| 摘要 |
A stop mechanism for controlling the advance of a saddle of a screwcutting lathe comprises a cam mounted on a shaft operatively connected to a drive transmitting member. The cam has a ramped portion and is contacted by a pressure roller. When the saddle reaches a predetermined position along the lathe bed the cam is rotated causing the roller to contact the ramped portion and effect an abrupt further rotation of the cam. Rotation of the shaft during the abrupt rotation of the cam causes disengagement of the drive transmitting member from the drive of the saddle.
|
