One of the benefits of synchronous belts is their ability to operate with lower tension than their V-belt counterparts. And once the proper tension is determined and applied, synchronous belts rarely need re-tensioning. But improper tension in a synchronous belt drive system — either too low or too high — can lead to poor meshing between the belt and pulleys, belt ratcheting, or even reduced load and acceleration capability.
The proper tension value for a synchronous belt drive system depends on the application — taking into account factors such as the drive torque required for moving the load, the acceleration/deceleration of the belt, and the orientation of travel (horizontal, vertical, or inclined). Manufacturers offer guidelines or suggested “starting values” for belt tension, but often advise real-world testing to determine application-specific tension requirements.