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LFP Quick Start Guide
10
Zeroing the axes
At the beginning of each session, right after loading the head, you need to
zero the axes . This defines a base position at which all head positions and
lens settings are set to zero (0) in the LFP. All limits, lens controls, preset
positions, and moves that are stored in the LFP are measured relative to
this base position. The zero points themselves are not stored in the head
or lens when the power is off, so you need to define them at the start of
each session, by zeroing the axes.
You can zero the axes in two ways, depending on how you want to
calibrate the head direction:
•
Zero the axes manually - you use the controls to point the
camera in the direction that you want to use as the zero
position for the head axes. See
Zeroing the axes manually on
page 11.
•
Zero the axes by homing - the LFP automatically moves the
head to its “home” position, and uses that position as the zero
position. The “home” position is the head’s centre of motion, as
determined by the limit sensors built into the head hardware.
You can only use this method if your head has a homing
facility and your LFP is in Film mode. See
Zeroing the axes by
homing on page 12.
Hint
If you are using a lens with
external Lens Control
Motors
(LCMs), you need to make
sure that the LFP controls
move the focus, zoom, and iris
rings in the correct direction,
before you zero the axes. Refer
to
Zeroing lens axes with
external Lens Control Motors
on page 64.