Installation

1. Installation LuffConveyor Components

3. Structure Alignment • Parallel • Straight • Square • Level

4. Parallel

5. Straight

6. Frame Alignment

7. Level

8. Pulleys

9. Pulley Alignment • + or - 1/32” level & perpendicular to the belt • Misalignment • Excessive thrust load on bearings • Accelerated & uneven lagging wear • Belt training problems

10. Installation • Idler alignment • Square and in-line to the conveyor centerline and referenced from a terminal pulley • Parallel to each other

11. Idler Alignment

12. Installation • Belt alignment • Initially - train the belt empty • Then - train the belt under full design load • Helpful hints • Only one person supervise the training

13. Installation • Belt alignment • Helpful hints (continued) • After run-in period, check readings for voltage, amps, or watts for comparison • Higher future readings may indicate excessive drag from de-training or frozen idler rolls

14. Installation • Belt alignment • Helpful hints (continued) • Do not over-train. This will increase belt wear and power consumption

15. Effect on Idler Life

16. Effect on Idler Life

17. Effect on Idler Life

18. Maintenance • Inspection Plan (continued) • Thoroughly clean grease fittings to eliminate the possibility of introducing contamination into bearings

19. Maintenance • Skirtboard adjustment • Skirtboards centralize & shape the load to minimize spillage • Steel backing plates should be high enough to avoid risk of contact with the belt • Typical gap is 1/2” at the tail opening and increases to 1” at the exit of the load zone

20. Maintenance • Belt splicing • The splice “MUST” be square • The only corrective action for a non-squared splice, is to re-splice

21. Training Problem Conveyors

22. Maintenance • Training • Training or self-aligning idlers DO NOT train a belt • Only the center roll of a troughing idler effects training. Wing rolls only offer load support

23. Maintenance • Training (continued) • Tilting troughing idlers forward, not over 2 degrees, in the direction of belt travel, produces a self-aligning effect (caution on reversing belts)

24. Maintenance • Training (continued) • Procedure • Square and level all troughing idlers, return rolls, tail, head, take-up, snub, and drive pulleys • Check counterweights and the sag on the return belt (2” per 10’)

25. Maintenance • Training (continued) • Check all center rolls on troughing idlers & check return rolls for proper belt contact • Check troughing frames for tilt degree and make corrections

26. Maintenance • Training (continued) • Start training adjustments at the head end and on the return side. Check and adjust all return rolls to the tail pulley (this assures early centering at the loading point on the belt)

27. Maintenance • Training (continued) • After the return side is running true, start training the top troughing idlers from the tail to the head pulley (end of procedure)

28. Maintenance • Training (continued) • Train the belt empty first, then train the belt under full design load • If the belt trains well empty, then later problems will be due usually to off-center loading or material build-up on rolls

29. Maintenance • Training (continued) • Idlers can be “knocked” to train belt • In the direction of belt travel, knock forward the idler end to which the belt runs (***visualize bicycle handle bars***)

30. Maintenance • Training (continued) • Shift idlers in the area preceding the detraining area of the conveyor • 1/4” max adjustment • Caution - knocking may have adverse effects on reversing belts

31. Maintenance • Training (continued) • Training idlers should not be located within 25-50 feet of a head or tail pulley, vertical curves, or abrupt changes in direction • The belt tends to run to the down side of an unlevel pulley

32. Maintenance • Training (continued) • V-trough return rolls train very well • The side guide rolls on training idlers should be mounted inbound of the belt direction