Operating Principles
Rev. A
2-27
2.3.9 PG (Platen Gap) Motor Driver Circuit
Since a PM-type stepping motor is used for the PG motor, the motor can
rotate in the both forward and backward direction and stop anywhere. The torque from the
PG motor moves the CR guide shaft to obtain the proper PG. (Refer to Section 2.1.3.) The
motor is driven by 2-2 phase. Signals for 4 phases (PGA, PGAN, PGB and PGBN) are
output from the gate array E05B46 via the transistor array SDC03-V1. To hold the motor, the
hold signal (PGI) is output from the same gate array. Then the transistors 2SC3859 (Q4)
and SHA03-V1 (Q3) are turned off to change the drive voltage from PBS (+35V) to the 5
VDC. See Table 2-18 for PG motor specification.
Table 2-18. PG Motor Specification
Motor type
4 phases/8-pole/PM-type stepping motor
Power supply voltage
35 VDC
6%
Coil resistance
250
18
Consumption current
(per 1 phase)
Rush: 0.2 A on the average
Hold:
0.02A
Drive frequency
350 pps
Drive mode
Constant current uni-polar drive
Excitation mode
Uni-polar constant voltage drive, 2-2 phase drive
Rotational direction
CW:
Widens the PG
CCW: Narrows the PG
PGA
PGAN
PGB
PGBN
PGI
VPB
+5V
PGCOM
PGA
PGB
PGC
PGD
Q4
Q3
Transistor Array
SDC03-V1
Gate Array
E05b46
Figure 2-21. PG Motor Drive Circuit Block Diagram
Summary of Contents for DLQ-3000+
Page 1: ...EPSON EPSON EPSON France S A SERVICE MANUAL DLQ 3000 PRODUIT ...
Page 2: ...EPSON 24 PIN DOT MATRIX PRINTER EPSON DLQ 3000 SERVICE MANUAL SEIKO EPSON CORPORATION 4008259 ...
Page 6: ...v REVISION SHEET Revision Issued Data Contents Rev A August 21 1997 First Release ...
Page 62: ...2 3 12 Other Sensor Circuits 2 30 ...
Page 160: ...Chapter 6 Maintenance 6 1 Maintenance 6 1 6 1 1 Lubrication and Adhesion 6 1 ...
Page 171: ...DLQ 3000 Rev A A 6 ...
Page 172: ...Appendix Rev A A 7 A 2 Circuit Diagrams Figure A 2 C210 MAIN Board Circuit Diagram 1 2 ...
Page 173: ...DLQ 3000 Rev A A 8 ...
Page 174: ...Appendix Rev A A 9 Figure A 3 C210 MAIN Board Circuit Diagram 2 2 ...
Page 175: ...DLQ 3000 Rev A A 10 ...
Page 177: ...DLQ 3000 Rev A A 12 Figure A 5 C124 PSB Board Circuit Diagram ...
Page 180: ...Appendix Rev A A 15 Figure A 8 C210 MAIN Board Component Layout 2 2 ...
Page 181: ...DLQ 3000 Rev A A 16 Figure A 9 C124 PSB Board Component Layout ...
Page 182: ...Appendix Rev A A 17 Figure A 10 C124 PSE Board Component Layout ...
Page 189: ...EPSON SEIKO EPSON CORPORATION ...
Page 254: ...PC 437 USA Europe standard Annexe A 27 ...
Page 255: ...PC 850 Multilingue PC 860 Portugais PC 863 Français canadien PC 865 Norvégien A 28 Annexe ...
Page 256: ...PC861 Islandais BRASCII Portugais brésilien Abicomp Portugais brésilien Annexe A 29 ...
Page 259: ...A 32 Annexe ...
Page 262: ...Utilisation du sommaire des commandes A 10 V Vitesse 2 25 W Windows Microsoft 1 17 18 Index 3 ...