Easel by Inventables is an intuitive tool for CNC (Computer Numerical Control) machining, combining design (CAD) and manufacturing (CAM) functionalities in one platform. Easel supports 2D and 3D CNC toolpaths, v-carving, and hundreds of custom fonts. This article walks you through a detailed process of designing a bowl in Easel, from conceptualizing your shape to carving it with precision. By following this step-by-step guide, you’ll not just learn the basics but also uncover advanced tips to perfect your carving project.
Step 1: Setting Up Easel and Creating a New Project
Before diving into the bowl design, it’s essential to prepare your Easel workspace. Follow these steps:
- Log in to your Easel account at Inventables.com.
- Click New Project from the home dashboard to start a blank canvas.
- Choose the correct material type and dimensions for your project:
- Wood is a common material for bowls, such as maple, walnut, or cherry.
- Input the dimensions of your material in Easel’s Material Settings panel.
- Configure the Machine Settings:
- Select your CNC machine (e.g., X-Carve, X-Carve Pro) from the dropdown menu. Ensure your machine’s firmware is updated for accuracy.
Importance of Machine Calibration
- Accurate machine calibration is essential for precise cuts. This includes setting the correct steps per mm for your machine’s axes and calibrating the Z-axis to prevent inaccurate cuts.
Step 2: Designing the Base Shape of the Bowl
Adding the Circular Outline
- In the Design Tools pane, use the Shape tool to add a circle to your canvas.
- Adjust the size:
- Use the Lock Ratio toggle to keep proportions equal if resizing.
- Input the desired diameter for the bowl (e.g., 6–10 inches).
- Center the circle:
- Select the circle, click Shape Position, and align it to Easel’s 0, 0 coordinate for symmetry.
Adjusting Depth
- Set the initial cut depth for the circle to the total depth you want for the bowl interior (e.g., 1 inch deep).
Using Layers in Easel
- Consider using multiple layers in your design for better management and precision. For example, you can have one layer for the bowl’s interior and another for its exterior.
Pro Tip: Use Easel’s snap grid to maintain proper alignment while creating your design.
Step 3: Creating the Bowl’s Curved Interior with the Super Gradient Generator
Easel includes a powerful built-in tool called the Super Gradient Generator, ideal for creating smooth, sloped shapes like bowl interiors. The Super Gradient Generator app in Easel is a powerful tool for creating smooth, sloped shapes like bowl interiors. It allows users to adjust gradient depth and step smoothness for custom designs.
- Open the Apps menu (left-side toolbar in Easel) and select Super Gradient Generator.
- Use the following settings:
- Base Shape: Choose the circle you created earlier.
- Gradient Depth: Set the desired depth based on your bowl’s pattern (e.g., choose 1 inch).
- Step Smoothness: Adjust for gradual or sharp gradients (a lower value like 5–10 for smoother bowls).
- Preview your gradient in the app before applying it to your design.
- Insert the finished gradient into your Easel workspace.
Modifying the Curvature
- For advanced users, manually tweak individual gradient points on the curve using Easel’s Edit Points tool.
- Ensure the slope is consistent around the bowl’s interior to avoid rough spots during carving.
Step 4: Preparing Toolpaths for Carving the Bowl
Once your design is complete, it’s time to configure toolpaths. This ensures the CNC machine follows precise instructions during cutting.
Selecting Bits
Using the right bit is critical for bowl projects:
- Roughing Pass: Choose a larger bit (e.g., a 1/4″ end mill or Whiteside Bowl Bit) to remove material quickly.
- Detail Pass: Use a ball nose bit or bowl bit (e.g., 1/8″) for a smooth, polished internal curve. Recommended feed rates for hardwoods are 40–60 in/min, and max depth per pass should be 0.05–0.08 inches for clean cuts.
Configuring Toolpaths
- Assign cutting operations (e.g., pocketing, detailing) for individual layers:
- Pocket Cut: Use this for carving bowl interiors, assigning the outer circle shape.
- Outline Cut: Define the bowl’s outer edge for the finishing pass.
- Input settings for cut depth, step-over, and feed rate:
- Recommended feed rate: 40–60 in/min for hardwoods.
- Max depth per pass: 0.05–0.08 inches for clean cuts.
Simulation Preview
- Click the Simulate button to preview the cutting sequence in 2D and 3D.
- Easel provides a carving time estimation feature, which helps users predict the time required for a project. The feature is accurate to within a few minutes for 95% of users.
Pro Tip: Adjust your settings if the simulation shows overly aggressive cuts or poor surface finishes.
Step 5: Carving the Bowl
Machine Setup
- Secure the Material:
- Use clamps or double-sided tape to hold the workpiece firmly in place. Ensure it does not shift during carving.
- Install the Selected Bit:
- For roughing, use the larger bit and ensure accurate Z-height calibration using scrap material.
Execute the Cuts
- Perform the roughing pass, removing most of the material from the bowl interior.
- Switch to the ball nose bit for detail pass, refining the curved surface.
- Cut the bowl’s perimeter in the final step to free it from the material block.
Step 6: Post-Processing and Finishing
Sanding and Smoothing
- Use various grits of sandpaper (e.g., 150 to 400 grit) to smooth any ridges left by the CNC.
- For tighter curves, try using a rotary tool or flexible sanding pads.
Finishing
- Apply food-safe finishes (e.g., mineral oil or beeswax) if the bowl is intended for serving use.
- For decorative bowls opt for a lacquer or polyurethane finish for a glossy appeal.
Additional Tools and Materials for Bowl Carving
Here’s an optional list to make carving efficient:
| Tool/Material | Purpose |
| Ball Nose Bit | Smooth and detailed bowl curves |
| Flat End Mill Bit | Quick material removal |
| Clamps/Double-Sided Tape | Secures material firmly |
| Sandpaper (150–400 grit) | Post-process finishing |
| Food-Safe Finishes | Seal and protect wooden bowls |
Where to Find Bits and Materials for Bowl Projects
Finding the right supplies for your bowl design is crucial. Here are some reliable sources:
- Inventables Store:
- Purchase carving bits like ball nose and bowl bits directly from Inventables.
- Online Retailers:
- Check providers like Amana Tool, ToolsToday.com, or Amazon for CNC-compatible bits.
- Local Woodworking Shops:
- Obtain high-quality hardwoods, finishes, and clamps from nearby stores.
- Community Recommendations:
- Visit Inventables’ forums for user tips on sourcing the best materials and tools. Inventables’ forums provide valuable community-driven advice and tips for sourcing the best materials and tools.
Common Problems and Troubleshooting
Uneven Curves in the Bowl
- Issue: Irregular toolpaths or chatter marks.
- Solution: Reduce step-over size in the carving settings and use slower feed rates for final passes.
Material Breaking or Splintering
- Issue: Cutting too aggressively.
- Solution: Use shallow depth increments and ensure the material is clamped properly. Also, if the bit breaks, it could be due to excessive force or incorrect bit settings. So be sure to check these and replace the bit if necessary.
Material Warping
- Issue: Material warps during or after carving, which could be due to uneven cooling or improper clamping.
- Solution: Use a heat gun to dry the material evenly and ensure it is clamped securely to prevent warping.
Conclusion
Designing and carving a bowl in Easel by Inventables is an achievable and rewarding project for CNC enthusiasts of all skill levels. Using tools like the Super Gradient Generator, selecting the right bits, and following a structured process, you can create beautiful, functional bowls with smooth, curved interiors. For continued inspiration, check out Inventables’ tutorials and explore their forums for community-driven advice.
Easel Pro, with its benefits such as decreased carving time and the ability to create personalized products with hundreds of built-in fonts, can play a significant role in making this process even more efficient. Easel Pro helps businesses produce more products per day by decreasing the time required to carve detailed products, making it an excellent tool for those using CNC machines commercially.