Title: Error Estimation to Linear Interpolation Cutter Path of Machining Center due to Acceleration/Deceleration Motions between Two Interpolation Segments(Machine Elements, Design and Manufacturing)
Abstract: This paper proposes a practical approach to estimating the path errors produced by the NC acceleration/deceleration motions around connection points between every two segments for a linear interpolation cutter path of a machining center. The approach consists of two parts. The first is an experimental method to identify the value of each related parameter in NC appareture to the acceleration/deceleration motion control, in which only an operation is needed to measure a few simple motion trajectories with two linear segments with the machining center. The other part is a concise and efficient simulation algorithm based on the identification results for a cutter path composed of a number of short linear segments. A comparison result of the simulated cutter path trajectories with the measured ones and contours of machined work pieces sufficiently demonstrates the effectiveness and reliability of the proposed approach. Therefore, as a useful tool, the approach is applicable to beforehand estimating the influence of the NC acceleration/deceleration motions on cutter path accuracy or judging the cutting conditions for the machining purpose without performing an actual machining test with the machining center.