| 摘要 |
In a CNC lathe, a workpiece in the form of a longitudinally extending bar 12 is rotated about a longitudinal axis 14 and a cutter 16 is moved initially in the direction of arrow A and along a path, indicated in broken lines at 18, to machine the bar 12. The lathe runs unmanned, so any breakage of the cutter 16 results in scrap and possibly damage. To prevent this, a fixed sensor 20 is positioned, along the path 18, at a point where the CNC system brings the cutter 16 to rest. The sensor 20 comprises a probe 24 connected to a microswitch 22 in turn connected to the start control of the lathe. The process cycle restarts only if the cutter 16 engages the probe 24 to indicate that it is not broken.
|
