On a bucket elevator maybe it's just a matter of getting the required power into the shaft and on to the pulley/wheels?? ■

Hello,

The choice is usually cost - both item costs and inventory costs. Sometimes two gearmotors added is less in cost than a single unit of same power/ speed rating.

Sometimes there are mechanical issues - a flexure suspended feeder for example . For large feeders in flexure suspension - two gearmotors are needed - else the frame gets twisted on one side. ■

Drive units may be modularized:

1. to simplify inventory. One drive unit may be used in single or multiples throughout a plant, mine, port, etc.

2. for reason mentioned, to minimize T2 in case of dual pulley drives

3. to allow increase in production over time. A system may only need to achieve full production years after initial operation. Modularizing drives allows the addition of power as it becomes required.

The last case was employed at a major slope belt from an underground coal mine.

Joe Dos Santos ■