Digital Microstep Driver DM556N
9
(3). When using a regulated DC power supply, the output current of the power supply should be
greater than or equal to the operating current of the driver.
(4). In order to reduce costs, two or three drivers can share a power supply, but should ensure that
the power of the power supply is large enough.
5.2 Power Supply Recommend
(1). For DC power, it is recommended to use unregulated DC power supply
24VDC/36VDC/48VDC.
(2). For AC power, it is recommended to use transformer power 24VAC/36VAC.
6. Motor selection
It can be used to drive two-phase, four-phase hybrid stepper motors with an step angle of 1.8 degrees
and 0.9 degrees.
When selecting a motor, the torque and rated current of the motor are mainly considered parameters.
The torque is mainly determined by the size of the motor. The large-sized motor has a large torque;
the current is mainly related to the inductance, and the small-inductance motor has a high-speed
performance, but the current is large. The DM556N can drive Nema 23, Nema 24 two-phase and
four-phase hybrid stepper motors.
6.1 Motor matching
(1). Define the load torque, the ratio of the working speed range
]
2
/
1
/
)
a
[
2
rotation
2
1
a
J
D
M
i
J
C
T
（
load
the
of
inertia
of
Moment
：
J
load
the
of
on
accelerati
angular
Maximum
1
：
a
on
accelerati
angular
screw
or
on wheel
Transmissi
2
：
a
weight
Load
：
M
1.4
-
1.2
value
d
recommende
factor,
Safety
：
C
friction
of
t
Coefficien
：
efficiency
Rotation
：
diameter
disc
and
Screw
：
D
inertia
of
moment
screw
or
wheel
Rotating
rotation
：
J
ratio
Rotation
：
I
(2). Factors that determine the motor output torque:
For a given stepper motor and solution, the output torque has the following characteristics:
a. The larger the operating current of the motor, the greater the output torque, but the more copper
loss of the motor, the more heat the motor generates;
b. The higher the supply voltage of the driver, the higher the high speed torque of the motor;
c. According to the torque curve of the stepper motor, the high speed is smaller than the medium
and low speed torque.
