MID-7604/7602 Stepper Power Motor Drive User Guide
20
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Stepper Motor Configurations
This section describes the various industry-standard winding configurations for stepper motors and
shows how to connect them to a MID-7604/7602. The MID-7604/7602 is compatible with all
configurations of two-phase stepper motors.
Note
The MID-7604/7602 is
not
compatible with five-lead unipolar stepper motors or five-phase
stepper motors.
Two-phase stepper motors come in 4-, 6-, and 8-wire variations. Figure 17 shows a 6-wire and an 8-wire
stepper motor. A 4-wire motor is the same as a 6-wire motor except that the center taps (CT) are not
brought out.
Figure 17.
6-Wire and 8-Wire Stepper Motors
For maximum flexibility, you can connect 8-wire stepper motors in either a series or parallel
configuration. Connecting the windings in a series, as shown in Figure 18, produces the most torque per
amp but has the disadvantage of higher inductance and poorer high-speed performance.
Figure 18.
Series Stepper Motor Wiring (Higher Torque, Lower Speed)
Ph
as
e A
Ph
as
e A-CT
Ph
as
e A-CT
Ph
as
e A
Ph
as
e B
Ph
as
e B-CT
Ph
as
e B-CT
Ph
as
e B
Ph
as
e A
Ph
as
e A-CT
Ph
as
e A-CT
Ph
as
e A
Ph
as
e B
Ph
as
e B-CT
Ph
as
e B-CT
Ph
as
e B
6-wire
8
-wire
1
2
3
4
5
Ph
as
e A
Ph
as
e B
Ph
as
e B
Ph
as
e A
Gro
u
nd
Motor C
as
e Gro
u
nd
S
hield
Ph
as
e A
Ph
as
e A-CT
Ph
as
e A-CT
Ph
as
e A
Ph
as
e B
Ph
as
e B-CT
Ph
as
e B-CT
Ph
as
e B
