为防止工作中磁盘突然无磁,砂轮仍在旋转将二.件报废,造成人身和工作事故,我们利用光敏电阻,三极管,高敏继电器和可调电阻组成光电无磁保护装置。它能解决磁盘在无磁时能使砂轮自动伽仁运转,井能调节磁盘量大小,从而加工不同型号的套园1井能自动报警。 In order to prevent the work of the disk suddenly non-magnetic, the wheel is still rotating two pieces scrapped, resulting in personal and work accidents, we use photosensitive resistors, transistors, high-sensitivity relays and adjustable resistance photoelectric non-magnetic protection device. The utility model can solve the problem that when the magnetic disk is in a non-magnetic state, the grinding wheel can be automatically operated by a gamma ray and the volume of the magnetic disk can be adjusted;