What are the causes and countermeasures for the stick-slip phenomenon?
Stick-slipping is when even though items are to be continuously conveyed in a smooth motion; the conveyor stops and starts repeatedly, causing a hick-up like phenomena in the chain movement. In general this occurs when chains are over 10ms in overall length, and moving at a speed of 15m/min or less. Causes: • Fluctuations in the coefficient of friction between the bush and roller • Insufficient chain rigidity • Insufficient rigidity of drive unit/frame Countermeasures • Increase chain speed • Break conveyor up into several small conveyors • Use larger chains, and strengthen frames and guides to raise the overall rigidity of the conveyor • Lower the coefficient of friction between the bush and roller, increasing stability.
