This difference in voltage applied to the motors appears as a difference in torque characteristics at high speeds.
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.) In Oriental Motor's 24 VDC input motor and driver systems, 24 VDC is applied to the motor. To meet the need for greater torque at low speed, Oriental Motor also has geared motors combining compact design and high torque.ĭifference Between AC Input and DC Input CharacteristicsĪ stepper motor is driven by a DC voltage applied through a driver. These features give them excellent acceleration and response, which in turn makes these motors well-suited for torque-demanding applications where the motor must start and stop frequently. Stepper motors generate high torque with a compact body.
Generating High Torque with a Compact Body
The relationship of the pulse speed and motor speed is expressed as follows: The speed of the stepper motor is proportional to the speed of pulse signals (pulse frequency) given to the driver. The Speed is Proportional to the Pulse Speed The relationship of the stepper motor's rotation (rotation angle of the motor output shaft) and pulse number is expressed as follows: The amount the stepper motor rotates is proportional to the number of pulse signals (pulse number) given to the driver. The Amount of Rotation is Proportional to the Number of Pulses The signal levels corresponding to voltage ON and OFF conditions are referred to as "H" and "L" respectively. A command with one pulse causes the motor output shaft to turn by one step. Each ON/OFF cycle is counted as one pulse. The rotation angle and speed of the stepper motor can be controlled with precise accuracy by using pulse signals from the controller.Ī pulse signal is an electrical signal whose voltage level changes repeatedly between ON and OFF. Toothed rotor cups are placed on each end of the magnet, and the cups are offset by half of a tooth pitch.Ī system configuration for high accuracy positioning is shown below. Both the stator and rotor are multi-toothed.Ī hybrid stepper motor has an axially magnetized rotor, meaning one end is magnetized as a north pole, and the other end a south pole. The rotor of a hybrid stepper motor is axially magnetized like a permanent magnet stepper motor, and the stator is electromagnetically energized like a variable reluctance stepper motor. Utilizing Hybrid Stepper Motor TechnologyĪ hybrid stepper motor is a combination of the variable reluctance and permanent magnet type motors. 5-Phase stepper motors offer 0.36° and 0.72°, while 2-Phase stepper motors offer 0.9° and 1.8° step angles. Oriental Motor offers stepper motors with a basic step angle of 0.36°, 0.72°, 0.9° and 1.8°.
The SmartPak also includes standalone control mode A-SCRIPT programs and a 2ndSight data port for Cloud Analytics.A stepper motor rotates with a fixed step angle, just like the second hand of a clock. Both kits feature real-time servo/closed loop control, easy BASIC programming control, a powerful built-in multi-thread processor, and a wizard for motion system tuning/autotuning. Nexus is a small, advanced controller that is simple yet intelligent, powerful, and intuitive. The key difference between the kits is the type of servo driver used – the PulsePak includes a Nexus pulse & direction driver, while the SmartPak features a Nexus all-in-one servo driver and controller.
Motors are available with a 1,000cpr or 2,500cpr encoder, and in NEMA sizes 8 through 34. Both kits are ideal for automation applications, including factory automation, lab automation, and semiconductor manufacturing.Įach kit contains a hybrid stepper motor with an integral encoder, servo controller, and cable kit to connect everything together. Nippon Pulse has introduced two new pre-packaged motion control solutions to help get stepper motor applications up and running fast: SmartPak and PulsePak motion controller kits.