Subjects speaking for an installation of an automatic ROSTA Motorbase ROSTA

SAVING ENERGY

Motor tensioning carriages and JORDAHL rails are rigid motor suspensions, and require regular inspection and the necessary re-tensioning of the belts, otherwise too much of the drive energy will be lost as heat-generating belt slip!
“This small amount of energy loss still does not justify the much higher investment that has to be made for self-adjusting motor suspension!” - is what you’re likely to say if you don’t realise the true cost of excessive belt slip.

The leading US belt manufacturer GATES has measured the average slip in friction-belt drives on hundreds of drive systems, and has thereby found that many belt drives work with a slip loss of up to 10 % before the effective reduction in the delivered torque is registered! Slip generates heat – and energy is thereby wasted.
In addition, the survey carried out by GATES stated that the average power loss in friction belt drives could be quantified with an absolute figure of 5 %. A non-self-adjusting, rigid motor suspension on a belt drive system can thereby result in an energy loss of 5 %!
When considered superficially, a loss of 5 % of the drive energy does not seem to be very much. If you take a closer look at the cost side, however, the energy loss for a
45 kW motor with size 225 M and a kW-cost price of 0.12 € for industrial electricity, for example, already starts to cost big money when considered over a year!

- If the motor runs in a single shift (40 h/week), the loss amounts to € 540 a year!
- If this same motor runs in two shifts (80 h/week), the loss increases to € 1,080 a year!
- And if it runs “around the clock” (168 h/week), this increases further to € 2,268 a year!

The ROSTA Motorbase continually compensates the belt slip and thereby saves the above-mentioned amounts – which is a solid argument in favour of the somewhat higher investment!