57AHS140 Four Wires Dual Shaft 2 Phase Hybrid Stepper Motor
1. Products Overview
Step motor is an executive agency that converts electrical pulses
into corner displacement. You can control the angle displacement by
controlling the number of pulses to achieve the purpose of accurate
positioning. At the same time, you can control the speed and
acceleration of the motor rotation by controlling the pulse
frequency to achieve the purpose of the speed regulation.
The hybrid step motor is currently the most widely used step motor,
and everyone is familiar with the stepper motor. Here, we briefly
introduce how to choose the right step motor for our applications.
How to choose the right step motor for our applications?
The choice of stepping motor torque
The torque of the stepping motor is similar to the "power" of
traditional motors. Of course, there is an essential difference.
The physical structure of the stepping motor is completely
different from AC and DC motors and the output power can be
variable.
Generally, we select the motor size according to the torque need in
operation. For example, if the torque needed is less than 0.8N.M,
frame size 20/28/35/39/42mm stepper motors are suitable. If the
required torque is about 1N.M, select 57mm motor. When the required
torque is several N.M or even more, usually selected stepping
motors with frame size 86/110/130mm or bigger.
The stepping motor speed selection
Special consideration should be taken for the speed of the target
stepper motor. Because the output torque of the motor is inversely
proportional to the speed. That is to say, when the stepper motor
speed is low (500-600 rpm or lower speed per minute), its output
torque is larger. When the motor speed is increasing, the motor
toque will be decreasing and especially when with the speed of
1000rpm and above.
Sometimes when high-speed motors are needed, the coil resistance,
inductance and other indicators of the stepped motor must be
considered carefully. Choose a motor with a slightly less
inductance is better, as the output torque is normally higher.
However, if want low speed and big torque, a stepper motor with
inductance no less than 10mH is better.
Selection of no-load-starting frequency
This is a more important indicator for buying motors. If it is
required to start and stop frequently within a short time, and the
speed is about 1000 rpm (or higher), it is usually necessary to
"accelerated startup", i.e need a motor with high no-load-starting
frequency.
Phase selection
Regarding to the choice of the number of step motor phases, many
customers do not pay enough attention. In fact, the performance of
stepper motors with different phases are different. The more
phases, the smaller the steps can be done, and the vibration at
work is smaller. In most occasions, two-phase motors are enough.
However, if higher performances needed, especially for precision or
smoothness, 3-phase or 5-phase can be better.
Select the protection level
There are special step motors, such as water-proof and oil-proof,
dust-proof for some special occasions. For example, underwater
robots, or fountain etc. need waterproof motors.
Other special specifications
If u need special step motors, please contact us. Within the scope
of technical permission, we are happy to provide you with
customized services, including but not limited to, current, torque,
speed, hollow shaft, dual axis, coder, band, belt Brakes, etc.
Currently, stepper motors are widely used in the field of motion
control. Below is a brief introduction to several issues that need to be noted when use hybrid stepper motors.
The torque of the stepper motor will decrease as the speed
increases.
When the stepper motor rotates, the inductance of each phase
winding of the motor will form a reverse electromotive force. The
higher the speed, the greater the reverse electromotive force. In
this case, the phase current of the motor decreases with the
increase of frequency (or speed), resulting in a decrease in
torque.
The stepper motor can work well at low speeds, but if it exceeds a
certain speed, it may not start or there may be strong noise
whistling.
The stepper motor has a technical parameter: no-load starting
frequency, which is the pulse frequency at which the stepper motor
can start normally under no-load conditions. If the pulse frequency
is higher than this value, the motor cannot start normally and may
experience step loss or rotor blockage. With load, the starting
frequency should be lower. If the motor is to achieve high-speed
rotation, there should be an acceleration process in the pulse
frequency, that is to say the starting frequency should be lower,
and then a certain acceleration should be applied to reach the
desired high frequency (the motor speed should increase from low
speed to high speed).
How to overcome the vibration and noise of two-phase hybrid stepper
motors during low-speed operation?
The inherent drawbacks of stepper motors are high vibration and
noise during low-speed rotation, which can generally be overcome by
the following solutions:
A. If the stepper motor works exactly in the resonance zone,
mechanical transmission such as changing the reduction ratio can
avoid the resonance zone;
B. The most commonly used and convenient method is to use drivers
with subdivision functions;
C. Replace with a stepper motor with a smaller step angle, such as
a three-phase or five phase stepper motor.
The Applications of Kaifull PRMCAS Hybrid Stepper Motors
Machine tools and engraving machines
The application of stepper motors in machine tools is also very
common. In machine tools, stepper motors are used to control the
feed and tool retraction, thereby achieving precision and speed in
machining workpieces. It can achieve different processing effects,
high speed, and high efficiency.
Automation equipment
The application of stepper motors in automation equipment is also
very extensive. In automation equipment, stepper motors are used to
control the position and speed of various moving components,
thereby achieving automation control of the equipment. It can
achieve different control effects, such as high speed and high
stability.
Printing machines
Stepper motors are widely used in printers. In a printer, a stepper
motor is used to control the movement of the print head, thereby
achieving precise printing of text, images, and charts. It can
achieve different printing effects, such as high definition, high
speed, and high stability.
Automotive components
The application of stepper motors in automotive components is also
very common. In automotive components, stepper motors are used to
control the position and speed of car seats, rearview mirrors,
windows, and doors, thereby achieving automated control of
automotive components. It can achieve different control effects,
such as high speed and high reliability.
Optical equipment
In optical equipment, stepper motors are widely used in modulators,
fine-tuning, and other aspects. Because the action of stepper
motors is very slow and the stepper angle can be adjusted, they are
widely used in various optical positioning mechanisms, which can
provide higher stability and accuracy for optical equipment.
Medical devices
Stepper motors are widely used in medical devices, especially in
surgical instruments such as blades and cutters. The high-precision
positioning of stepper motors can significantly improve the
accuracy of surgery and make surgery safer. Stepper motors can also
be used in devices such as pacemakers and syringes.
Precision positioning applications
Stepper motors can complete precise positioning tasks through
quantitative motion and fixed step angles, which makes them widely
used in various precision positioning equipment, such as optical
equipment, textile equipment, computer embroidery machines, medical
equipment, automation equipment, etc. These equipment usually
require high-precision and stable positioning machinery, and
stepper motors are perfect for such tasks.
In summary, stepper motors can be widely used in various fields due
to their characteristics of quantitative motion and fixed stepper
angle, providing more precise and efficient driving force for
mechanical equipment to achieve higher production efficiency and
quality.
2. Hybrid Stepper Motor General Technical Specifications
| Step Angle | 1.8° (2 Phase) |
| Step Angle Accuracy | 0.09° |
| Shaft Type | Single shft, Dia. 6.35 or 8.0mm (Customizable) |
| Max. Temperature Rise | Less than 80 °C (Rated Current) |
| Max. Surface Temperatures | Max Allowed 100℃ |
| Ambient Temperature | -20 °C ~ +50 °C |
| Insulation Grade | 100 MΩ Min. , Class B |
| Dielectric Strengt | 500 VAC for 1 Minute |
| Max. Axial Load | 15N |
| Max. Radial Load | 90N (10mm from mounting Surface) |
| Certificates | Rohs, CE, CCC (As per Customer Need) |
3. Hybrid Stepper motor Performance Datasheet
| Model | Current A/Ø | Resistance Ω/Ø | Inductance mH/Ø | Holding Torque N.m | Rotor Inertia g.cm2 | Lead # of Leads | Weight kg | Length mm | Matching Drive |
| 57AHS140-4204D-55-6.35F | 4.2 | 0.4 | 1.3 | 1.4 | 245 | 4 | 0.71 | 54.5 | Y2SD2 |
4. Mechanical Dimensions (in mm)
5. Wiring Diagram
6. Torque Speed Curves
