Chapter 3:
Sure
Step
TM
STP-DRV-4035 Microstepping Drive
Sure
Step
TM
Stepping Systems User Manual
3–6
5th Ed., Rev. B 01/2019
Eight Lead Motors
Eight lead motors can also be connected in two ways: series or parallel. Series
operation gives you more torque at low speeds and less torque at high speeds.
When using series connection, the motor should be operated at 30% less than the
rated current to prevent over heating. Parallel operation allows a greater torque at
high speed. When using parallel connection, the current can be increased by 30%
above rated current. Care should be taken in either case to assure the motor is not
being overheated. The wiring diagrams for eight lead motors are shown below.
Note: Be aware that step motor wire lead colors vary from one manufacturer to another.
Connecting the Power Supply
The STP-PWR-3204 power supply from
a
utomation
D
irect
is the best choice to
power the step motor drive. If you need information about choosing a different
power supply, please read the section titled “Choosing a Power Supply” in Chapter
7: “SureStep System Power Supplies”.
If your power supply does not have a fuse on the output or some kind of short circuit
current limiting feature you need to put a 4 amp fast acting fuse between the drive
and power supply. Install the fuse on the + power supply lead.
Connect the motor power supply “+” terminal to the driver terminal labeled “+
VDC”. Connect power supply “-” to the drive terminal labeled “VDC-”. Use no
smaller than 18 gauge wire.
Be careful not to reverse the wires.
Reverse connection
will destroy your drive and void the warranty.
A+
A–
B+
B–
8
lead
motor
8 Leads Series Connected
Orange
Org/Wht
Blk/Wht
Black
Red
Red/
Wht
Yel/
Wht
Yellow
8 Leads Parallel Connected
A+
A–
B+
B–
8
lead
motor
Orange
Org/
Wht
Blk/
Wht
Black
Red
Red/
Wht
Yel/
Wht
Yellow
VD
C
Step Motor
Power Supply
12 - 42 VDC
+
–
Fuse *
+–
* External fuse not required when using an
STP-PWR-3204 P/S; fuse is internal.
Do NOT use STP-PWR-48xx or -70xx power supplies with an STP-DRV-4035 drive,
because those power supplies exceed the voltage limit of this drive.
