Patent ID: 6937409

Claim:
A method of adjusting a wrap angle in magnetic tape systems comprising the steps of: for each magnetic tape system, operating the magnetic tape system with a magnetic tape running over a first guide surface then toward a first side of a tape head assembly, then across a surface of the tape head assembly, then away from a second side of the tape head assembly and then over a second guide surface; monitoring a signal in the magnetic tape system derived from signals or noise generated in a read head as the magnetic tape runs across the surface of the tape head assembly; and finding a signal-dropout angle by decreasing a first wrap angle formed by the magnetic tape and surface of the tape head assembly until the signal abruptly ceases; and increasing the first wrap angle to a selected value; and rotating the first shaft to a first selected posit ion prior to the step of operating the tape system, wherein the step of increasing the first wrap angle to a selected value further includes rotating a first shaft having an offset portion on which the first guide is mounted to move the first guide in relation to the head assembly, wherein a selected first angle read from an angular scale marked on a circumference of an adjustment tool used to relate the first shaft.