| 摘要 |
A machine for the versatile removal of material for shaping an object. The machine includes a platform that provides support for three substantially horizontal and parallel plates. The uppermost plate or "table top" is height-adjustable and provides a working surface. The table top has a plurality of guide pins projecting downwardly therefrom and a centrally located aperture. The adjustable table top is supported by at least one height adjustment means such as a scissor jack interposed between the adjustable table top and an underlying support plate. The support plate is rigidly attached to the platform and has an aperture therein which underlies the aperture in the table top. A motor having a drive shaft with a belt drive thereon is attached to a motor mounting plate disposed below, and adjustably attached to, the overlying support plate. A circular drive belt having a grinding outer surface engages the belt drive and extends upwardly through the aperture in the support plate to rotationally engage a versatile split-pulley assembly. The split pulley assembly is affixed to, and extends upwardly from the support plate to project through the aperture in the table top. The portion of the drive belt and split-pulley assembly extending upwardly through the aperture in the table top is varied by raising and lowering the table top by means of one or more scissor jack(s). The drive belt preferably has a grinding outer surface and includes a guide belt adhered to, and coextensive with the inner surface of the drive belt. The guide belt maintains the position of the drive belt on the split-pulley assembly. A variety of cutting accessories are disclosed which may be attached to the split-pulley assembly. The machine includes several different types of belt drives, belts and split-pulleys, each suited for performing a specific grinding or cutting operation.
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