Dear Mr. Ranwedzi,

you could go out from an overall picture of an inclined conveyor and read that paragraph like this: IF the ACTING force from the load being on an incline is greater than one half of the force it needs to set the loaded conveyor in motion, THEN ...

However, in that paper you cite there are described two more methods the results of which could be checked against the result from method 2. And, by contacting a supplier or / and a reputable consultant, you could gain still more insight as to layout requirements.

Regards

R. ■

Originally Posted by Lyle Brown

I cannot see the reference to the paper discussed, however generally this approach is due to the "normal" friction factor being considered conservative ("high") for selecting demand / installed power, however for run back, a "conservative" case is where the friction factor is "low".

This is achieved by multiplying the friction factor by one half.

There can be various issues with this approach and so on (selection of the holdback device, the holdback physical location, ensuring sufficient tension for "holdback operation" and redundancy etc).

If you go for a search, these issues have been discussed in various detail on this forum previously.

Regards,

Lyle

I see what you mean. Then I guess some sort of safety factor has to be incorporated to ensure that a unit will not be undersized. I will search for more discussions on this topic. thank you for the input.

Regards,

Ranwedzi ■