A combination machine is a woodworking machine that combines the functions of two or more separate machines into a single unit. For example, a combination machine might consist of a tablesaw with a side mounted jointer. Another common example of this type of machine is the jointer-thicknesser (also known as an over-under) which combines the function of a jointer with that of a planer.
Some combination machines run all of their functions from a single motor; others may use more than one. Cutter heads are often shared: for example a jointer-thicknesser may use the same cutter head for both functions. The machines rely upon well thought-out designs which allow the user to switch from one function to another easily.
One rationale for the production of these machines is space saving. A combination machine takes up much less space than the equivalent separate machines. Most European machines have a sliding table that tends to make them safer than typical North American table saws. Even though top end combination machines can be quite expensive, there usually is a cost saving over separate machines of similar quality.
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