Epson TM-U950 Technical Manual page 90

CONFIDENTIAL
Auto-cutter drive circuit
The auto-cutter drive circuit uses the dedicated DC motor drive IC TA8428K. The CPU issues
the AC_1 and AC_2 signals to control off, normal, reverse, and braking operations of the auto-
cutter motor.
AC_1
L
H
L
H
Carriage motor drive circuit
The carriage motor is driven by a dedicated constant-current IC. The CPU issues the mutual
switching signals CR_1 and CR_2 and the constant-current switching signals CR_HL and
CR_NM. In response to these signals, the IC controls the carriage motor via the OUTA, OUTA,
OUTB, and OUTB terminals.
CR_HL CR_NM Operation
0
0
1
Rev. A
AC_2 Operation
L Off
L Normal
H Reverse
H Brake
Figure 2-57. Auto-cutter Drive Circuit
0 Speed up / slow down
1 Normal rotation
0 Hold
TM-U950/U950P Technical Manual
Mechanism Configuration and Operating Principles 2-45