Hi, just did this video of my mate's Sapphire plant for anyone who might want to see the basic concept of how they work. If you are thinking of making one, shop around for materials. You can sometimes get the more expensive items like steel, block bearings, pulleys, mesh and even the motor second hand or cheap on eBay. if you are a bit clever you can use motorcycle sprockets and chain on the slower moving parts because pulleys and especially the big belts are very expensive. If you are really clever you can incorporate reduction gear boxes instead of some of the belts and pulleys. If you are making one for gold you will need a lot different setup with a wet trommel and a sluice. Thanks for watching.
