Patent ID: 6401352
Filing Date: 2002-06-11
Classification: G01B

Abstract:
A linear measuring machine comprising:a base; a column mounted on the base; a first slider movable vertically along the column and having a probe to be in contact with a workpiece; a displacement sensor for detecting height position of the first slider; a second slider provided on the first slider, the second slider being movable in the same direction as a moving direction of the first slider; a constant-pressure mechanism for holding the first slider against the second slider, the constant-pressure mechanism moving the second slider relative to the first slider when a more than predetermined load is applied between the sliders and returning the first slider and the second slider to a rest position when the load is released; a drive mechanism connected to the second slider for vertically moving the second slider along the column; and a switch being actuated when the second slider moves relative to the first slider to capture a detection value of the displacement sensor; wherein an allowable relative movement amount of the first slider and the second slider is not less than 3 mm, and wherein the switch is actuated to capture the detection value of the displacement sensor when the first slider and the second slider relatively move not less than 3 mm.