It is important that the belt should not vibrate and/or slip. The belt drive is a dual belt drive with a belt tensioner. It can, however, also be operated with only one belt. The accessory set-up can be used to investigate conditions that cause vibration or slip. The effect of disparate elongation on multiple belt drives can be demonstrated by means of individually-adjustable tensioning rollers. When properly designed, manufactured, and correctly set; belt drives are low-maintenance, low-noise, long-life drive units. The brake and load unit is required to conduct the experiment. The accessory set can also be used to apply transverse loads in other experiments. An eccentrically-bored small belt pulley and a damaged V-belt enhance the range of possible experiments.
....
