Considerations For An Actuator of 4 Feet Or Less

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Factors To Consider When Choosing An Actuator of Four Feet Or Less
Whether for packaging, life sciences, office equipment or factory automation, smooth motion, fast accelerations and a high degree of accuracy are hallmark requirements for linear movement actuators. Increasingly, miniaturization has added the additional requirement of compactness. One system that can meet all of the above requirements in its conversion of motor torque to linear thrust is the single axis ball screw actuator. Ball screws convert rotary motion to linear motion, or torque to thrust, and vice versa. The ball screw actuator is a combination of a ball screw on which, to eliminate backlash, a slide block or nut’s movement is guided by recirculating steel balls that roll between the block and raceways of guide rails.
What Are The Advantages Of A System Solution?

Traditionally, many equipment manufacturers designed and assembled their own, custom, ball screw actuators. In fact, many semi-conductor manufacturers and medical equipment manufacturers still do. To design custom stages, engineers have to design the ball screw size, i.e., find the right ball screw, carriage and guide rails – the three main components. They’d also have to have supports for the ball screw on both ends and motor brackets. After mounting all the components adjustments have to be made – repeatedly.

Many companies have recognized the advantages of purchasing an off-the-shelf system solution as opposed to taking components and building their own system. Typically, ball screw actuator systems come in at least 5 different stage sizes. They have several travel length options and there are other options already designed. Once the engineer identifies the optimum system, he or she just has to get the right motor.

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