Phil Eichmiller, Senior QA Engineer shows you how to design criss-cross grooves in Fusion using sketches, sweeps, and pattern tools for precise machining control.

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Crosshatch or criss-cross groove patterns are common in machining for texture, grip, or aesthetic purposes. While machinists often have clever tricks for producing these patterns directly on the shop floor, you can also model them in Fusion to control the geometry yourself. In this tutorial, we’ll walk through how to design and pattern criss-cross grooves in Fusion.

Step 1: Understand the machining context

• Before modeling, determine how the grooves will be cut.
• Many CAM operators have built-in strategies for engraving or texturing surfaces with straight-line toolpaths.
• If you want full control over the geometry in Fusion, proceed with modeling.

Step 2: Sketch the groove profile

1. Create a plane along the path where you want the groove.
2. On that plane, draw a sketch of the groove cross-section.
   • A simple polygon or rectangle works well.
   • Dimension the sketch to control groove depth and width.
3. Finish the sketch.

Step 3: Sweep the groove

• Use the Sweep tool to extrude the groove profile along your chosen path.
• This creates a single groove cut into the part.
• Adjust the sweep path angle or length to control the groove’s orientation.

Step 4: Pattern the groove

1. Select the groove feature.
2. Use Pattern > Feature Pattern to repeat the groove across the surface.
   • Define spacing, count, and direction.
   • You can pattern in one direction first.
3. To create the criss-cross effect, mirror the pattern:
   • Create an offset plane in the middle of the part.
   • Use Mirror > Features to mirror both the original sweep and the patterned grooves.
   • This produces intersecting grooves at an angle.

Step 5: Refine the pattern

• Adjust groove size, angle, or spacing by editing the original sketch.
• Modify the pattern count or direction for different densities.
• Experiment with mirroring at different angles to achieve unique textures.

Criss-cross grooves: Tips & tricks

• Editable workflow: Because the grooves are built from sketches and features, you can easily tweak dimensions later.
• CAM alternative: If you only need the grooves for machining, consider engraving toolpaths instead of modeling.
• Creative control: Mirroring and offsetting patterns can produce interesting visual effects beyond simple crosshatching.

By breaking the process into small, editable steps—sketch, sweep, pattern, and mirror, you can create precise criss-cross groove patterns in Fusion. Once you’ve tried the workflow a few times, you’ll find it easy to adjust and customize for different parts and machining needs.