information about focus, iris and zoom need to
be gathered from lens motors and translated into sensible values with the help of lens tables. These
lens tables are stored in the camera internal Lens Data Archive (LDA).
Lens Data Archive (LDA)
The LDA contains lens tables which offer lens data functionality with non-LDS lenses in connection with
lens motors. It is possible to add or delete lens tables from the lens data archive. You can transmit LDA
files that are stored on the SD card of the WCU-4 wirelessly to the camera. There is no need to copy
the files from the WCU-4 SD card to USB and then to the camera.
When a non-LDS lens is connected, the user can achieve LDS functionality by using the Lens Data
Archive. In the LDS screen, a button labeled LDA appears when a non-LDS lens is connected. The
LDA screen consists of a user list and a main archive list. The user list should only contain the lenses
currently used to achieve quick access to the desired lens tables. The main archive contains a set
of lens tables for ARRI/Zeiss High Speeds (also known as Super Speeds), Master Primes and Ultra
Primes and can be extended with additional lens tables for any PL-Mount lens.
For information on how to generate a lens table please see the Wireless Compact Unit WCU-4 user
manual.