Numerically-controlled machine tool range control device

The utility model discloses a journey control device for a numerical control machine tool used for controlling running journey of the worktable of the numerical control machine tool. The journey control device comprises a photoelectric journey switch, an optical signal sensing point-block, a programmable logical controller PLC, a medium relay, a low-voltage power supply and a signal line. In operation, the small-sized optical signal sensing block moves with the worktable. After the optical signal sensing block blocks the photoelectric switch, a photoelectric approaching switch is turned on to produce corresponding electrical signals, which are output via the medium relay to the programmable logical controller PLC; after receiving the electrical signals, the programmable logical controller PLC executes a preset command to control the operation of the worktable.