When the spot-machining tool reaches the hole bottom, the Z-axis will firstly srop moving until the spindle makes D3 revolutions, and then return to the original position at the rapid feedrate.

• 在点加工刀具碰到孔底后，Z轴会先停止运动，直到主轴旋转了D3圈后，才会以快速进给速率返回到原始位置。