Abstract: For the grinding control system of large and heavy castings, through the cooperation of industrial computer, force sensor, operating handle, HMI, ranging sensor and other components, a set of requirements and operation instructions on force sensing device, force closed-loop control function, position compensation, distance measuring device, position compensation function, inclined plane alignment and other functions are put forward, so as to ensure the safe and stable operation of the grinding system It can be widely used in casting grinding industry.