What causes a conveyor belt to run skew?

Make sure that all parts of the conveyor are clean to ensure smooth operation and avoid failure. For a single idle station, the mechanics can be much more complex. One of the reasons why a belt does not turn properly is always due to a deformation of the belt or to a biased pulley or intermediate station. Since the belt not only moves on the rollers but also slides, there is friction and therefore increases belt wear.

As in the case of cutting rollers, the end of the roll to which the belt moves must be moved lengthwise in the direction of travel of the return belt to correct the situation. The side guide rollers should not be positioned so that they rest against the edge of the belt once the belt is actually on the pulley. If a belt constantly hits a structure, not only can it damage the structure, but it can also shave layers of the belt until there is little left. This tracking measure is only possible for belts with sufficient lateral stiffness and edge integrity; however, wear on the edges of the belt will increase.

Forces in the lateral direction act on the belt due to air flow around the belt at high speeds. The problem with this method is that the edge of the belt hits the roller with great force without much effect, exerting great pressure on the edge of the belt. The guide pulley A follows the belt correctly in the direction of travel a, the guide pulley B follows the belt correctly in the direction of travel b. The rear pulleys may have a section of belt without support that comes close to them and crowning them may help, except when they are at points of high belt tension.

If you suspect this, remove the conveyor belt from the unit and place it on the floor to ensure that it is straight. The lateral movement is directly proportional to the angle of inclination, provided that the force acting on the belt is less than the maximum friction force between the belt and the pulley. Unfortunately, sometimes even the slightest movement or change in the conveyor can cause the belt to stray from the path. In areas where local transverse forces occur, crawler belts will be held in place by additional straps.

Inclined rollers on the return side have also proven effective in tracking wide, short belts and thin belts at high speeds.