Sanyo ECR-238 - 34. General Report

16. DESCRIPTION OF PRINTER
1.1 OVERVIEW
1.1.1 SPECIFICATIONS
The Model-405R Digital Printer is developed and
designed for use with ECR.
1. Print method Print wheel selection
2. Carriage width 13 columns
3. Character positions 12 characters
4. Print speed typ. 3.2 lines/sec. (Ips)
5. Character selection Trigger magnet
6. Character size 1.6mm(W) x 2.8mm(H)
7. Paper free future The paper can be pulled
straight out towards you.
8. Paper
Type : Roll paper (plain paper)
Width : 57.5 + 0.5mm
Roll : diameter 80 mm or less
Thickness : 0.06~0.085 mm
Weight : 47 to 64 g/m?
(equivalent to 40-55 kg /
1000 sheets/1091 x 788
mm)
9. Ribbon
Type : Purple, nylon ribbon
Service part code : 632 250 3397
10. Motor
Suspension of the motor in standby status
as well as activating and stopping the motor
are performed by controlling the ON/OFF
status of the motor's power supply.
Terminal Voltage: 17V + 7%
Typical current: 0.15A or less (17V, 25°C)
11. Character selective magnets (unit)
Quantity : 12 selective magnets
Terminal Voltage : 17 VDC (+ 2.5V/— 1.5V)
(the motor and character selective magnet
coils shall use the same power source)
DC resistance: 250 + 25 Q (at 25°C)
Charge : From the front edge of Timing
signal Tn to front edge of Tn + 1
12. Timing detector
The timing detector consists of aLED anda
photo IC. It generates Timing signals (TO to
T12) corresponding to each of the 12
ON/OFF
@ Timing signals a a
ay Bai
13.
14.
15.
16.
characters on the printwheel as well as the
Timing signal Ts which determines the
position where the power supply to the
motor is cut off.
Voltage : 5to15V
Typical current : 30 mA (typ.)
(when the total circuit
current is 5 V at 25°C)
Guaranteed operating temperature : O°C to 50°C
Reliability MCBF 1,000,000 lines
External dimensions
100.8(W) x 125.3(D) x 54(H) mm
Weight Approx. 500 gm
1.1.2 PRINTER OPERATION
The printer operation during one print cycle is as
follows. (refer to belows figure)
@
@
Upon receipt of a Print command, the motor is
supplied with power and begins rotating.
The motor's rotation also causes the printing
wheels to rotate, and the timing detector
generates Timing signals which correspond to
the characters on the printing wheels.
The Timing signals are counted. When columns
(print wheels) that will be printed with a character
are detected, charging the character selective
magnets for the pertinent columns will
mechanically set the characters to their print
positions. For any column that does not require
printing, not charging its character selective
magnet will cause a“blank” section of the printing
wheel to be set at the print position.
When character selection for all printing wheel is
completed, the platen over the printing wheel to
print one line.
Before printing, the ribbon is automatically fed by
the cam gear. After printing, the page is
automatically fed by the paper feeding gear train.
The printing wheel are returned to standby
position by the selective gear, selective
transmission gear, and intermittent gear. During
the return phase of the printing wheel, the timing
detector generates Timing signal TS to cut off the
power supply to the motor, thereby completing
one print cycle.
(Mechanical Timing Chart)
ry
ae et
@@® Motor power | | . _
TO TH 12 13 TA TS TE 7 TR TS 110 TH TI2 TS (To)
-—
@ Character selective | ® |
magnet No. n
Print operation
o
Ribbon
feeding
@® Ribbon feeding and
paper feeding
operations
One print cycle CHAPTER 2
Normal paper feeding
—~29-