| 摘要 |
PURPOSE:To enhance machining accuracy by positioning first and second spindles in respective delivery angle positions on the basis of a work delivery command, and delivering a work held by means of the first spindle to the second spindle. CONSTITUTION:Upon completing machining with respect to a work 36 held by means of a first spindle 3a, a main control unit 12 commands C-axis control units 21 and 22 receiving signals every predetermined rotary angle from transducers 3d and 5d on the basis of a delivery program stored in a memory 16 to position spindles 3a and 5a in delivery positions, that is, in such positions that a reference position separates from a C-axis origin by a predetermined angle in a C direction. After positioning the spindles 3a and 5a in the delivery positions by the effect of the drive of motors 3c and 5c, the unit 12 releases the chuck 5b of the second spindle 5a so as to move a spindle stock 5 onto a 3 side, fastens the chuck 5b while releases a chuck 3b, and delivers the work 36 to the second spindle 5a. This enables accurately machining together with C-axis control. |
