MFM Output Signal Process

							                          MFM Output Signal Process


(Volts)

  +10                                           Pole N
              Pole N–1                                          Pole N+1
                         Pole N



     0




                                                  Pole N+1


   -10
          0               90         180           270       360    (Degrees)



                   Max. Flux Density per Pole            Raw Flux Density
                                   Effect on Magnetic Flux of
                          Air Gap and Magnetomotive Force Variations
                                            Magnetomotive Force–NI Variation (%)
                -10                         -5                      0             5                 10
               10



                                                 Reference (slope = -1)
                     5
Flux Variation (%)




                              -0.872

                             Reduction of Air Gap
                     0
                                                                              Increase of Air Gap


                          Reduction of NI                                                  -0.746
                     -5                           +0.886




            -10
              -10                           -5                      0             5                 10
                                                      Air Gap Variation (%)