Operating Specifications; Air Pressure; Lens Spindle Speed; Carriage Flow Rates - National Optronics Horizon II Instruction Manual

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The recommended operating pressure of the edger is 80 psi. This should be adjusted

by the regulator located on top of the air filter on the right side of the unit. Should it be

allowed to drop too low, lens slippage could occur. Excessive pressure, on the other hand,

could result in premature clamp wear or lens damage. In some lenses involving fragile A/R

coatings, this pressure msg. need to be reduced to 60 psi.

The tracking pressure is set at the factory at 35 psi. If flexing of thin patterns or

lenses occurs, or when making a pattern from a lens, you may reduce the pressure. If is

reduced below 25 psi, however, poor tracking may result. This will be indicated by misshape

due to the pattern not tracking the pattern, or erratic bevel due to the bevel guide wheel not

tracking the front of the lens.

The lens drive motor is an induction type, and its speed will not deviate. For

reference purposes, the spindle shaft should make 1 revolution in approximately 9.4 seconds.

The carriage flow rates are set by the use of Flow Restrictors and are not adjustable.

However, the flow rates should be verified occasionally.

The lens drive carriage flow cylinder shaft should take 26 to 29 seconds to fully

retract into its cylinder from the time the Start switch is depressed, or its control solenoid is

activated manually. If the flow rate is found to be out of tolerance, refer to the

Troubleshooting Guide for further diagnostics.

The cutter motor carriage flow cylinder shaft should take approximately 1 second to

move to the left when its control solenoid is activated manually. When the control solenoid

is released, the cutter motor carriage should take approximately 2.5 seconds to move to the

right. If the flow rate is found to be out of tolerance, refer to the Troubleshooting Guide for

further diagnostics.

The differential should take 1.5 to 2 seconds to close. To verify, pull the pattern

roller lightly towards the front of the edger with the left hand and hold it there, then switch

the power on and off with the right hand, pausing 5 seconds between positions. When

NATIONAL

INCORPORATED

OPERATING SPECIFICATIONS

Tel: 434-295-9126 Tech Support: 800-247-9796 Fax: 888-239-0778

100 Avon Street, P.O. Box 1547

Charlottesville, VA 22902

Revision: 11/98 Page - 29 -

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