Stepper motors are popular for their ability to position accurately as well as their ease of use. Both the amount of rotation and the speed are controlled easily with the same digital square wave pulse signal. Unlike servo motors, stepper motors do not need an encoder to operate. Example applications of stepper motors are CNC machines, index tables, robotics, scanners, and more recently, 3D printers.
There are a variety of stepper motors available in the market. The most popular type of motor is the hybrid type, which includes the permanent magnet from the permanent magnet type, and the tooth construction from the variable reluctance type. There are 2-phase, 5-phase, and high resolution designs. Motors can also be pre-assembled with additional options for different purposes. For example, there are motors with an electromagnetic brake, encoder, or gearhead.
- Performing quick indexing operations over short distances
- Achieving high-speed reciprocating motion
- Performing indexing operations of a large inertial load
- Performing indexing operations with a higher stop accuracy
- Performing vertical positioning operation with power-off braking
- Performing closed-loop positioning operation
- Positioning within a small space
|Application: Performing quick indexing operations over short distances|
|Recommended: High torque 2-phase stepper motors|
that deliver high torque at low speeds are suitable for applications such as indexing operations over short distances that require high acceleration and deceleration rates. Stop accuracy of stepper motors is +/-3 arc min or (+/-0.05°). The small error does not accumulate from step to step.
PKP Series 2-Phase Stepper Motor
|Application: Achieving a high-speed reciprocating motion with less vibration|
|Recommended: High torque 5-phase stepper motors|
with an improved high speed winding design are suitable for applications that require fast reciprocating motions. Vibration is considerably lower than 2-phae stepper motors, and Oriental Motor's dedicated microstepping drivers do not affect the stop accuracy of 5-phase motors.
PKP Series 5-Phase Stepper Motor
Since the basic step angle is small at 0.72° (0.36° for high-resolution type), the vibration and noise are lower than 2-phase stepper motors with a basic step angle of 1.8°.
|Application: Performing indexing operations of large inertial loads|
|Recommended: Geared stepper motors|
A can rotate much higher inertial loads because of its ability to generate high torque and reduce the inertia ratio between the load and the motor. Larger inertia ratios can cause overshooting and undershooting during starting and stopping, which can add missed steps or increase settling time. Our spur gears offers improved torque and backlash characteristics. Many more gear types are available for low or no backlash, such as planetary and harmonic gears.
PKP Series Geared Type Stepper Motor
For space-saving machine designs, a geared type motor can drive heavier loads while keeping the motor frame size compact.
|Application: Performing indexing operations with higher stop accuracy|
|Recommended: High resolution type 2-phase stepper motors|
A has 100 rotor teeth instead of 50 rotor teeth. The increase in rotor teeth doubles the basic step resolution of standard motors from 200 to 400 steps per revolution and offers better stop accuracy (2 arc min or 0.034°).
PKP Series High Resolution Type Stepper Motor
|Application: Performing vertical positioning operation with power-off braking|
|Recommended: Electromagnetic brake type stepper motors|
An offers a built-in power-off-activated electromagnetic brake which provides frictional torque for holding a load in place vertically. When power is accidentally cut off due to a blackout or other unexpected events, the electromagnetic brake holds the load in position to prevent it from dropping or moving. With an electromagnetic brake, the motor current can also be turned off at standstill to suppress heat or lower power consumption.
PKP Series Electromagnetic Brake Type Stepper Motor
|Application: Performing closed-loop positioning operation|
|Recommended: Encoder type stepper motors|
An offers a pre-assembled compact encoder that provides a pulse signal for a host controller to track its position. For 2-phase stepper motors, encoders are offered at either 200 PPR or 400 PPR to match the motor's basic step resolution. Voltage (TTL) and line driver types are available with 3 channel output (A-phase, B-phase, and Z-phase).
PKP Series Encoder Type Stepper Motor
|Application: Positioning within a small space|
|Recommended: Flat type stepper motors|
A is a thin type of motor designed to fit into tight spaces. For applications such as index tables or small conveyors, flat type stepper motors can save space. Either a 42 mm frame size or a 60 mm frame size (including a harmonic gear type) is offered.
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