AUTOMATIC DIMENSION INSPECTING INSTRUMENT

PURPOSE:To enable an inspection reference to be easily reset in accordance with a work and also the dimensions of a surface configuration to be inspected by moving a plurality of detectors for detecting contacts with the surface of the work via a slider while monitoring the quantity of the movement of the detectors. CONSTITUTION:When a slider 5 approaches a work 1 from above by the rotation of a pulse motor 6, probes 9-13 slidably mounted in a vertical direction are sequentially brought into contact with the work 1 and contacts with electrodes 15-19 are released, respectively. Thus, contact detection signals 26-30 are taken into a comparing arithmetic circuit 21 via a signal input interface circuit 20. The trailing time points of the signals 26-30 represent contact time points with the work 1. When the contact time points are compared with the feeding quantity of the slider 5, namely, a driving pulse 46 from a driving circuit 25 to the motor 6, height dimensions in the contact positions of the probes 9-13 can be obtained. Then, by operating 21 whether the height dimensions exist between the upper and lower limit dimension data of the work 1 stored in a storage circuit 22 by operating an operating circuit 23, whether a defective or a nondefective the work 1 is can be discriminated.