Motor Mode; Pan And Tilt Control; Zoom, Focus, And Iris Control - AMX AXB-PT101530 POSITRACK CAMERA CONTROLLER Instruction Manual

Introduction

Motor Mode

Motor mode is used when the lens requires the motors be directly driven from an external source.
The standard voltage ranges are ± 6 VDC or ± 12 VDC with a center (no motion) of 0 VDC. Unlike
servomotor lenses, these only operate in speed mode.
The lens moves in relation to the voltage offset from zero. The farther the voltage moves away from
the center point, the faster the lens motor moves. The lens must have POT outputs when recalling a
preset in this mode, these outputs are then passed to the PosiTrack unit. When the received voltage
level matches the level stored in the preset, the voltage returns to zero. Motor mode lenses not
having POT outputs do not have preset recall capability.

Pan and Tilt Control

Presets and travel limit stops are based on encoder counts from a home position index, located at
the center of each axis' range of motion.

Zoom, Focus, and Iris Control

Each PosiTrack unit delivers a low voltage pulse-width-modulated output for zoom, focus, and iris
functions for motor mode lenses. These units are also capable of receiving reference voltage rails
and sending zoom, focus, and iris control signals in response to these rails. In this setting (slide-
switch configured), no active control signals will reach the lens before power (+ 12 VDC and
GND) is supplied to the lens. This motor mode applies to the control of the Fujinon and Canon
teleconferencing lenses. During preset recall operation, these outputs are synchronized with the pan
and tilt motions. Refer to the PosiTrack Unit Lens Compatibility table on page 1. Four solid state
relays are also provided to control the zoom, focus, and iris speed/position mode selection and iris
local/auto selection on the Fujinon MD series and Canon KTSA series lenses.
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Speed mode moves the lens when the voltage deviates from the center point of its range.
The farther the voltage moves away from the center point of reference, the faster the lens
motor moves. The lens must have POT outputs when recalling a preset in this mode,. The
outputs pass to the PosiTrack unit, and when the received voltage level matches the level
stored in the preset, the voltage returns to zero. Servomotor speed mode lenses not
having POT outputs do not have preset recall capability.
AXB-PT10/15/30 PosiTrack Camera Controllers