To properly tension a belt, follow these steps:

Check the manufacturer's specifications: The first step is to check the manufacturer's specifications for the correct tension. This is usually the distance of deflection when a specific force is applied.

Measure the belt span: The belt span is the distance between the centers of the two pulleys.

Apply force and measure deflection: Apply a specified force at the midpoint of the belt span and measure the deflection.

Adjust the tension: If the deflection is more or less than the specified value, adjust the tension. This is usually done by moving the motor or adjusting the tensioning device.

Recheck the tension: After adjustment, recheck the tension to make sure it is correct.

Chain

To properly tension a chain, follow these steps:

Check the manufacturer's specifications: As with belts, the first step is to check the manufacturer's specifications to determine the correct tension.

Measure the chain sag: The chain sag is the vertical distance the chain hangs in the middle of the span.

Adjust the tension: If the sag is more or less than the specified value, adjust the tension. This is usually done by moving the sprockets or adjusting the tensioning device.

Recheck the tension: After adjustment, recheck the tension to make sure it is correct.

NOTE: Over-tensioning can cause excessive wear and shorten the life of the belt or chain, while under-tensioning can cause slippage and reduce efficiency.