MOONS' stepper motion control products are among the best in the industry. Our stepper motors product line includes Hybrid Stepper Motors, Permanent Magnet Stepper Motors, and Closed Loop Stepper Motors (Step-Servo motors). MOONS' stepper motors products range from the smallest φ8mm series with 0.06 ounce-inches of holding torque, to the largest NEMA42 series, with up to 4500 ounce-inches of holding torque. Our customers can choose from a variety of stepper motor sizes, phases, and step angles. Additionally, we can modify the motor's lead wires and connectors for proper fit and alignment, as well as modify the motor shafts with gears or pulleys. Additionally, we can also add value-added components such as gearboxes, encoders, dampers, or even custom electronics to the motor.
Hybrid stepper motors provide excellent performance in areas of torque, speed, and step resolution. Typically, step angles for a hybrid stepper motor range from 200 to 400 steps per revolution. MOONS' stepper motors include standard hybrid stepper motors, PowerPlus hybrid stepper motors and high precision hybrid stepper motors and smooth hybrid stepper motors.
AM series hybrid stepping motors are mainly used in the industrial automation industry. They match the performance of MOONS' stepper drivers and they are the recommended stepper motor type for MOONS' stepper drivers.
Step-Servo motors are specifically designed to be paired with Step-Servo drives to create motor and drive combinations that outperform traditional step motor systems.
Why choose MOONS' stepper motors?
These step motors from MOONS' include a number of improvements for even greater performance and value:
Many refinements that increase torque by an average of 20%
Complete range of sizes: 8, 10, 11, 14, 16, 17, 23, 24, 34, 42
Size 17 and larger 2 phase motors are UL recognized
0.9 degree 2 phase motors, and 3 phase motors for extra smooth, quiet, performance
PowerPlus technology: for maximum efficiency and performance at all speeds
Lower inertia rotors provide faster acceleration
High voltage insulation for use with high voltage, high performance drives
Low loss stators have better high speed performance
Standard windings with high fill for more torque
Updated model numbering system includes a wider range of windings and standard options
MOONS' provides motors to meet the needs of many applications. Common modifications include:
Corrosion resistant motors. These are often used in outdoor equipment where humidity and temperature changes can cause corrosion.
Sealed motors to keep out dust and water
Special shaft sizes and features
Pulleys, gears and couplings mounted on the shaft
Encoders and other feedback devices
Special lead lengths or cables, with many different connectors
Press Fit Pulley & Gear
Cross Drilled Shaft
What is a stepper motor?
Stepper motor or step motor or stepping motor provide precise position and speed control, without the need for feedback devices to sense position. The operation of step motors is controlled through electrical pulses that the drive converts to current flowing through the windings of the motor. As the current is switched the motor rotates in precise steps of a fixed angle. The motor and drive constitutes a low cost control system that is precise and simple to construct.
A stepper motor is a brushless DC electric motor that divides a full rotation into a number of equal steps. The motor's position can then be commanded to move and hold at one of these steps without any position sensor for feedback (an open-loop controller), as long as the motor is carefully sized to the application in respect to torque and speed.
Stepper motors, with their ability to produce high torque at a low speed while minimizing vibration, are ideal for applications requiring quick positioning over a short distance. Stepping technology allows for the use of an open-loop controller – simplifying machine design and lowering total cost compared to a servo motor system.
Basic structure of stepper motor
The applications of stepper motors
Applications MOONS' stepping motors are widely used to create the motion needed in many types of equipment. Examples include:
telecommunication: phase shift, Tuning, mobile antenna positioning
security: camera movement
automotive: fuel metering, steering control
What is the operating principle of a stepper motor?
In response to each individual control pulse and direction signal,the drive applies power to the motor windings to cause the rotor to take a step forward, a step in reverse, or hold in position. Forexample, in a 1.8 degree two phase step motor: When both phases are energized with DC current, the motor will stop rotating and hold in position. The maximum torque the motor can hold in place with rated DC current, is the rated holding torque. If the current in one phase is reversed, the motor will move 1 step (1.8 degrees) in a known direction.
If the current in the other phase had been reversed, the motor would move 1 step (1.8 degrees) in the other direction. As current is reversed in each phase in sequence, the motor continues to step in the desired direction. These steps are very accurate. For a 1.8 degree step motor, there are exactly 200 steps in one revolution. Two phase stepping motors are furnished with two types of windings: bipolar or unipolar. In a bipolar motor there is one winding on each phase. The motor moves in steps as the current in each winding is reversed. This requires a drive with eight electronic switches. In a unipolar motor there are two windings on each phase. The two windings on each phase are connected in opposite directions. Phase current is reversed by turning on alternate windings on the same phase. This requires a drive with only four electronic switches. Bipolar operation typically provides 40% more holding torque than unipolar, because 100% of the winding is energized in the bipolar arrangement.
2 phase step motor with bipolar driver
2 phase step motor with unipolar driver
What are the features of a stepper motor?
Precise Positioning Control
A stepper motor rotates with a fixed step angle, just like the second hand of a clock. This angle is called "basic step angle." MOONS' offers several types of "basic step angle" as standard motors: 2-phase stepping motors with a basic step angle of 0.9° and 1.8° and 3-phase stepping motors with a basic step angle of 1.2°. Besides the standard motor, MOONS' also has stepper motors avalible with other "basic step angle." They are 0.72°, 1.5°, 3.6° and 3.75°, these motors are not listed in this catalogue, please contact MOONS' for details.
Easy Control with Pulse Signals
A system configuration for high accuracy positioning is shown below. The rotation angle and speed of the stepping motor can be controlled accurately using pulse signals from the controller.
What is a Pulse Signal?
A pulse signal is an electrical signal whose voltage level changes repeatedly between ON and OFF. Each ON/OFF cycle is counted as one pulse. A command with one pulse causes the motor output shaft to turn by one step. The signal levels corresponding to voltage ON and OFF conditions are referred to as "H" and "L," respectively.
The length of Rotation is Proportional to the Number of Pulses
The length of rotation of the stepping motor is proportional to the number of pulse signal (pulse number) given to the driver. The relationship of the stepper motor's rotation (rotation angle of the motor output shaft) and pulse number is expressed as follows:
The Speed is Proportional to the Pulse Frequency
The speed of the stepper motor is proportional to the frequency of pulse signals given to the driver. The relationship of the pulse frequency [Hz] and motor speed [r/min] is expressed as follows:
Generating High Torque with a Compact Size
Stepper motors generate high torque with a compact size. These features give them excellent acceleration and response, which in turn makes these motors well-suited for torque-demanding applications where the motor must be started and stopped frequently. To meet the need for greater torque at low speed, MOONS' also has geared motors option.
Frequent Starting/Stopping is Possible
Speed VS Torque Characteristics comparetion between servo and stepper with same motor size.
The Motor Holds Itself at a Stopped Position
Stepper motor has full torque at stand-still as long as the windings are energized. This means that the motor can be held at a stopped position without using a mechanical brake.
Once the power is cut off, the self-holding torque of the motor is lost and the motor can no longer be held at the stopped position in vertical operations or when an external force is applied. In lift and similar applications, an electromagnetic brake type motor is required.
The Step-Servo is an innovative revolution for the world of stepping motor, it enhances the stepping motor with servo technology to create a product with exceptional feature and broad capability. The Step-Servo greatly improves the performance to be much more Intelligent, Efficient, Compact, Accurate, Fast and Smooth.