Precise linear motion solutions are growing in demand, and as an automation distributer, Myostat offers multiple motion control options to drive a system. Two of the most commonly used actuators include the ball screw actuator and the belt driven actuator. Although both assemblies convert rotary motion to linear motion, they do so in different ways. With multiple linear motion options available it is important to find the right actuator assembly for the design. Understanding the application will help determine which type of actuator is the right fit for the application.
Ball Screw Actuator:
Ball screw actuators have enclosed recirculating ball bearings that travel on a threaded shaft with a helical raceway. The ball bearing design is able to accommodate heavy loads and deliver precise positioning.
Ball bearings have low compressibility and allow ball screw actuators to be rigid, highly accurate and precise. They offer high thrust capabilities and, because of minimal rolling resistance of bearings, these mechanisms are typically over 90% efficient.
Ball screw actuators are the ideal mechanism for movement that requires smooth motion, efficiency, accuracy, and precision. To improve backlash and optimize the stiffness and wear characteristics for a given application the preload in the assembly can be adjusted.
Belt Driven Actuator:
Belt driven actuators are an excellent choice if a design requires speed and force. Using a grooved belt instead of a lead screw, these mechanisms are ideal for horizontal applications with the need for speed and longer strokes. With a toothed timing belt that runs between geared pulleys, the motor’s driving torque is converted into a tangential linear force; gearheads are sometimes used to increase the force output and load capabilities of belt drive systems.
Typically belt driven actuators are not utilized in vertical systems without a motor brake, as there is a risk of sending the load into free fall if there was a loss of power. Belt driven actuators are ideally suited for horizontal loads and make for the better choice for mechanisms require long strokes and high speeds.
Myostat Motion Control is committed to providing the solution that works for you. With quality options that vary in lifespan, speed, precision, and strokes, Myostat has an actuator drive for your application.