Screw auto-detection and selection device

A screw auto-detection and selection device comprising:

• a rotary machine table for moving screws through a plurality of detecting units around the rotary machine table;
• then, a material removing means being used to remove undesired screws;
• the qualified screws being collected in the collector by a material collecting means;
• a light source generating unit firmly secured at the rotary machine table for providing back light in camera detection;
• a recording control unit for recording the position of each screw being detected;
• the detecting result of each screw passing through each detecting unit being recorded so as to determined qualified screws and unqualified screws;
• a camera detecting unit being installed at an edge of the rotary machine table for measuring the length of the screw and determining the thread pitch;
• then the detecting result being sent to the recording control unit;
• a time scale cam unit for driving all the detecting units for measuring and determination;
• characterized in that:
• the camera detecting unit includes a press means, an ejecting means and a second camera detector;
• the press means has a press arm extending above the notch of the dispatching disk and an elastic press installed at a predetermined position of the press arm;
• an ejecting means has an ejecting pin and a movement limiting unit for ejecting a screw pressed by the press arm so that the screw is aligned to a radiating hole of the light source generating unit.