Abstract: The multi-reference mark encoder is used widely in metrology measurement and autocontrol as angle measuring device.The principle and coding mode of multi-reference mark encoder were introduced with an encoder of HEIDENHAIN company as on example. A research on a new auto home control method was taken based on the characteristics of multi-reference marks encoder. This method was used to collect and analyze the test data for a certain rotary table.The control method was proved reliably and accurately in test.

Key words: Multi-Reference marks encoder, Auto home