| 摘要 |
<p>A surface sensor unit and method therefore for controlling the penetration depth of a cutting tool of a numerically controlled machine and a method for controlling the penetration depth of a cutting tool of a numerically controlled machine are described. The surface sensor unit comprises: a substantially cylindrical collar extending around at least part of the cutting tool, said collar being axially movable with respect to the axis of rotation of the cutting tool; an electronic sensor secured to a non-rotatable housing of the numerically controlled machine, said sensor being capable of communicating or having a communication device connected thereto, said sensor being situated adjacent the collar and axially rearward thereof; restraining means for preventing an axially rearward end of the collar from touching an axially forward end of the electronic sensor when the collar is not being subjected to a force acting in a rearward axial direction; and depth control means for pre-positioning of the collar relative to the cutting tool in the axial direction.</p> |
