Lb

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/IC 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).

Figure 2-4. Carriage Mechanism (Top view)

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.

Right side view

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.

Right side view

Figure 2-5. CR home position

Unlike the previous products, I/C detection sensor is not built in the CR unit. The I/C is detected with the HP/PE/IC sensor and the detection plate molded on the I/C cover as following figure. The I/C installation condition is monitored only when the CR unit moves to the I/C detection position (HP detection sequence). So, this sensor function is not available in the paper feeding sequence. When the I/C is not installed into the CR unit, HIGH signal is output to the CPU.

Figure 2-6. I/C detection position (

Figure 2-4. Carriage Mechanism (Top view)

2.1.4 Paper Feeding Mechanism

The paper feeding mechanism consists of Paper feed motor (PF motor), PF roller, Paper eject roller, Star wheel roller, and so on. The paper feeding mechanism feeds paper loaded from ASF using the PF roller and Paper Eject Roller & Star wheel roller. For this mechanism, the PF motor mentioned in the right Table 2-2 is used on this product.

The drive of the PF motor is transfer to the PF roller and the Paper Eject Roller as following Figure 2-7. Following shows you how to transfer the PF motor drive to the PF roller and the Paper Eject Roller.

□ PF motor drive transmission path

PF Motor Pinion Gear (CW) R Combination Gear 8.4, 21.6 (CCW) R Combination Gear 9.6, 33.6(CW) R Spur Gear 15 (PF roller)(CCW) R Spur Gear 34.2 (CW) R Spur gear 15 (CCW)

Table 2-2. PF Motor Specifications

Item

Description

Motor type

4-Phase/ 48-Pole PM Stepping motor

Drive voltage

+42 V +/ - 5% (DRV IC voltage)

Coil Resistance

10 Q +/ - 10% (per phase)

Inductance

10.5 mH +/ - 20%(1kH 1Vrms)

Driving method

Bi-Polar drive

Driver IC

0 0

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