–5–
2-2.
Overview
The mechanism is run by the following three types of motors:
the “COMPL, MOTOR CAM
(6A000)
”, the “ASSY, MOTOR
STEPPING
(4K000)
”, and the “COMPL, HOUSING REEL T
(2E000)
”.
These motors are controlled by the CPU, which detects the
position of each movement by means of head position sensor
(Cam Sensor MC-1), ribbon encode sensor (Reel Sensor MC-
2), ribbon top sensor
(MC-3)
, paper top sensor
(MC-4)
, and
paper exit sensor
(MC-5)
, as explained in the “Circuit Move-
ment Details.”
2-3. Cam Drive
The cams (“CAM, MECHANISM L:
5K000
”; “CAM, MECHA-
NISM R:
5L000
”) are run by the “COMPL, MOTOR CAM
(6A000)
” through the following set mechanism modes: Standby
Paper exit
Paper/Ribbon advance
Pa-
per-supply
.
Chart 1 provides the Cam Drive related timing chart.
- The angle of revolution of the cam is detected by the
“COMPL PWB, MC-1” upper head position sensor (cam
sensor). The mechanism mode position is detected based
on the combined power output signals of S1, S2, and S3.
- The pressure and release of the head (“COMPL, HOLDER
TPH:
1A000
”).
- The setting of the paper guide (“COMPL, GUIDE, PAPER:
5I000
”), and the play of the head (“COMPL, HOLDER TPH:
1A000
”) when under pressure.
- The pressure and release of the non-paper-exit pinch rollers
(“COMPL, HOLDER, PINCH SIDE:
5A000
”, “COMPL,
HOLDER, PINCH PICK:
5D000
”, and “COMPL, HOLDER,
PINCH EXIT F:
5E000
”)
- The pressure and release of the paper-exit pinch roller
(“COMPL, HOLDER, PINCH EXIT:
5B000
”).
- The release and connection of the paper-supply gear
(“GEAR, RELAY PICK UP:
6K000
”).
- The locking and release of the S reel brake (“SLIDE, LEVER
TPH:
5M000
”).
Note 1: The Cam I.D. symbols are the numbers etched into
the “CAM,MECHANISM L
(5K000)
”.
Note 2: The code in letters and numbers in parentheses
indicate identifying Loc. No. in the Parts Price List.
Chart 1
Mode
Cam Symbol
Standby
Paper Exit
Paper/Ribbon Advance Paper Supply
Head Position
Sensor
(Cam sensor)
output
(Photoelectric
current
present: L)
(MC-1)
S1
S2
S3
Head Position
(1A000)
released
pressured
released
pressured
released
pressured
Head Pressure
(1A000)
fixed
play
Paper Guide
(5I000)
Non-paper-exit
Pinch Rollers
(5A000, 5D000,
5E000)
Paper-exit Pinch
Roller
(5B000)
released
in contact
released
locked
Paper-Supply
Gear
(6K000)
S Reel Brake
(5M000)