Table Paper Feed Motor Control Drive Circuit Specifications

Supply voltage

36.5 ± 1 VDC (voltage applied to the driver circuit)

Current consumption (per phase)

1.75 ± 0.20 A (driving, average) 0.20 ± 0.02 A (holding)

Drive frequency

2610 PPS (Middle speed mode, constant speed) 4274 PPS (High speed mode, constant speed)

Driving method

Chopper constant current drive, 1-2 phase excitation

Paper feed pitch

1/2 16" (O. 12 mm): 2 steps 1/6" (4.23 mm): 72 steps 118" (3. 18 mm): 54 steps 1/9" (2.82 mm): 48 steps

Paper feed speed

1.7 IPS (Micro step mode) 6.0 IPS (Middle speed mode) 9.9 IPS (High speed mode)

MOTOR

main board driver board

Figure 2-22. Paper Feed Motor Drive Modes

MOTOR

main board driver board

Figure 2-22. Paper Feed Motor Drive Modes

2.3.9 Platen Gap Motor Control/Drive Circuit

Figure 2-23 shows a block diagram of the PG motor control/drive circuit.

The PG motor is a PM type pulse motor driven with 2-2 phase excitation, and can be rotated in either the forward or reverse direction and stopped at any position. The phase signals output from two pins are expanded by the predrive circuit, output from four pins, then transmitted to the driver board. The hold/run signal (PG H/R, which is the common voltage PGCOM switching signal) is output from the E05AI 6GA.

The drive voltage is a constant 36.5 VDC from the VP3 line.

The PG motor is controlled in accordance with the signal from the PG sensor. The A-phase output pulse (GAPA) from the platen gap sensor is input to port IN4 of the E05A16GA.

The B-phase output pulse (GAPB) is input to IN3. The CPU counts these pulses using an internal counter, and determines the amount and direction of the motor rotation. Therefore, the distance the PG motor moves can be obtained from the PG sensor signal.

Table 2-22. PG Motor Control/Drive Circuit Specifications

PG Motor

Supply voltage

36.5 ± 1 VDC (voltage applied to the driver circuit)

Current consumption (per phase)

0.2 A (driving, average) 0.02 A ± 5 mA (holding)

Drive frequency

285 PPS

Driving method

Unipolar constant voltage drive, 2-2 phase excitation

PG Sensor

Supply voltage

5 VDC± 5% (voltage applied to the driver circuit)

output

Rectangular waveform, 2 channels, TTL level

PG MOTOR

PG SENSOR

PG MOTOR

PG SENSOR

E05A16GA

MAIN BOARD DRIVER BOARD

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