Star Micronics SP320S User Manual
Specifications and Main Features
- Model: SP320S Series Dot Matrix Printers
- Print Columns:
- 28 Columns: SP321S
- 40 Columns: SP322S
- 35 Columns: SP323S
- Power Supply Options:
- AC120V
- AC220V
- AC240V
- Interfaces:
- Serial Interface (RS-232C)
- Parallel Interface
- Mechanism Type:
- Sprocket Paper Feed
- Print Head:
- 9 needle wires
- Print Speed: Adjustable on the context of operations as needed
- Temperature Detection:
- Print head temperature detection function is included
- Maintenance Features:
- Includes guidelines for tool inspection and lubrication
- The dimensional, weight, and full technical specifications vary based on model configuration.
Frequently Asked Questions
- What is the printing technology used in the SP320S series?
- The SP320S series employs the dot matrix technology in printing.
- What are the printer supply voltages?
- The supply voltage choice includes AC120V, or both AC220V for printers, or specifically for the wider range AC240V.
- What is the connection interface of the printer?
- Part with respect to communication protocol, the printer can have an RS-232C Serial and Parallel interfaces depending on the model in question.
- What is the maximum number of print columns for the SP320S series?
- The SP322S model has 40 columns.
- Does the printer have a temperature detection feature?
Yes, there is a thermal protection circuit present in the printer to safeguard overheating of the printhead.
- Is there any specific maintenance required for the printer?
Yes, Cleaning on a routine basis and lubrication after 6 months or 1 million lines whichever is earlier is strongly recommended.
- Can the print speed be adjusted?
Yes, the speed in which the printer performs its tasks can be modified to maximize the user’s requirements.
- What am I supposed to do if the printer fails to work?
Local problems can be eliminated by examining ribbon connections, and foreign objects, and ensuring that the ribbon is properly set.
- Is it fine to use other makeng of ink ribbon with the printer?
In order to acquire consistent output performance, other makeng of the Ink Ribbon should be avoided as much as possible.
User Manual
DOT MATRIX PRINTER
SP320S SERIES
TECHNICAL MANUAL
[SECOND EDITION]
Chapter 1 General Specifications
Chapter 2 Theory of Operation
Chapter 3 Adjustments
Chapter 4 Parts Replacement
Chapter 5 Maintenance and Lubrication
Chapter 6 Parts List
• First edition: March 1993
• Second edition: March 1997
CONTENTS
1
2
3
4
5
NOTICE
• All rights reserved. Reproduction of any part of this manual in any form whatsoever, without
STAR’s express permission is forbidden.
• The contents of this manual are subject to change without notice.
• All efforts have been made to ensure the accuracy of the contents of this manual at the time of going
to press. However, should any errors be detected, STAR would greatly appreciate being informed
of them.
• The above notwithstanding, STAR can assume no responsibility for any errors in this manual.
6
© Copyright 1993 Star Micronics Co.,Ltd.
CHAPTER 1
GENERAL DESCRIPTION
GENERAL DESCRIPTION
1.1 General description............................................................................................1-1
1.2 Model name notation .........................................................................................1-1
1.3 Instructions apply models................................................................................. 1-2
1
1-3
GENERAL DESCRIPTION
1.1 General description
This manual describes the SP320S series dot matrix printers listed in section 1.3.
The manual includes sections on principles of operation, adjustments, part replacement, maintenance and lubrication
as well as a list of parts. This manual has been prepared for use by a maintenance staff carrying out regular inspections
or repairs when abnormalities occur. This manual has been prepared for maintenance staff operating in the field
and not for ordinary users.
1.2 Model name notation
SP3 2 1 S D 28 120
Voltage
120 : AC120V
220 : AC220V
240 : AC240V
No. of print columns
28 : 28 columns (SP321S ANK, at 12.2CPI)
40 : 40 columns (SP322S ANK, at 15.4CPI)
35 : 35 columns (SP323S ANK, at 15.3CPI)
Interface
D : Serial interface (RS-232C)
C : Parallel interface
Papaer feed
S : Sprocket
Mechanism
1 : 28 columns (ANK, at 12.2CPI)
2 : 40 columns (ANK, at 15.4CPI)
3 : 35 columns (ANK, at 15.3CPI)
Printer type
2 : MP320 Series
SP300 Series printer
1-1
GENERAL DESCRIPTION
1.3 Instructions apply models
Serial interface Parallel interface
SP321SD28-120 SP321SC28-120
SP321SD28-220 SP321SC28-220
SP321SD28-230 SP321SC28-230
SP321SD28-240 SP321SC28-240
SP322SD40-120 SP322SC40-120
SP322SD40-220 SP322SC40-220
SP322SD40-230 SP322SC40-230
SP322SD40-240 SP322SC40-240
SP323SD35-120 SP322SC35-120
SP323SD35-220 SP323SC35-220
SP323SD35-230 SP323SC35-230
SP323SD35-240 SP323SC35-240
1-2
THEORY OF OPERATION
2.4.2 Print Head Carriage Mechanism
This print head carriage mechanism consists mainly of the carriage, carriage motor, gear train, home position
detector, and timing detectors. When the carriage motor rotates, the drive shaft (cylindrical cam) is rotated by the
reduction gear. The print head supported by the carriage moves right and left. The print head position is determined
by timing signals generated by the timing detectors and the home position signal generated by the home position
detector.
Fig. 2-14 Print Head Carrying Mechanism
2-12
2-12
THEORY OF OPERATION
2.4.4 Ink Ribbon Feed Mechanism
The ink ribbon feed mechanism comprises of the ribbon cartridge, the carriage motor, and the gear train. The gear
train transmits the rotation of the carriage motor to the bevel gear. the ribbon is contained in the ribbon cartridge
and tied into an endless loop. When the bevel gear turns the ribbon feed roller, the ink ribbon sandwiched between the ribbon
feed roller and the ribbon pressure roller is wound up. The ribbon brake spring keeps slack out of the ribbon.
Fig. 2-17 Ribbon Feed Mechanism
2-132-15
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