Self-aligning roller group is to use roller stents placed a rotating mechanism to adjust the movement direction of the belt a institutions, self-aligning roller set above average for the taper roller drum, shape and form to drum the best effect. Attune slants roller group working principle is to use tape machine in the operation process of the opration bias belt speed changing, to adjust to turn to treat the rebalancing opration.And to achieve the objuctive tape machine adjust.