Patent ID: 6960758

Claim:
An encoder system comprising a timing disc and a circuit board with a U-shaped sensor/emitter unit and a plug-in connector, wherein: the circuit board with circuit components including the sensor/emitter unit and U-shaped connector is configured as an assembly unit that can be fastened to a flange end of an electric motor by at least one of a mechanical, thermal, and adhesive means of attachment; the timing disc is configured to be slipped onto a motor shaft at the flange end of the electric motor; the motor is configured for connection to a power source by means of contact elements; the circuit board has connections for the U-shaped sensor-emitter unit; the sensor-emitter unit is operable to receive position signals, embraces an edge portion of the timing disc, and is adjustable in all three spatial directions; the plug-in connector has connecting leads forming electrically conductive connections to said circuit components; said flange end of the electric motor faces the timing disc and is equipped with a centering collar which, in a plan view, is approximately circular but has a flattened portion on at least one side, said flattened portion together with an opposed edge of the centering collar presenting an insertion width (W) that is reduced relative to a circle diameter of the centering collar; the circuit board has a recess which receives the centering collar in a form-fitting way allowing the centering collar to be fixated in a defined position; and the recess is open towards a side of the circuit board, with a width (L) of the opening corresponding to said reduced insertion width (W) of the centering collar.