Issue:

JESR, Number 1, Volume XX

Section:

Issue Nr. 1 - Volume 20(2014)

Abstract:

Friction represents one of the major sources of disturbing forces which affect the functioning of the kinematic feed chains from CNC machine tools. Its influence reflects on the positioning precision values, having a negative impact on the table movement and leading to stationary errors, stick-slip motion and trajectory errors. The present paper presents an experimental analysis regarding the influence of the friction forces which appear in the linear rolling guideways on the positioning precision of kinematic feed chains. The rolling guideways present the advantages of a good behavior in terms of axis stability at low speeds and also for achieving high positioning speeds. Concerning the friction coefficient values, rolling and hydrostatic guideways are most suitable for the construction of high speed and high precision kinematic feed chains; in these cases, the friction coefficient has small values, which maintain quasi-constant against the feed rate.

Keywords:

kinematic feed chain, rolling guideways, friction force, positioning precision.

Code [ID]:

JESR201401V20S01A0005 [0004032]

Full paper:

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