1. Abnormally high bearing temperature: Excessive tension will subject the drive roller and motor bearings to excessive radial load, leading to a surge in frictional heat. After 10 minutes of operation, a bearing housing temperature exceeding 40°C above ambient temperature is abnormal; it will feel noticeably hot to the touch. Prolonged high temperatures will accelerate grease failure, causing bearing pitting, seizure, or even shaft breakage.
2. Belt edge wrinkling, stretching, or cracking: Excessive stretching will cause plastic deformation of the belt material, especially at the joints, easily resulting in edge wrinkling, delamination, or longitudinal cracks. Rubber or PU conveyor belts may experience permanent elongation, losing their elasticity and recovery ability.
3. Vibration and resonance during operation: Excessive tension can easily cause resonance in the mechanical system, manifesting as periodic belt vibration and frame swaying. This is particularly noticeable at high speeds, possibly accompanied by a "humming" sound, and in severe cases, it will affect transmission accuracy.
4. High motor current, increased energy consumption: If the motor current exceeds the rated value by 5%~10% during no-load operation, it indicates excessive transmission resistance. Prolonged overload operation not only increases electricity costs but may also trigger overload protection shutdown.
5. High-frequency abnormal noise and metallic friction sound: If the synchronous belt is too tight, the pressure between the tooth surface and the pulley groove is too high, easily producing a piercing screeching sound. Excessive preload on the bearings may also cause periodic "clicking" sounds, which is an early sign of damage.
