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2) Considerations for projector installation method

When selecting a method for installing (securing) projectors, the method that allows the

minimum amount of mechanical position displacement or movement caused by vibration,

or position shift with time should be selected.

Regardless of whether a floor mount or ceiling hanging installation is used, the five screw

holes furnished for the ceiling mount should be used to secure the projector. The screw

holes for the legs of the set should not be used, because the deformation of the plastic

cabinet by temperature affects the positional stability of the projector.

Rear projection method

In the case of edge blending using a short-focus fixed lens, a rear projection mirror

system is used as mentioned earlier, but advance registration that accurately records the

dimensions and position is important.

In three-dimensional contour adjustment using an optical projector adjustment platform or

for distortion correction using polycarbonate screws in the reflection mirror, an adjustment

method designed to eliminate positional displacement caused by the change in backlash

of the bolts and screws with time is important.

The installation manual for the rear projection mirror system should be referenced for the

specific adjustment method.

When using a short-focus zoom lens, a sturdy platform or mirror stand should be used.

A projector installation platform with an angle adjustment function in the horizontal and

vertical directions and for left-right swing is a convenient way of making fine position

adjustments.

When securing the projector to a platform, use of the equipment legs (4 places) for

permanent installation or just securing with a band should be avoided in order to prevent

image shifts. The five screw holes furnished to allow the projector to be suspended from

the ceiling should always be used to secure the unit.

Front projection system

In principle, the same considerations and cautions for rear projection apply to front

projection.

When using a short-focus zoom lens (ET-D75LE6) or super long-focus zoom lens

(ET-D75LE8), a considerable weight is applied to the lens tip and the image position may

shift as a result of vibration, temperature drift or changes over time.

Use of a bracket to support and secure the lens tip is recommended.

When using a hanging bracket, the bracket for a low ceiling should be used as a rule.

In the case where a bracket for a high ceiling is used due to the building structure, an

additional bracket to prevent swing must be used. In addition, the drop prevention wire

included in the hanging bracket must also be used.

* Points to keep in mind

When a projector is mounted with a high-ceiling bracket or custom-made poles and

hanging bolts apart from the building ceiling, vibration moment from the building may

cause image rocking, or changes in environmental temperature by air-conditioning etc

combined with metal shrinkage may cause image shifts.

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