How to machine plane Bowing on timber boards
Woodworking machinery used: Planner Thicknesser and Bench Saw or Band Saw
1. Use the same set up as for planing a winding or twisted board. Except this time face it so the convex is up and support the underside so the thicknesser rollers don’t force the bow down.
2. Hopefully your sides will be flat. If not then you have some springing. Follow the procedure bellow
How to straighten up Springing on timber boards
You don’t plane it, you use a table saw or bandsaw as this distortion is only on the edges of boards.
This is similar to step 4. from “How to Plane up Winding or twisted"
1. The springing is on the sides. If your saw fence is twice as long as piece i.e. able to guide both ends for the entire cut, you can easily trim the first edge.
That’s going to be a long guide if you’re making a table top!
Alternatively, fix the board to another one that does have a straight edge. Then run the straight edge along the guide.
2. Then clean up the edges on the planer using a perpendicular fence.