Dear Mr.Deepmac,

Have you done any job on the conveyor lately? When the conveyor goes off track, does it with material ? What is the pulley lagging type? What is the take up arrangement?

Regards, ■

Do you know the manufacturer and if they supplied tilted frames. Many idler suppliers provide idler support frames (transoms) with a 2 degree forward tilt. This tilt was made to correct installation errors.

Even if the frames have no forward tilt, some installers make the adjustment with a small shim that cants the idler frame forward in the direction of travel (single direction).

Ways to make the system track correctly:

1. Idler with forward tilt, place a small washer under the foot at the bolt connection with the stringer that brings the frame normal to the belt direction. Once installed the idler must be 90 degrees to belt motion and level.

2. Jig a frame device with surveyor prisms and mirrors that will give you a reference point and degree of misalignment. Then you must make the correction to the neutral position. Prok (Sandvik) used to make the Prok Conveyliner (sic) which did just that.

https://forum.bulk-online.com/showth...threadid=10476

3. When all trough and idlers are positioned at 90 degrees to the belt and are level to earth, the belt will track true unless there are bearing and seal imbalances. It will not matter which direction you operate the belt, but take care that all pulleys are also 90 degrees to belt motion and are level. ■

We at SureGuide have designed and tested various products to correct belt misalignment on reversible conveyors and Mr Nordell as well as Mr Spriggs have given very valid and good advice for solving many of the issues of belt tracking over the years.

Our core products ,by design ,only work on single directional belts however through the use of a linear actuator which is electrically connected to the directional drive contactors ,we are able to correct reversible belts as well.

The problem with any manual adjustments to a reversibl belt is that what works for you in one direction will came back to bite you in the reverse direction.

One has to way up the cost of resovling the problem and also look at the potential of it reoccuring at some time and way all this up against the cost of a quality product that performs and lasts and that will prevent damages and downtime.

Feel free to visit our website and contact us or any of our agents internationally for more assistance. Good Luck. www.sureguide.co.za. ■

Originally Posted by Deepmac

Thank you for reply. Kindly note belt is Empty, Pulley lagged by Natural Rubber and take up is vertical gravity type.

With regards,

Deep

Thank you Mr.Deepmac,

Does the belt off tracks in carrying in forward direction and in return side in reverse direction? Does it off tracks through out length of the structure? Or only at a portion of the conveyor? What is the pattern of the drive pulley lagging?

Regards, ■

Over 13-years ago I worked on a project with British Steel that was similar.

They had reversable stacker\reclaimers that were in need of major work.

With great effort they could get the belt to track in one of the two directions but if they changed the direction the belt would track off. They tried so many different tracking devices with little success.

They were convinced to try a Sempertrans Autostable belt, a belt that has a self-tracking feature built into the carcass.

The belt was installed and it instantaneouly self-centered in both directions.

I have dozens of other referenses where this belt has solved severe tracking problems.

Im not saying that there are not other ways to solve but this is one of them that you might like to know about.

http://www.sempertrans.com/fileadmin...ostableuk.pdf ■