Disclosed are systems and methods for positioning a head. An exemplary
system includes a light source; a detector configured to receive signals
from the light source; a transducer that reads signals from a magnetic
tape; a plurality of structures coupled to the transducer and configured
to pass in opposition to the detector; a stepping motor; and circuitry
configured to determine whether or not a light signal is received by the
detector. If the light signal is received, the circuitry commands the
stepping motor to move the transducer incrementally in a first direction.
If the light signal is interrupted by moving the transducer within a
first distance, the circuitry commands the stepping motor to move the
transducer in a direction opposite the first direction until the light
signal has been continuously received across more than the first
distance. If the light signal is not interrupted by moving the transducer
within the first distance, continue to the circuitry commands the
stepping motor to move the transducer incrementally in a first direction
until the light signal is interrupted. If the first determining step
determines that the light signal is not received, the circuitry commands
the stepping motor to move the transducer incrementally in a direction
opposite the first direction.