Rev.D Product Overview Appendix D-5
TM-U675/U675P (with autocutter) Service Manual
Confidential
Printing operation when printing one character
This section explains the printing operation for a 9
✕
9 dot matrix.
Characters are printed by energizing the print solenoids at a timing corresponding to the head
carriage movement position, using the carriage motor phase change signal as a reference signal.
The print head unit moves approximately 0.339 mm with a one step rotation (7.5
°
) of the
carriage motor.
To print the number "2," print solenoid numbers 2 and 9 are energized in sync with the carriage
motor phase change signal. Next, print solenoid number 8 is energized in sync with TnH,
delayed by a half dot time interval. The number "2" is printed by repeating this process.
(See Figure D-7.)
Figure D-7
TnH Tn4(H)
Tn
Print solenoid 1
Carriage motor phase
switching timing
2
3
4
5
6
7
8
9
Tn+2 Tn+4
Tn+1 Tn+3 Tn+5
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