Patent ID: 7690844

Claim:
An apparatus, including: a first housing releasably coupled to a first moveable component of a medical guidance system, the guidance system having a target, and wherein movement of the first moveable component affects the target position; a first stepable motor coupled to the first housing; a first driving component coupled to the first stepable motor and capable of engaging the first moveable component, the first driving component moving the first moveable component when the first stepable motor is stepped and the first driving component engages the first moveable component; a second housing releasably coupled to a second moveable component of the medical guidance system, wherein movement of the second moveable component affects the target position; a second stepable motor coupled to the second housing; and a second driving component coupled to the second stepable motor and capable of engaging the second moveable component, the second driving component moving the second moveable component when the second stepable motor is stepped and the second driving component engages the second moveable component.