How to machine plane Diamond shaped timber
Woodworking machinery used: Planner Thicknesser and Bench Saw or Band Saw
1. Cheat, use your bench saw or band saw first.
The first cut is the most important and might need a bit of prep first. The edge running against the guide will actually be a corner, just check its straight first. If it’s not just tidy it up so it will run flat along the guide over the full length.
TIP: Don’t run the acute corner at the bottom of the guide.
Flip the piece over for the third cut so you are using the original face against the bed and 1st cut against the guide.
2. You’ve got square corners so send it through the thicknesser to clean it up to the finished size.