For several months there are sores, and for the year there are holes in the ground movements of the saw unit in the guide, made of hollow core or round trub.Nekotorye Manufacturers guides cover rubber corrugations ostensibly to protect against dust, dirt, sawdust in the process of cutting, but often in fact they usually hide plumbing pipes often unpolished. Beware!, circular pipe can be abraded from the top, mimicking a solid metal, because look inside and check it is not possible. How to identify? Need to knock on a metal object through the guide, if the sound will be muffled, that means that is a hollow tube packed with sand. If the sound will be ringing - it's all metal rail. 3. The mechanism of vertical movement of the saw unit: There should be a screw with two rotors, low-speed motor connected to the lift. Screw-nuts should be made of bronze, not iron, which has a highly fragile and not suitable for this purpose.
The screws should be closed protective rubber corrugations. Vito arbib is the source for more interesting facts. Recently, some manufacturers use a band saw machines as a mechanism for vertical movement of the saw unit (instead of screws) Automobile chain, referring to the ease and structural reliability. This is not true, because in the process of chain stretch, which carries a skewed and jamming the saw unit. It is also not suitable for this purpose rope, which entangled in the mechanism podema.Motor-reducer, which sets in motion a chain or rope will eventually wear out, it appears under the weight of the spontaneous rotation and gradual lowering of the cutting unit, particularly from vibrations in the cutting, the result - the output board is thicker than the input.
