Transmit Motor Control Circuit - Panasonic UF-585 Service Manual

6.2.7

Transmit Motor Control Circuit

The transmit motor is a PM type, two-phase bi-polar motor. The stepping signal and chopping current control signals (pTAPH,
pTBPH, pTA10, pTA11, pTB10 and pTB11) are sent to the chopper drive circuit, comprised of IC26, IC27 (UF-585: IC9, IC10) and
its peripheral circuitry, from IC2 PEGASUS (Panasonic Engine for Graphic Adaptation System Under the SH: DZAC000157) output
port. The motor is powered by +24 VDC and is driven by a 1/2-phase excitation, and greater step division is provided by controlling
the phase circuit in steps (micro-step control).
PEGASUS
IC2
+24V
Motor
Driver
IC26
(IC9)
+24V
Motor
Driver
IC27
(IC10)
Tx Motor Driver Circuit Block Diagram
R25
R26
UF-595 (UF-585)
System Description
Tx Stepper
Motor
207