Flow Rate Control - National Optronics Horizon II Instruction Manual

FLOW RATE CONTROL:

The Flow Control Cycle feature is used when edging dense material lenses, such as
polycarbonate or high index, particularly blanks over 75mm. To engage the cycle, press the
Rimless and Pause buttons on the control panel. The LED (red light) between the two will
light up, indicating that the flow rate control is engaged. The Flow Control Knob can then be
set to a feedrate. The higher the number on the dial, the faster the feed. The feedrate per lens
revolution will range from approximately 1mm (Setting #1) to 8mm (Setting #5).
Once the lens has roughed down, the operator must release the Rimless and Pause
buttons in order to finish the lens.
Use of this feature will prevent axis slippage when edging dense material lenses,
while allowing these lenses to be edged in one cycle. Also, in the case of thin centered, anti-
refection coated lenses, the flow rate control can minimize the strain put on the center of the
lens.
The Flow Control Cycle is a standard feature on all edgers shipped after April 1990.
Retrofit kits are available for Horizon II's shipped prior to that date.
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OPERATING PROCEDURES
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Charlottesville, VA 22902
Revision: 11/98 Page - 16 -