Epson 680Pro Service Manual - Page 33
Carriage Mechanism, Table 2-1. Carriage Motor Specification
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EPSON Stylus COLOR 680/777/77i Revision B 2.1.3 Carriage Mechanism The carriage mechanism consists of Carriage motor (CR motor), Carriage unit (including printhead), CR timing belt, CR guide shaft, CR guide frame, CR home detector (HP/PE sensor) etc. The carriage mechanism moves the carriage back and forth according to the drive from the carriage motor. The following stepping motor is mounted to drive CR mechanism. (See the table below.) Items Type Drive Voltage Coil Resistance Inductance Drive Method Driver IC Table 2-1. Carriage Motor Specification Specifications 4-Phase/ 200-Pole HB Stepping motor +42 V +/ - 5% (DRV IC voltage) 7.8 Ω +/ - 10% (per phase at 25 degree) 14 mH +/ - 20%(1KH 1VmA) Bi-Polar drive LB11847 The drive from CR motor is transferred to the CR unit via CR timing belt. And the CR home position is detected with the HP/PE sensor. This sensor is available as CR HP detector only in the HP (home position) detection sequence & pump operation sequence. (not available in the paper feeding sequence for the CR HP detector because it is used for only PE sensor during the paper feeding sequence.) Moreover, unlike the previous products, this printer dose not have the PG adjustment mechanism (1.7mm). HP/PE Sensor CR Motor CR home position is detected with the HP/PE/IC sensor and the detection plate molded in the CR unit as following figure. When the CR home position is detected with this sensor, HIGH signal is output to the CPU. HP detection Lever Right side view CR HP detection plate HP/IC detection Lever CR HP detection plate Low signal Figure 2-5. CR home position High signal CR unit CR Guide shaft CR Timing belt Figure 2-4. Carriage Mechanism (Top view) Operating Principles Overview 33