Surface Planing
The purpose of planing on a jointer is to produce one flat surface. The theory behind this is that once you have one flat surface on a board, the board can then more readily be milled to precise, flat dimensions on a thickness planer. It is nearly impossible to surface plane both sides of a board effectively because the two surfaced sides will retain any warps, cups, or twists.
1.Inspect your lumber for soundness and grain direction.
2.If the stock is cupped (warped), place the concave side down and slowly feed it over the cutterhead as shown in Figure 21.
Always use push paddles when planing the surface of a board. Failure to comply may result in serious personal injury.
Figure 21. Correct method for surface planing.
3.Inspect your results. Most likely, many pass- es will be necessary before your lumber has a flat surface.
4.If the stock has large or loose knots, consid- er finding another workpiece. Knots in a workpiece can be dangerous to the operator, as well as destructive to equipment.
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