Linear guide rail accuracy grades are divided into (walking parallelism, the following takes the guide rail 100mm length as an example), ordinary grade (no mark/C) 5μm, high grade (H) 3μm, precision grade (P) 2μm, ultra-precision grade (SP) 1.5 μm, ultra-super precision (UP) 1μm
1 According to the purpose of different machinery. Give the slider preload. Generally, pre-compression is divided into no pre-compression, medium pre-compression, and heavy pre-compression. The greater the preload, the better the rigidity.
Load: Generally, at the beginning of model selection, 1/3 of the rated dynamic load is determined as the upper limit of the actual load. Therefore, it is generally added to the medium preload to ensure that there is no sinking. If the guide rail is used up and down, the guide rail directly plays a guiding role. How much the sliding block rises is related to the screw or other transmission mode used, and has nothing to do with the slide rail and the sliding block.
2 There are basically three types of different brands. Generally, the gap, light preloading, and medium preloading have a larger gap that can affect the walking accuracy, load carrying capacity and rigidity of the linear guide. Moreover, choosing a linear guide with clearance can reduce the vibration and impact caused by reciprocating motion to a certain extent.
3. When the load is loaded, the slider will not sink much. The exact statement should be elastic deformation. If you want to say how much, there is currently no label in any linear guide data, because it can be ignored.
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