A Linear Slide Helps Get Desired Motion Control

Usually an object is capable of moving in three different directions, but with the help of a linear slide, it can move straight in a single direction. Basically, this linear mechanism helps control the other axes of the object. A linear motion is of use in industrial applications such as sorting, packaging, stamping, hammering, wrapping etc. This mechanism can be used in three ways—manually, by using a stepper motor or by using a DC motor in conjunction with an encoder.

Let's take a look at all the three ways of using a linear slide:

Manual method: This is used with a main knob that is connected to a lead screw. In this system, when the screw is rotated, the platform is pushed forward. In fields such as optics, this method is most suitable. In this, the linear stage can be mounted either horizontally or vertically by adjusting the base of the platform.

With a stepper motor: When automated position control is required, this kind of mechanism is best suited. In the manual method you have a knob, but in this system, in addition to the knob you have a stepper motor. Since there is a motor involved in this process, there is a greater amount of uniformity as the motor is programmed to move in fixed motion.

With a DC motor with encoder: In certain set ups, a DC motor can be used in place of a manual knob. However, while a stepper motor moves in fixed steps, a DC motor does not follow any such incremental steps in movement. Hence, it becomes rather important to use a method to determine the uniformity of the fixed steps. Mostly, a scale is attached on the internal mechanisms of a linear stage and an encoder is used to determine the position of the stage.

In certain cases, more than one linear set-up might be used together. This is done when the requirement is for linear movements in more than one direction. A linear slide is also sometimes referred to as a linear stage. A good linear movement system can help you gain effective motion control. Before making a purchase decision, it is advisable to surf the internet to learn about the most reputed manufacturers and suppliers of linear systems. Ideally, you should also look for a guarantee and warranty for such products. Having a good linear stage mechanism in your factory or work site will help you realize the true potential of motion control.

About the Author

PI is well known throughout the high-tech world as a leader in design and manufacture of motion control products, linear actuators, linear stage. piezo ceramics and nanoactuators, linear slide, microscope stage, hexapod 6DOF positioning systems, linear motor and micro robots.