Aptc Detection Position Adjustment - Epson DFX-9000 Service Manual

Epson DFX 9000

5.3.3 APTC detection position adjustment

Before performing this adjustment, make sure to perform
C H E C K
P O I N T
the "TOF Sensor Sensitivity Adjustment" Refer to
sensor sensitivity adjustment (p.
Summary
The APTC mechanism compares the number of APTC Motor drive
steps detected from home-position to the platen, and home-position to
the paper. The difference between these two distances is assumed to be
the thickness of the paper.
The number of APTC Motor drive steps to move the printhead a given
distance, e.g., from the APTC home position to the platen or paper, is
predetermined based on assumed mechanical dimensions. Due to
manufacturing variances of the components that comprise the APTC
mechanism, (APTC Motor, Carrier mechanism), the timing used to
detect the contact of the printhead with a target also varies, and this
affects the detection precision.
This adjustment is performed to determine the number of APTC Motor
drive steps necessary to compensate for the dimensional variances of the
APTC mechanism.
Adjustment
TOF
235).
Software adjustment
Figure 5-23. APTC detect position variance
This adjustment is required after you remove or replace these parts:
PR MECHA ASSY
CARRIER UNIT
ROM BOARD (only when the EEPROM Data Copy fails)
Tools / materials: Adjustment Program
Paper: 1 sheet of 64 g/m
10 sheets of 50 g/m
APG PT Jig (P/N: 1422622)
APG Gauge Jig (P/N: 1422621)
Revision B
2 (17 lb) paper
2
(13 lb) paper
241