| 摘要 |
PURPOSE:To control an azimuth in a simple way within a range which causes no practical difficulty by shifting a magnetic head in the direction rectangular to the radius direction of a magnetic sheet. CONSTITUTION:A magnetic head 46 having a tilt angle thetaa preadjusted within a prescribed allowance range is attached to a head carriage 42 to perform the primary control. An azimuth shift can be controlled within a prescribed range by turning a control tool 86 and moving the head 46 in the direction (B) rectangular to the radius direction of the head 46. If the head 46 has an azimuth error alpha, the head 46 is shifted to a position B which is distant away from a position A of the most inner circumference track (radius Rmin) by a distance d(Rmin X tanalpha) with which the error alpha is substantially set at zero. The azimuth error is produced as the head 46 comes closer to the most outer circumference track (radius Rmax). Then the azimuth error (a) is maximum at a position C. In this case, a residual azimuth error (a) of the most outer track can be practically ignored in view of the mechanical working accuracy. |
