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Technical norms

Technical service

Troubles Causes Countermeasures
Belt runs deviation to one side at a given section of the conveyor frame.
 

◎ Conveyor frame or structure crooked.

◎ Idler stuck with materials.

◎ Idler poor running.

◎ Idlers or pulleys out-of-square with center line.

◎ Pulley center skews or sticks with materials.

◎ Idlers in forepart of the affected area isn’t perpendicular to the running direction of the belt.

 ※ Check the affected area and adjust the straightness and levelness.
※ Remove accumulation, install scrapers and other cleaning devices. 
※ Improve maintenance and lubrication. 
※ Readjust the idlers in affected area. 
※ Adjust the pulley center, install scrapers, and remove attachment. 
※ Adjust it. 
Particular section of the belt runs deviation at all parts of the conveyor frame.

◎ Belt joint crooked.

◎ Insufficient straightness of the belt itself.

※ Cut off the joint section and resplice.

※ Install the automatic centering idler at the return section of the tail pulley.
Belt runs deviation for long distance or at entire length of the belt.

◎ Belt runs deviation near tail pulley within the carrying area. 
◎ Materials are unevenly loaded on belt off center 
◎ Idler stands not centered on belt. 
◎ Conveyor frame or structure crooked. 
◎ Belt sometimes runs deviation while sometimes not, which is often caused by the wind. 
◎ Idlers on one side falls.

 

 ※ Install the correcting idler in the front of the tail idler. 
※ Improve the loading position. 
※ Readjust the idler in the affected area. 
※ Check the affected area and adjust the straightness and levelness
※ Install wind shelter and automatic centering idler.
※ Make idlers. 
Belt runs deviation at tail pulley. ◎ Belt runs deviation around tail pulley through the loading area. 
◎ Material slippage or stacks. 
◎ Idlers or pulleys out-of-square with center line. 		 ※ Install correcting idler prior to tail idler. 
※ Improve loading and transferring conditions, install cleaning devices and improve maintenance.
※ Readjust the idlers in affected area.
Belt runs deviation at head pulley. ◎ Damages in coating rubber. 
◎ Material slippage or stacks. 
◎ Idlers or pulleys out-of-square with center line. 
◎ Idler stands not centered on belt.		 ※ Replace pulley or recoat. 
※ Improve loading and transferring conditions, install cleaning devices and improve maintenance. 
※ Readjust the idlers in affected area. 
※ Readjust the idler in the affected area.
Belt slips.  ◎ Insufficient traction pull between belt and pulley.
◎ Damages in coating rubber. 
◎ Counterweight too light.		 ※ Thicken the coating rubber on the drive pulley and install cleaning devices.
※ Replace pulley or recoat. 
※ Add counterweight or take-up pulley.
Scratch, cuts, stripping, or abnormal wear on the top cover. skirt board.

◎ Insufficient length of skirt board.

◎ Improper skirt materials or use used belt with the canvas exposed, getting in touch with the belt. 
◎ The feeding speed of the material is inconsistence with belt running speed. The material slips at the moment of falling to the belt. 
◎ Material stacks in or under chute.
◎ Material impacts belt. 
◎ Return idler sticks with material.
◎ Improper cover.

※ Adjust the length until the materials be stable on the belt. 

※ Select proper rubber skirt board. 
※ Adjust the feeding speed of material to be consistence with belt running speed.
※ Improve loading to reduce spillage and install chute with wider baffle.
※ Improve the chute design to reduce impact and install impact idler or buffer-bed.
※ Clean the accumulation or add cleaning devices. 
※ Replace with higher grade cover.
Scratch, tear, or abnormal wear on the bottom cover. ◎ Idler poor running. 
◎ Belt slips on the drive pulley. 
◎ Idler stuck with materials. 
◎ Bolt protrudes the lagging.
◎ Material trapped between belt and pulley. 
◎ Damages in coating rubber. 		 ※ Improve maintenance and lubrication 
※ Fasten the stretching roller or add counterweight, increase contacting area. 
※ Remove accumulation, install scrapers and other cleaning devices. 
※ Fasten the bolt, replace the lagging and better to use vulcanized lagging.
※ Install plows or scrapers on return side ahead the tail pulley. 
※ Replace pulley or recoa.

 

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