Linear guide motors have many unique advantages over mechanical systems, such as very high and very low speeds, high acceleration, almost zero maintenance (no contact parts), high precision, and no backlash. The motor is required to complete linear motion without gears, couplings or pulleys, which is very meaningful for many applications, removing unnecessary parts that reduce performance and shorten mechanical life.
1. High Speed
Currently, the speed limit that the better linear rails on the market can withstand is 3.5 meters per second, and more are below 2 meters per second. Very few guide rails can adapt to a speed of 6 meters per second, but their life will not be too long.
Even so, in actual use, the speed of linear guide motors is far superior to that of screw rods, belts, gear racks and other transmission methods, not to mention that linear motors can achieve travel that these transmission methods cannot achieve.
2. High Precision
Usually, in terms of repeatability, the screw rod module is: ±0.005mm-±0.01mm, the belt module is: ±0.04mm, and the gear rack module is: ±0.1mm. Linear motors, coupled with scales, readers, sliders, guide rails, drivers and other accessories, are assembled into modules. The repeatability accuracy is generally: ±0.0025mm (magnetic scale) to ±0.0015mm (optical scale). Of course, this is the accuracy after basic configuration. If equipped with high-end air bearings and marble bases, the repeatability accuracy of linear guide motors can be recorded in nanometers.
3. Easy to Control
The control method of traditional transmission is relatively simple, and the movement is also very mechanical. The required instructions are also very thin and the editability is very poor. The control of linear guide motors is much more flexible. In addition to supporting various mainstream control modes and encoder feedback methods, most manufacturers' controllers can support secondary development.
Nine Advantages of Linear Guide Motors
4. Simple Structure
Linear guide motors include many forms, the most common ones are: iron core, ironless core, magnetic shaft, DD motor, voice coil motor, and their structures are very simple. In summary, they are: movers and stators. The benefits of a streamlined structure are not only easy to install and adjust, but more importantly, it is not easy to damage, and even if a fault occurs, it is easy to troubleshoot. In addition, the moving stator of the linear motor is non-contact, and there is a certain air gap between the moving stator and the stator, so they are free of wear, less likely to be damaged, and have a longer life.
5. Smooth and Stable Operation
The moving stator of the linear guide motor is contactless and frictionless, so the operation of the moving stator is very smooth and smooth. The iron core linear motor will have a certain cogging effect, but its smoothness and stability are far superior to the traditional transmission method, not to mention the iron coreless motor and magnetic shaft motor with zero cogging force.
6. The Stator Can Be Spliced
The stroke of the screw module is limited by the length of the screw and the guide rail, the belt module is limited by the belt and the motor output power, and the gear rack module is also limited by the power output. In short, their strokes are very limited. But the stroke of the linear guide motor is the magnetic suspension movement of the moving stator on the stator. As long as the magnetic force of the stator covers the place, it can be regarded as the stroke range of the moving stator. In theory, the stroke of the linear motor is infinite, just like the maglev train, it can be extended infinitely. In actual industrial design applications, stators can be spliced and extended, and guide rails can also be used. Therefore, the travel of linear motors can be said to be unlimited.
7. Support Multiple Movers
Linear guide motors can run multiple movers on the same set of stators at the same time. Each mover runs independently and is controlled by the host computer. This will greatly improve the working efficiency of automation equipment, which is also difficult for screw modules and belt modules to do. There is no comparability at all.
8. Fast Response and Improved Efficiency
Linear guide motors, like other transmissions, have an indicator to judge the time required from startup to maximum speed, which is usually understood as concepts such as response speed and acceleration. The higher the acceleration, the faster the response from static to maximum speed. This advantage opens up new scenarios for the application of linear motors, such as the aircraft catapult on an aircraft carrier, which utilizes the high acceleration characteristics of linear motors. The response speed of traditional transmissions is usually dozens to hundreds of times that of linear motors.
9. Lower Noise
Excessive noise is not only harmful to human health, but also affects the mood of workers and increases the chance of errors. The sound of linear guide motors is about 50-60 decibels, which can effectively reduce noise and improve the working environment.
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