5.4 VERTICAL LENS DRIVE
The lens vertical drive motor [A] changes the lens vertical position in
accordance with the selected reproduction ratio.
A stepper motor (Approx. 1.8° (0.05 mm)/step) is used to drive the lens
through the lens drive belt.
The lens vertical home position sensor [B] detects the lens vertical position
for full size mode. The motor control PCB keeps track of the lens position
based on the number of pulses sent to the lens vertical drive motor.
The lens vertical drive encoder [C] installed on the drive pulley is used to
detect if the vertical lens base locks.
[A]
[B]
[C]
A171D581.img
31 July 1995
OPTICS
2-27
Summary of Contents for FT8680
Page 3: ...SECTION 1 OVERALL MACHINE INFORMATION ...
Page 8: ...MEMO 31 July 1995 SPECIFICATIONS 1 5 ...
Page 23: ...6 5 IMAGE OVERLAY MODE 2ND SIDE A171V505 wmf PAPER PATH 31 July 1995 1 20 ...
Page 24: ...SECTION 2 DETAILED SECTION DESCRIPTIONS ...
Page 133: ...Timing Chart 1 Stack 2 Paper Feed A171D551 wmf A171D552 wmf 31 July 1995 DUPLEX 2 109 ...
Page 159: ...SECTION 3 INSTALLATION ...
Page 177: ...SECTION 4 SERVICE TABLES ...
Page 229: ...SECTION 5 REPLACEMENT AND ADJUSTMENT ...
Page 362: ...SECTION 6 TROUBLESHOOTING ...