1. motor chain is loose. 2. the motor and control system has problems, including the control system parameter setting error. 3. door body is quite tight, the door body assembly is poor, the operation is not smooth. 4. nose floor is not heavy enough, some small manufacturers in order to save money, 15 meters of the door should be equipped with 8 per cent of the board, but they only with 3 per cent board, leading to weight loss. 5. The door body styles originally is not suitable for trackless, and some of the professional manufacturers think any styles can do, ignore the technical requirements of the rail electric retractable door, the door head loss of the parallel.6. The floor, which is a very important issue, decent tilt, or uneven are not qualified. |
