def METHOD_NAME(self, reestimateSlope=True):
    self.TargetPos = self.posFcn() #just use the vertical deflection for now
    if (not 'SlopeEst' in dir(self)) or reestimateSlope:
        self.DoSlopeEst()
    #fudge a previous correction to make our automatic slope correction work
    self.LastPos = self.TargetPos - self.SlopeEst
    self.LastStep = 1.0
    self.Tracking = True
    self.Errors = []
    self.PiezoPoss = []
    self.slopeEsts = []