Patent ID: 8035913

Claim:
A parking ramp for a hard disk drive (HDD) comprising a VCM coil adapted to move the actuator over a disk within the HDD, the parking ramp comprising: a guide portion having an inclined surface adapted to receive a lift tab associated with an actuator mounting a read/write head during an unloading/parking operation, and a parking surface adapted to accommodation the lift tab at the completion of the unloading/parking operation; an installation support portion fixed in the HDD and adapted to support the guide portion; a vertically adjustable driving device provided between the guide portion and the installation support portion and adapted to position the guide portion at a first vertical height relative to the installation support and a second vertical height greater than the first vertical height, wherein the driving device vertically expands from an original state when an operating voltage is applied and vertically contracts back to the original state when the operating voltage is no longer applied; and a voice coil detection portion connected to the VCM coil and adapted to detect a voltage or current associated with a back EMF of the VCM coil.