Encoder apparatus and motion guide apparatus with encoder apparatus

An encoder apparatus comprising:

• a reference mark;
• and a head, wherein
• the reference mark includes a first scale coil, and a second scale coil electrically connected to the first scale coil,
• the head includes a transmitting coil configured to transmit an electromagnetic wave to the first scale coil in a non-contact manner, a receiving coil configured to receive the electromagnetic wave from the second scale coil in a non-contact manner, and an electric circuit configured to generate a pulse for generating an origin signal from the electromagnetic wave received by the receiving coil upon the transmitting coil facing the first scale coil and the receiving coil facing the second scale coil,
• the encoder apparatus further comprises an incremental magnetic scale,
• the head includes a magnetic sensor configured to read a magnetic field of the incremental magnetic scale, and
• the reference mark is placed on a top surface of the incremental scale in a stacked configuration.