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Stepper Motor Drivers
AC Input Stepper Motor Drivers
AC Input stepper motor drivers offer superior torque characteristics over a wide speed range, from low to high speeds, providing a large speed ratio. Supports Closed Loop control without gain tuning or hunting problems when used with the AlphaStep AZ Series (absolute mechanical encoder) motor or the AlphaStep AR Series (built-in resolver) motor for superior control. The RKII Series (open loop) is ideal for demanding applications where feedback is not required.
All AC Input stepper motor drivers feature Oriental Motor's advance microstepping (Smooth Drive) control. These drivers are available in pulse input or stored data (Network) types through our FLEX product group and offer electromagnetic brake control for vertical operations.
Utilize the AlphaStep Closed Loop drivers on all our Actuator based products as a common platform to simplify wiring, improve machine performance and Networking.
- Pulse Input, Pulse Input with RS-485 Communications, Stored Data (Network), EtherNet/IP™, EtherCAT or PROFINET Compatible Types
- Single-Phase or Three-Phase Input
- Closed Loop or Open Loop
DC Input Stepper Motor Drivers
Available in a wide range of DC voltages, our DC stepper motor drivers are available with the same features found in our popular AC Input drivers.
In addition, we offer DC Input drivers specifically designed for OEM applications. The CVD board level is a superior microstepping driver providing an industry leading speed torque characteristic, high accuracy even when microstepping and ultra low vibration characteristics with its advanced microstepping (smooth drive) feature. Available in 2-phase or 5-phase.
Utilize the Closed Loop drivers on all our Actuator based products as a common platform to simplify wiring, improve machine performance and Networking.
- OEM (Board / card type) or Box type
- Pulse Input, Pulse Input with RS-485 Communications, Stored Data with RS-485 Communications, EtherNet/IP™, EtherCAT, PROFINET Compatible Types or Multi-Axis* types
- AlphaStep Closed Loop, 2-Phase and 5-Phase Stepper Motors
- 24 VDC, 48 VDC or 75 VDC Input
Types of Stepper Motor Drivers
Drivers that operate in the pulse input mode and built-in controller mode are available. You can select a desired combination according to the required operation system.
Pulse Input Drivers
The stepper motor can be controlled using a pulse generator provided by the user. Operation data is input to the pulse generator beforehand. The user then selects the operation data on the host programmable controller, then inputs the operation command.
Built-in Controller (Stored Data or Stored Program) Type Drivers
The built-in pulse generation function allows the motor to be driven via a directly connected personal computer or programmable controller. Since no separate pulse generator is required, drivers of this type save space and simplify wiring.
Difference Between AC Input and DC Input Characteristics
A stepper motor is driven by a DC voltage applied through a driver. In Oriental Motor's 24 VDC input motor and driver systems, 24 VDC is applied to the motor. In the 100-115 VAC motor and driver systems, the input is rectified to DC and then approximately 140 VDC is applied to the motor (certain products are exceptions to this.)
This difference in voltage applied to the motors appears as a difference in torque characteristics at high speeds. This is due to the fact that the higher the applied voltage is, the faster the current rise through the motor windings will be, facilitating the application of rated current at higher speeds. Thus, the AC input motor and driver system has superior torque characteristics over a wide speed range, from low to high speeds, offering a large speed ratio.
It is recommended that AC input motor and driver systems, which are compatible over a wider range of operating conditions than DC input systems, be considered for your application.
Stepper Motor Product Comparison
Product Series |
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Features |
Closed Loop, |
Closed Loop, |
High Torque, |
High-Efficiency |
High Torque, |
Basic Step Angle |
0.36° |
0.36° |
1.8°, 0.9° |
0.72° |
0.72°, 0.36° |
Driver Power Input |
AC or DC |
AC or DC |
DC |
AC |
DC |
Frame Sizes |
0.79 in. (20 mm) |
1.10 in. (28 mm) |
0.79 in. (20 mm) |
1.65 in. (42 mm) |
0.79 in. (20 mm) |
Available Options |
Geared Type |
Geared Type |
Geared Type |
Geared Type |
Geared Type |
Max. Holding Torque |
2.8 oz-in up to 752 lb-in |
42 oz-in up to 320 lb-in |
2.8 oz-in up to 84 lb-in |
19.8 oz-in up to 460 lb-in |
3.2 oz-in up to 70 lb-in |
0.02 N·m up to 85 N·m |
0.3 N·m up to 37 N·m |
0.02 N·m up to 9.5 N·m |
0.14 N·m up to 52 N·m |
0.0231 N·m up to 8 N·m |
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Learn More |
- Hybrid Stepper Motors and AlphaStep Hybrid Control Systems
- Everything You Need to Know about Stepper Motors
- 2-Phase vs. 5-Phase Stepper Motors
- Overcoming Rotation Vibration
- Development of the AlphaStep Battery-Free, Multi-Rotation Absolute Mechanical Encoder
- Speed-Torque Curves of Stepper Motors
- Stepper Motor Lower Loss Technology Development
- IP Ratings - Degree of Protection
- Motor Sizing Calculations