The geometric accuracy, the motion precision and positioning accuracy and the demand is higher precision guide (such as numerical control machine tool and measuring machine of the guide), in the design should follow some principles are as follows:

Error compensation principle, satisfy the following three requirements, in order to make guide rail system error compensation for each other:

(1) guide must be set between elastic link , such as plastic roller (piece of) or fluid film, etc.

(2) between guide rail to have enough preloaded force, to contact error compensation.

(3) the guide rail manufacturing error should be less than middle elastomer (units) deformation.

Precision non-interference principle manufacturing and use the accuracy of guide rail affection to each to get to higher precision. Such as: rectangular guide of straight sex and side of guide rail line in manufacturing of affection to each other; Flat-V guide the change of lateral size combination guide will not affect guide work precision.

Without these instruments in the occasions, the operator can hold round rods or wrench and tools of the most close to bearing conflict machine shell parts, will be ashamed to tools listening ears by the tools of sound from running bearings, and of course use medical stethoscope modification can also.

Normal fag running bearings shall be uniform sound, steady not harsh voice, not the normal fag running bearings is sound with various kinds of intermittent, impact or harsh sound. First have to get used to the normal running bearings sound, then can hold judgment is not normal running bearings of sound, and then through the practice of the accumulation of experience, and further analysis of what not corresponding to the normal voice what kind of bearing not normal phenomenon. Bearing not normal voice categories many, but difficult to talk, mainly depending on the accumulation of experience.

Still, the static friction factor close to design principles guide rail pair should make guide surface when moving, as close as static friction factor, so as to get high and low speed stability repositioning precision, rolling guide, with plastic board or post with the plastic covering common sliding guide rail, friction factor and static, frictional factor small close to.

Guide rail pair automatic for the principle that guide with high precision, must make guide rail pair have automatic for the characteristics of close. Level can rely on motion guide the weight of components to post close; Other guide must be additional pressure roller spring force or the post box.

Full contact principle of guide rail fixed length must ensure that move in the biggest travel guide two limit position, and fixed length guide rail contact (no more than the fixed guide) in order to ensure that the process of guide rail pair in contact always full contact.

Compensating force deformation and thermal deformation principle and its supporting a guide bearing force or temperature changes, design and its supporting a guide rail, try to make it become the shape of the requirements after deformation. Such as machine beam gantry guide rail, will be made in the convex, to compensate for spindle box (or knife) caused by the weight of the bending deformation.



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