| 摘要 |
PURPOSE:To improve working efficiency, by installing light source and light receiving element forming an optical axis between travelling spindle and fixed piece and an apparatus detecting existence of an object subject to be measured between travelling spindle and fixed piece by interruption of the optical axis. CONSTITUTION:The output signal of a dimension detector 28 detecting an external dimension of an object to be measured (not illustrated) held squeezed between travelling spindle and fixed spindle as that travelling with the travelling spindle is count-controlled by a counter-controlling circuit 60 for digital display on a display apparatus 50. Further, a detector 43 of the object to be measured detects interruption by the object of the optical axis, issues a travelling command to a motor driving circuit 65 from the main controlling circuit 58 and allows starting of measurement of the external dimension of the object to be measured. Further, an outside condition controlling circuit 63, controlling such outside conditions as temperature or source voltage, etc., removes influences of temperature or voltage, etc. affecting a display value. |
