Microstep resolution easily settable through jumpers: full-step, 1/2, 1/4, 1/8, 1/16, 1/32, 1/128 and 1/256 of step Simple step and direction control interfaceĪdjustable current control through a potentiometer to set the ref. Unlike market solutions, the ST820 helps customers truly take advantage of high-microstepping solutions. The hardware is fully compatible for RAMPS or other similar FFF 3D printing platform, representing a quick alternative to similar solutions. A compact solution for stepper motor drives with minimal external equipment, no additional components required. 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.The ST820 is an easy-to-use driver board for 3D printers, routers and more. 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. 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. 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°. A stepper motor rotates with a fixed step angle, just like the second hand of a clock.
0 kommentar(er)
