Automatic anti-slipping system and automatic anti-slipping method for a turntable of a tire servicing machine

An automatic anti-slipping system for a rotationally fixed attachment of a rim of a wheel in a wheel service machine, comprises a wheel supporting and rotating means (20). At least two driving pins (32) are provided at the wheel supporting and rotating means (20) for reversibly generating a rotationally fixed connection between the wheel supporting and rotating means (20) and a rim of a wheel to be serviced, wherein at least one of the at least two driving pins (32) is adapted to come in a positive locking engagement with at least one recess of a rim when coinciding with said recess of a rim by reversibly moving said pins in a direction parallel to the rotary axis of the wheel supporting and rotating with actuator means (40).