SWT-256M micro stepper motor DC motor controller for permanent
magnet stepper motor and hybrid motor
SWT-256M is a high-performance subdivided stepper motor driver
designed by our factory using advanced pure sinusoidal precision
current control technology. The pure sinusoidal precision current
control technology adopted by SWT-256M can improve the above
problems well, so that the running effect of the stepping motor is
close to the servo level to some extent.
This drive also has multiple subdivisions, small size, multiple
protections and automatic semi-flow functions. Users can use
SWT-256M voltage up to 40VDC.
Second, the wiring instructions
1.P1 weak wiring signal description
PUL+(+5V) Pulse signal: pulse control signal, the rising edge of
the pulse is valid at this time; P-5 is 4-5V at high level and
0-0.5V at low level for reliable response, the pulse width is
greater than 1μS. If +12V or +24V is used, string resistor current
limiting is required.
DIR+ (+5V) direction signal: high/low level signal, in order to
ensure reliable response of the motor, corresponding to the forward
and reverse of the motor. The direction signal should be
established at least 5μs before the pulse signal. The initial
running direction of the motor is related to the wiring of the
motor. Interchanging any phase winding (such as A+, A-exchange) can
change the direction of the initial running of the motor. When
DIR-high level 4 -5V, 0-0.5V at low level.
ENA+(+5V) Enable signal: This input signal is used to
enable/disable, high level enable, and the driver does not work
when low level. Under normal circumstances, you must not connect,
so that it is suspended and automatically enabled.
2.P2 strong interface description
GND DC power ground
+V DC power supply is positive, any value between +30V-+40V can be
used, but the recommended value is +36VDC.
A+, A- Motor A phase. A+, A-intermodulation, can change the
direction of motor running.
B+, B- Motor B phase. B+, B-intermodulation, can change the
direction of motor running.
Product Detail Presentation
Current, subdivision DIP switch setting
Working (dynamic) current setting
Subdivision accuracy is set by SW5-SW8 four-position dial switch
Steps / circle
(1) What is a stepper motor and a stepper drive?Driver FAQ User Answers (Q&A)
Stepper motor is a special motor specially designed for precise
control of speed and position. Its rotation is operated step by
step at a fixed angle (called "step angle"), so it is called
stepper motor. Its characteristic is that there is no accumulated
error, every pulse signal sent from the controller is received, and
the motor runs at a fixed angle under the drive of the driver, so
it is widely used in various open-loop control.
The stepping driver is a power amplifier that can operate the
stepping motor. It can convert the pulse signal sent by the
controller into the power signal of the stepping motor. The speed
of the motor is proportional to the pulse frequency, so the control
pulse frequency can be precisely adjusted. Speed, the number of
control pulses can be accurately positioned.
(2) What is the breakdown of the drive?
The stepper motor is determined by its own unique structure, and
the “inherent step angle of the motor” (such as 1.2°/0.6°) is
indicated at the factory. However, in many precision control and
occasions, the angle of the whole step is too large, affecting the
control precision, and the
vibration is too large. Therefore, it is required to complete the
inherent step angle of a motor in many steps. This is called a
subdivision drive and can realize this function. The electronic
device is called a subdivision driver.
(3) What are the advantages of subdivision drivers?
Because the step angle that has passed each step is reduced, the
step uniformity is improved, so the control accuracy can be
The vibration of the motor can be greatly reduced. The
low-frequency oscillation is an inherent characteristic of the
stepper motor. Subdivision is the best way to eliminate it.
It can effectively reduce torque ripple and increase output torque.
These advantages are generally recognized by users and bring them
benefits, so it is recommended that you use subdivision drivers.
(4) Why does my motor only work in one direction?
- The possible direction signal is too weak, or the wiring polarity
is wrong, or the signal voltage is too high to burn out the
direction current limiting resistor.
The pulse mode does not match, the signal is pulse/direction, the
driver must be set to this mode; if the signal is CW/CCW (double
pulse mode), the driver must also be in this mode, otherwise the
motor will only run in one direction.