Epson DFX-9000 Service Manual page 224

Epson DFX 9000
Zero indexing
After you assemble the APG Gauge Jig (Dial gauge + Dummy-head),
you must "zero-out" or index the 0 (zero) point on the dial gauge using
the level block.
1. Place the APG Gauge Jig on the level block.
Adjustment
2. Loosen the lock screw that secures the rim of the gauge, and rotate
the rim and dial face to align 0 (zero) with the long needle, as shown.
Tighten the lock screw to secure the dial face position.
Lock screw
Dial
APG Gauge Jig
(Dial gauge +
Dummy-head)
Level block
Adjustment overview
Revision B
217