Dear Kamlesh

you have to ask about non performance of the equipment from the manufacturer of the system or from your consultant.

you have to give all technical particulars to designer for proper checking of design

It appears tension given is less than required and you have bolted the trolley

Take up trolley reversing can be avoided by doing slight modifications in trolley

I sugest to obtain services of professional in the field

A R SINGH ■

Dear Kamlesh:

Mr. Singh has pointed you in the right direction of consulting with your system supplier/designer/builder.

What is missing in your request is the detail on what stops the system (pulley/belt speed differential? / belt misalignment? / motor overload? / other?). Your control system should tell you what is wrong. Once you have this information you can normally come up with the appropriate corrective action.

It is unusual to have a system that can only run at 75% of design - but mistakes do happen.

The matter of your take-up is another design concern. By bolting the take-up trolley in-place you have negated the major benefit of the take-up operation. You would be better served to put a non-contact containment rail over the trolley wheels so that the rail would only make contact if the wheels start to jump off their track.

Regards and Good Luck, ■

Send me the details on the conveyor. I will evaluate free of charge. Sounds like the engineer did not apply conventional wisdom to miss the tonnage so badly.

See my email contact details below. ■

Dear Kamlesh

Your main problem is you have bolted the takeup trolley and take up is not providing proper tension required for transmitting effective traction between head pulley and belt.

You have to make take-up trolley functional either

by providing rail above wheels to avoid trolley tilting .

And/ Or--- by balancing trolley by shifting Trolley pulling rope

position vertically

And/ Or --- by increasing trolley wheel canters

A R SINGH ■

Dear Shri Kamlesh,

It is obvious that the conveyor you are mentioning is not designed and constructed properly. This conveyor needs to be redesigned (rechecking the design in totality) and adopt the corrective measures as needed, from design point of view and also from construction point of view.

The redesigning can be done in such a manner that there would be bare minimum expense to the owner. Your 1.1 km long conveyor installation cost would be more than Rs. 35 million; the redesigning and complete checking expenses would be insignificant amount compared to the value of this conveyor. This is the only way to remedy the conveyor and to get neat and clean performance.

Attending such difficult issue in adhoc manner doesn’t give the desired results and it remains perpetual head ache for operating personnel and a bottleneck in total system.

Regards,

Ishwar G Mulani.

Author of Book : Engineering Science and Application Design for Belt Conveyors.

Author of Book : Belt Feeder Design and Hopper Bin Silo

Advisor / Consultant for Bulk Material Handling System & Issues.

Email : parimul@pn2.vsnl.net.in

Tel.: 0091 (0)20 25882916 ■

Dear Kamlesh

In such cases where end user do the modification without releasing implications designer should not be blamed and there is no need to check the design In this case take-up trolley is bolted and sufficient tension is no available to run the conveyor on full load.

You try to modify trolley so that it can move freely and takeup weight can be applied on conveyor

A R SINGH ■