Linear Guide Systems from Tallman Robotics are being tested and will be transported to UK.
Linear modules usually have synchronous belt and ball screw modules according to different driving modes, while ball screw linear modules have semi closed modules and fully closed modules according to the requirements of application environment. These two modules can be used in various active chemical production industries, but what is the difference between the two modules? Today, let’s take a closer look at the difference between semi closed linear modules and fully closed linear modules.
We need to know that the module ball screw drive has the same positioning accuracy, but different structures. Generally, semi closed linear modules are more widely used, such as TK series linear modules, so the load can be selected relatively more.
With all closed modules, steel belt cover plates are used, and the built-in guide rails can effectively remove dust, which can be used in special environments, such as DMS series linear module products.
Let’s elaborate on their differences in three ways:
1. Different use environments
The semi closed Linear Guide Systems is mainly used in the working environment with less dust. In the dust environment, the semi closed Linear Guide Systems is used. The dust enters and sticks to the screw. If it is not completed on time, it will affect the work of the screw, but if it often needs to open it, it is a waste of time. Therefore, the fully closed linear module is generally used in the dusty environment;
2.Structure of different modules
The fully enclosed linear module is that the driving part is enclosed inside to avoid dust falling on the driving part; And both sides of the semi closed linear module are provided with openings, the openings are movable seats, and the use of transmission components can be seen through the openings;
3.Different use costs
The price of fully closed linear module of Linear Guide Systemsis a little higher than that of semi closed linear module, and the materials used are different. Semi closed is a concave contour, which is equivalent to opening a slot in the mouth. The assembly of fully closed module is much more difficult than that of semi closed linear module, which directly leads to higher cost.
The differences between semi closed linear modules and fully closed linear modules in three aspects also greatly affect our choice of them. If the travel and load are determined, the use of semi enclosed modules will be more sensitive and the price will be favorable. Usually we have more options and fewer fully enclosed module types. However, if dust-proof performance is required, all closed in-line modules must be used.
Here, let’s learn more about linear modules.
The flatness of the equipment is unqualified
In general, the flatness of the bottom surface of the equipment shall be less than 0.05mm/m. For precision Linear Guide Systems, the flatness of the bottom surface of the equipment shall be less than 0.02mm/m. If the flatness of the device does not meet the requirements, it will inevitably lead to the forced locking of the bottom surface of the linear module, resulting in the deformation of the bottom surface of the sliding table and the strong bending deformation of the linear guide rail and ball screw. Light will increase the working resistance of the linear module, heavy will lead to the risk of failure to work, affect the accuracy of use together, and greatly shorten the service life of the linear module.
Exceeding the maximum load
Any linear module product has its own maximum load, and the maximum load is also different according to different methods of equipment. Therefore, our Linear Guide Systems can transfer the load data with reference to the purchased products. If necessary, check the loading module, check the dynamic allowable torque change, the influence of acceleration and deceleration, cantilever length and other factors, and reserve sufficient safe operation coefficient.
The screw device is abnormal
The fixing screws at the bottom of the linear Guide Systems shall follow the principle of centering first and then locking at both ends in turn. If the two ends are locked first, and the arch deformation caused by deformation cannot be eliminated, the linear guide rail cannot work smoothly, so as to reduce the accuracy of walking parallelism and straightness.
Overvoltage damage and wiring failure of photoelectric switch
Limit switch and travel switch of photoelectric switch, photoelectric sensor. This sensor cannot share with motor driver or other reasonable load. Otherwise, the reverse electromotive force of motor or overload will make the voltage shake greatly, and then the photoelectric switch will be burned out. Photoelectric switches are generally used for inductive switches of linear modules. The reverse connection of the positive and negative polarity of the photoelectric switch will lead to the damage of the photoelectric switch. Therefore, when wiring, pay attention to the wiring drawing. The photoelectric switch belongs to the vulnerable part.
The cantilever of this device is too long
If the cantilever length of Linear Guide Systems is too large, the allowable torque overload of the guide rail will be formed, and the acceleration and deceleration time will change under different acceleration and deceleration speeds. The vibration Z generated during acceleration and deceleration is finally absorbed by the linear module, and the long-term use of vibration will shorten the service life of the guide rail.
Deformation of steel strip of fully enclosed module
For the built-in guide rail and dust-proof fully enclosed linear module, the flexible steel strip cannot be stressed. Manual bending will cause the deformation of the steel strip, affect the dust-proof effect and accelerate the damage. Generally, the cover plate cannot be pressed manually, and the deformation of the cover plate will produce friction, noise and aluminum chips with other parts. We must pay attention to these problems in the process of using and installing Linear Guide Systems. It is best to consult the manufacturer to determine whether the problem is correct. We hope these problems can help us realize the importance of using Linear Guide Systems correctly. If you have more questions, please contact our engineers and technicians directly.