“51”型圆度仪操纵手柄的结构特点是由一套杠杆系统控制齿轮箱内的活动齿轮的位置,因而可以产生两种测量速度:即每分钟三十转的对中心速度和每分钟三转的测量速度。此外还有一空档,即手动测量档。如果仪器在使用当中不注意而用力过猛会造成操纵手柄测量档的失灵,即每分钟三转的测量档不能工 The structural feature of the “51” roundness device joystick is that a set of lever systems control the position of the movable gears in the gearbox so that two measurement speeds can be produced: 30 centimeters per minute for center speed and three per minute Turn the measurement speed. In addition there is a gap, that is, manually measuring the file. If the instrument does not pay attention to the use of excessive force will cause the joystick measurement file failure, that is, the measurement file can not work three revolutions per minute