PRINCIPLES OF OPERATION
REV.-A
2.3.4.2 Carriage Motor Specifications
Specifications for the carriage motor are as follows:
Type
Drive Voltage
Coil Resistance
Current
4-phase, 48-pole stepper motor
24 V ± 10%
36 ohms ± 7% at 77° F (25° C)
Maximum 0.34 A (rush current)
Driving:
0.3 A (typical) (triple speed, 24 V)
0.23 A (typical) (double speed, 1.5 speed, normal speed, 24 V)
Holding: 0.05 A ± 20%
2.3.4.3 Carriage Drive Circuit Block Description
Figure 2-43 shows a block diagram of the carriage motor drive circuit. In this circuit, phase switching for
the carriage motor is not directly executed by the CPU, but by the gate array (7A) using pulses from the
CPU. SLA7020M is utilized to drive the carriage motor, using a stabilized current.
Figure 2-43. Carriage Drive Circuit Block Diagram
2-36
LQ-510
Содержание AP-4000
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