The art of conveyor belt tracking. Part 1.
Sketches above shows how a crowned pulley works. Left picture Equilibrium. Left and right pushes belt to centre position. Picture right. Left side has a stronger force to push belt until left and right have same distance to centre position of belt.
This is fine for a pulley firmly mounted in a frame. Do NOT confuse yourself believing this is the way to track a belt. Please study the text below and try to understand. It can take some time as you have probably been fed with the wrong information from too many track producers.
There is a general misunderstanding around the world how to make a conveyor belt run straight.
Belt tracking producers around the globe believe that conical or crowned rollers make the belt run straight. This is a very major misconception on how belt tracking works.
Imagine a car tire. It has a flat surface, by changing the angle between tire and road the car moves sideways. If a crowned shape of the tire had been advantageous for the steering of a car, you can rest assured that car industry had developed crowned tires.
The only time you run with crowned tires is when air pressure is too high, resulting in wear of centre part of tire.
When a crowned belt tracker idles, it is still worn due to different peripheral speed. It costs energy and belt wear every time the crowned shaped tracker is installed.
Tracking is the effect of moving the weight of belt sideways making the tracker swing and guide the belt back to a straight line. This kind of tracker has a cylindrical surface and no wear or cost of energy in the idling mode. It can also move vertically to accommodate the vertical movement of a belt when moving sideways. Thus, the full length/surface of the tracker is doing the job to bring belt back to a straight line. A tracker that does not allow vertical movement is only partly doing its job.
Prime-Tracker have solved the problems so many trackers suffer from. Curious?
Drop me a mail and you will get more information.