1. High guiding precision the guiding precision refers to the accuracy of THK guide track, which is an important precision index of guide pair. The smaller the deviation between the actual trajectory of the moving part and the given direction, the higher the guiding accuracy.

影響導(dǎo)向精度的主要因素有:導(dǎo)軌承導(dǎo)面的幾何精度、導(dǎo)軌的結(jié)構(gòu)類型、導(dǎo)軌副的接觸精度和表面粗糙度;導(dǎo)軌和支承件的剛度;導(dǎo)軌的油膜厚度和油膜剛度;導(dǎo)軌和支承件的熱變形等。

The main factors affecting the guiding accuracy are: the geometric accuracy of the guide bearing surface, the structure type of the guide, the contact accuracy and surface roughness of the guide pair; the stiffness of the guide and the supporting parts; the oil film thickness and stiffness of the guide; the thermal deformation of the guide and the supporting parts, etc.

導(dǎo)軌的幾何精度一般包括導(dǎo)軌在垂直平面、水平平面內(nèi)的直線度和兩條導(dǎo)軌面間的平行度或兩導(dǎo)軌面間橫向某長(zhǎng)度的扭曲值，精度要求可以用導(dǎo)軌全長(zhǎng)上的誤差△或單位長(zhǎng)度上的誤差S表示。

The geometric accuracy of the guide rail generally includes the straightness of the guide rail in the vertical plane and the horizontal plane, the parallelism between the two guide rail surfaces or the transverse twist value of a certain length between the two guide rail surfaces. The accuracy requirements can be expressed by the error △ of the total length of the guide rail or the error s of the unit length.

2.移動(dòng)靈敏度和定位精度均高移動(dòng)靈敏度(移動(dòng)分辨率)指工件臺(tái)完成一次移動(dòng)能達(dá)到的短距離，定位精度指工件臺(tái)由運(yùn)動(dòng)狀態(tài)停止在某一指定點(diǎn)的能力。移動(dòng)靈敏度和定位精度與導(dǎo)軌的類型、摩擦特性、運(yùn)動(dòng)速度、傳動(dòng)剛度、移動(dòng)件質(zhì)量等因素有關(guān)。

2. The moving sensitivity and positioning accuracy are both high. The moving sensitivity (moving resolution) refers to the short distance that the worktable can achieve by completing a movement, and the positioning accuracy refers to the ability of the worktable to stop at a specified point from the moving state. The moving sensitivity and positioning accuracy are related to the type of guide rail, friction characteristics, moving speed, transmission stiffness, mass of moving parts and other factors.

3.具有低速運(yùn)動(dòng)的平穩(wěn)性低速運(yùn)動(dòng)的平穩(wěn)性，是指導(dǎo)軌在低速運(yùn)動(dòng)或微量移動(dòng)時(shí)不發(fā)生爬行等不連續(xù)運(yùn)動(dòng)的現(xiàn)象。它與導(dǎo)軌的結(jié)構(gòu)、導(dǎo)軌副材料匹配、潤(rùn)滑狀況、潤(rùn)滑劑性質(zhì)及導(dǎo)軌運(yùn)動(dòng)傳動(dòng)系統(tǒng)的剛度等因素有關(guān)。

3. It has the stability of low-speed movement. The stability of low-speed movement refers to the phenomenon that the guide rail does not crawl and other discontinuous movement when it moves at low speed or slightly. It is related to the structure of the guide rail, the material matching of the guide rail pair, the lubrication condition, the nature of the lubricant and the rigidity of the drive system of the guide rail.

4.剛度大導(dǎo)軌受力后的變形將影響部件之間的相對(duì)位置和導(dǎo)向精度。剛度對(duì)高精度機(jī)械和儀器尤為重要。

4. The deformation of rigid guide rail will affect the relative position and guiding accuracy of components. Stiffness is particularly important for high precision machinery and instruments.

5.抗振性好杭振性主要是指抗受迫振動(dòng)的能力和抗自激振動(dòng)的能力。對(duì)于閉環(huán)控制系統(tǒng)來說，不僅要求導(dǎo)軌對(duì)啟動(dòng)、制動(dòng)的跟蹤靈敏度高，還要求它要有適當(dāng)?shù)恼硿枘崽匦裕苑乐乖趩?dòng)、制動(dòng)過程中發(fā)生不穩(wěn)定現(xiàn)象。

5. Good vibration resistance. Vibration resistance mainly refers to the ability to resist forced vibration and self-excited vibration. For the closed-loop control system, not only the high tracking sensitivity of the guide rail to start and brake, but also the proper viscous damping characteristics are required to prevent instability in the process of start and brake.

6.發(fā)熱小在高速運(yùn)動(dòng)時(shí)，要求導(dǎo)軌的發(fā)熱小。

6. Small heating when moving at high speed, the heating of guide rail is required to be small.

7.結(jié)構(gòu)工藝性好在滿足設(shè)計(jì)要求的前提下，導(dǎo)軌應(yīng)盡量做到制造、維修、保養(yǎng)方便，成本低廉等。

7. The structure has good processability. On the premise of meeting the design requirements, the guide rail should be easy to manufacture, repair and maintain, and the cost is low.