Description; Introduction And Description - Vinten Vision 250 Service Manual

Contents
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Description

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Introduction
1 The Vision 250 pan and tilt head is part of a range designed for broadcast professional, film, corporate
and educational use. It is constructed largely in aluminium and magnesium alloys to produce a robust,
lightweight unit. The unique counterbalance system enables a wide variety of camera/lens combinations to be
maintained in perfect balance over the range of tilt movements. A maximum tilt angle of 90° is available at
intermediate loadings, whilst at higher loadings the range of tilt motion is progressively reduced. A graph is
provided in Section 2 which illustrates the relationship between load and centre-of-gravity (C of G) and may
be used to ascertain the suitability of the head for any given combination of camera, lens and accessories.
2 Drag is provided by the patented Vinten 'thin film' (TF) system which allows wide variation of the drag
setting on both pan and tilt axes to suit operator preference, and permits "whip" movements to be executed,
irrespective of drag setting. Pan and tilt axes are each provided with a brake.
Description
3 The Vision 250 pan and tilt head
assemblies, brakes on the pan and tilt mechanisms and a camera mounting plate.
4 The balance system is easily adjusted by a knob
payloads that can be balanced, and tilt ranges, are dependent on the weight of the camera and accessories
and on the centre-of-gravity (C of G) height. The control compensates for differing platform loads by varying
the compressive force on the counterbalance spring.
5 A digital display (6)
illuminated by pressing the switch
adjustments are complete. The same switch also illuminates the level bubble
tilt drag knobs (12)(15). A sensor
If the ambient light level is high, the level bubble and drag knob scales will not be lit. The battery for the system
is housed in a compartment in the base of the head, closed by a cover (9).
6 Both the pan and tilt mechanisms incorporate the Vinten thin film (TF) system to ensure smooth
movement of the camera about these axes and are fitted with control knobs
The whip-pan facility is unaffected by the pan drag setting. Both drag knobs are provided with scales
illuminated by the switch (14).
Section 1

Introduction and Description

(Fig 1.1) embodies a spring counterbalance mechanism, TF drag
indicates the setting of the balance mechanism on a scale of 00 - HI. The display is
(14) and extinguishes automatically approximately 15 seconds after
(5) automatically compensates for ambient light levels and dims the display.
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(2) on the rear of the head. Maximum and minimum
(4)
(12)(15)
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Para
and the scales of the pan and
to adjust the drag setting.
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