Common problem: 1, 2, with abnormal wear belt tooth broken 3, 4 of tooth edge belt use serious wear, belt running deviation, belt longitudinal solutions: 1, do not kink belt, wide belt or big pulley installation, increase the pulley diameter or width of the belt, removal of foreign body, correct tension. 2, correct tension, installation width greater, higher power transmission belt/increase the size of the belt and pulley size, check the belt type, replace if necessary. 3, replace the belt wheel. 4, re-align axis, replace belt wheel flange, reinforcement bearing or chassis. Re-align with 5, change the flange pulley wheel/shaft, correct tension, removal and installation of protective cover, check the cutting device and guide.