Patent ID: 8714064
Filing Date: 2014-05-06
Classification: B23D,G02B,Y10T

Abstract:
1. A compass saw comprising: a saw blade driven to reciprocate; and an observation device including (i) a sensor unit having only one sensor that is aligned with a workpiece side observation area and a working line to be followed, (ii) at least one detection surface covering a working area of the working tool, (iii) an optical system that is upstream of the sensor unit and includes a lens system having lenses of different focal lengths, wherein the observation device has the sensor unit aligned with a plurality of observation fields including at least the detection surface and a probing surface, wherein the lens system includes a first lens having a first beam path aligned at the detection surface and a second lens having a second beam path aligned at the probing surface and wherein the probing surface is upstream of the detection surface in a direction of the working line.