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Confidential
3.2.2.4 Carriage drive mechanism
The head/carriage unit, which integrates the print head unit and carriage, is supported and guided
by the CR guide rail and CR support chassis. The CR timing belt (1/25.4 inch pitch) transmits the
carriage motor rotation to the carriage. Clockwise motor rotations move the carriage to the right;
counterclockwise ones to the left.
The CR encoder sensor on the back of the head/carriage unit scans the CR encoder strip under the
engine chassis to monitor the current head position relative to the home position. The controller
uses this signal for proportional, integration, differential (PID) control ensuring uniform speed. The
strip's 1/150 dpi markings offer a choice of four speeds to match the print resolution: 40.0, 33.3,
32.0, and 20.0 ips.
CR encoder strip
Idle pulley
CR timing belt
Carriage motor
Carriage
motor pulley
(Paper feed roller)
Head/carriage unit
CR guide rail
CR support chassis
Aging
Maintenance mode function code 69 is for adjusting the initial PWM value. The firmware
automatically adjusts this CR drive parameter as the head/carriage unit works to minimize speed
deviations and to match the current mechanism. This aging sometimes resolves problems with ink
clogging uneven operation.
For further details on maintenance function code 69, see
Summary of Contents for DCP-110C
Page 10: ...Confidential CHAPTER 1 PARTS NAMES FUNCTIONS ...
Page 14: ...1 3 Confidential 1 2 CONTROL PANEL MFC620CN FAX2440C ...
Page 17: ...1 6 Confidential MFC210C ...
Page 21: ...Confidential CHAPTER 2 SPECIFICATIONS ...
Page 87: ...Confidential CHAPTER 3 THEORY OF OPERATION ...
Page 131: ...Confidential CHAPTER 4 TRANSFER OF DATA LEFT IN THE MACHINE TO BE SENT FOR REPAIR ...
Page 136: ...Confidential CHAPTER 55 DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Page 212: ...5 74 Confidential Routing C Backup battery harness and ink supply tubes MFC620CN and FAX2440C ...
Page 214: ...5 76 Confidential Viewed from the left ...
Page 220: ...Confidential CHAPTER 6 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT ...
Page 240: ...6 18 Confidential Vertical Alignment Check Patterns ...
Page 243: ...6 21 Confidential Margin Check Pattern ...
Page 253: ...Confidential CHAPTER 7 CLEANING ...
Page 256: ...Confidential CHAPTER 8 MAINTENANCE MODE ...
Page 267: ...8 9 Confidential Scanning Compensation Data List a b c d e f i ...
Page 274: ...8 16 Confidential Configuration List ...
Page 294: ...8 36 Confidential 1st sheet 2nd sheet Vertical Alignment Check Patterns ...
Page 297: ...8 39 Confidential Margin Check Pattern ...
Page 311: ...Confidential CHAPTER 9 ERROR INDICATION AND TROUBLESHOOTING ...
Page 362: ...App 1 2 Confidential 2 Head property label Property label for the head carriage unit Location ...
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Page 466: ...Confidential February 05 SM FAX028 8CA811 8 Printed in Japan ...