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A. The Bevel Guide Wheel is set too low. If the BGW is not set the proper
distance from the cutting blades, the lens may ride up on the edge of the
Teflon ring. Follow the procedures on Page 28 for setting BGW height.
B. Differential is not closing. Follow the procedures on Page 31 for verifying
the differential flow rate.
Carriage Flow:
LENS DRIVE FORWARD FLOW RATE IS TOO SLOW:
Blocked Flow Restrictor. Locate the IFC-14 restrictor/check valve in airline
#6 of the Lens Drive Carriage Flow Cylinder, and follow the procedures on
Page 49 for removal and cleaning.
LENS DRIVE FORWARD FLOW RATE IS TOO FAST:
A. Air Leak. Check the fittings and air connections on the flow cylinder and the
solenoid for leaks.
B. Open Check Valve. Locate the IFC-14 restrictor/check valve, located in
airline #6 of the Lens Drive Carriage Flow Cylinder, and follow the
procedures on Page 49 for removal and cleaning.
LENS DRIVE WILL NOT FLOW FORWARD:
A.
Blocked Restrictor. Locate the IFC-14 restrictor/check valve in
airline #6 of the Lens Drive Carriage Flow Cylinder, and follow the
procedures on Page 49 for removal and cleaning.
B.
Open Check Valve. Locate the 1375-2 check valve, in airline #11
of the Lens Drive Carriage Flow Cylinder, and follow the procedures on Page
49 for removal and cleaning.
C.
Solenoid Valve Malfunction. Refer to Page 45 for Solenoid
identification and troubleshooting.
LENS DRIVE REARWARD FLOW RATE IS TOO SLOW OR WILL NOT
FLOW AT ALL:
Blocked Flow Restrictor. Locate RF354 restrictor, in airline #5 of the Lens
Drive Carriage Flow Cylinder, and follow the procedures on Page 49 for
removal and cleaning.
CUTTER MOTOR FLOW TO THE LEFT IS TOO SLOW OR WILL NOT
FLOW AT ALL:
NATIONAL
INCORPORATED
TROUBLESHOOTING
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 - 40 -
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