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如图所示,“90°角仪”的主体是“90°角尺”,在角尺上固定有两组(或三组)测头4,其距离为100毫米(或50毫米)。量芯上之锥度为1∶50(或1∶25),两端之刻线间距为1毫米。当量芯在测套内每移动1格时,锥面便推动两侧销子移动0.01毫米(或0.02毫米)。当量芯在图示位置时,销子工作面和仪尺7两侧之工作面重合,此时“90°角仪”可按“90°角尺”一样使用。如需测量出其被测件的误差数值时,首先如用“90°角尺”一样,并保持仪座8工作面
As shown in the figure, the main body of the 90 ° goniometer is a “90 ° square” with two sets (or three sets) of probes 4 fixed at a distance of 100 mm (or 50 mm). The taper on the core is 1:50 (or 1:25) with a pitch of 1 mm on both ends. When the equivalent core moves one square in the sleeve, the cone will push the pins on both sides to move 0.01 mm (or 0.02 mm). When the equivalent core is in the position shown in the figure, the face of the pin coincides with the working face on both sides of the measuring stick 7, and the “90 degree angle meter” can be used in the same way as the “90 degree square”. If you want to measure the error value of the DUT, first use the “90 ° angle ruler”