| 摘要 |
PURPOSE:To obtain the feed speed of a tool feeding apparatus always synchronized with the number of revolution of a main shaft by continuously detecting the constant revolution angle of the main shaft by a revolution angle detector. CONSTITUTION:The pulse signals T outputted at each constant revolution angle of a main shaft and the pulses F outputted from a pulse oscillation apparatus 37 are input into a count apparatus 39 by a photosensor 13 installed onto a main shaft. The number N of pulses F contained in the time T necessary for the constant revolution angle of the main shaft is counted. Said number N is obtained for each constant revolution angle of the main shaft, and the ratio Nm-1/Nm in comparison with the preceding value is calculated in a main-shaft revolution-speed reduction-rate calculating apparatus 41, and the frequency of the pulses for driving a tool feeding apparatus 35 is reduced in proportion to the ratio Nm-1/Nm in a tool feeding speed controller 43. Thus, the tool feeding apparatus is transferred in synchronization with the revolution of the main shaft. |
