AlphaStep SensorAS Series Closed Loop Stepping Motor and Driver with Built-in Controller

The AlphaStep with Built-in Controller offers closed loop control and high response moves with no hunting or gain tuning and features low vibration at low speeds. Using Oriental Motor's closed loop control, the AlphaStep with Built-in Controller uses a built-in feedback device that constantly monitors the motor shaft position to detect and correct for loss of synchronism even during abrupt load fluctuations and accelerations. 

When an overload condition is detected, the AlphaStep with Built in Controller will instantaneously regain control using the closed loop mode. When an overload condition continues, the AlphaStep with Built-in Controller will output an alarm signal, thereby providing reliability equal to that of a servo motor.

The built-in controller driver has an integrated controller which ensures a simple, efficient solution for stepping motor applications and is computer-programmable via an RS-232C connection.


Control Diagram

High ResponseHigh Response

Like conventional stepping motors, AlphaStep operates in synchronism with command pulses. This makes possible short stroke positioning in a short time.


 

No Gain TuningNo Gain Tuning

Gain tuning for servo motors is critical, troublesome and time-consuming. Since the AlphaStep operates like a stepping motor, there are no gain tuning requirements. AlphaStep is ideal for low rigidity applications, such as belt and pulley systems.


 

No HuntingNo Hunting

Since AlphaStep is a stepping motor, it has no hunting problem. Therefore, when it stops, its position is completely stable and does not fluctuate. AlphaStep is ideal for applications in which hunting would be a problem.


 

Low VibrationLow Vibration at Low Speed

The driver employs advanced technology that produces smoothness comparable to a microstep driver. Its vibration level is incredibly low, even when operating in the low speed range. When frequent changes from low to high (or vice versa) speed operations are required, the use of the Resolution Select Function solves the problem. AlphaStep provides resolution as high as 0.036° per step without any damping mechanism or other mechanical device.

Motor / Driver Connection with a Single Cable

AlphaStep only requires one cable for connection between the motor and the driver. Wiring is much simpler compared with conventional servo motors requiring two cables, one for motor and the other for encoder. The cable can be extended to a maximum of 20 m (65.6 ft.) [10 m (32.8 ft.) for flexible extension cable], so the motor and the driver can be installed in locations far apart.

Built-in Controller Features

Position Control

Four Operating Modes

Linked MotionLinked Motion

A maximum of four motion profiles may be linked.

Speed ChangeSpeed Change on the Fly

The running speed of the motor can be changed while the motor is in motion.

Daisy ChainDaisy Chain Capability

Up to 36 units can be daisy chained with unique device IDs.


Built-in Functions

Sample ProgramGeneral Inputs / Outputs

Communication

Program Memory


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