CNC Router Spoilboard Surfacing Bit FEEDS and SPEEDS - Garrett Fromme

Introduction

This tutorial provides a comprehensive guide on setting up feeds and speeds for a CNC router surfacing bit. Surfacing bits are essential for leveling spoilboards, which may not be parallel to the router's motion. Correctly configuring your CNC router’s settings can enhance the quality of your projects and help recover scrap wood efficiently.

Step 1: Gather Necessary Tools and Materials

Before starting, ensure you have the following:

• 1” Surfacing Bit: Required for surfacing your spoilboard. You can find one here.
• CNC Router: With compatible software like Vectric Aspire, Vcarve Pro, or others.
• Calipers: For precise measurements.
• Sanding/Buffing Brushes: For finishing touches.

Step 2: Understand Surfacing Bit Specifications

Familiarize yourself with the specifications of your surfacing bit:

• Cut Diameter: 1 inch (25.4 mm)
• Number of Flutes: 3
• Flute Length: 0.25 inch (6.35 mm)
• Shank Size: 0.25 inch (6.35 mm)
• Overall Length: 1.5 inch (38 mm)
• Material: Carbide tipped with a 4140 steel body

Step 3: Configure Feeds and Speeds

Set your CNC router using the following parameters:

• Spindle RPM:

  • Recommended: 13,000 RPM
  • Adjustment: Use the manual knob to adjust RPM to 1/6th from maximum.

• Feed Rate:

  • Standard: 100 inches per minute (for robust machines).
  • Adjustment for Less Robust Machines: 60-70 inches per minute.
  • Metric Conversion: 42-45 mm per second.

• Plunge Rate:

  • Recommended: 10 inches per minute (5 mm per second).

Note on Feed Rates

• If your machine struggles or deflects, reduce the feed rate by 20%.
• If you notice burn marks, increase the feed rate by 20%.

Step 4: Set Up Your CNC Software

1. Open your CNC software (e.g., Vectric, Easel, Carbide Create).
2. Input the feeds and speeds configured in Step 3 according to the software's requirements.
3. Create or load your surfacing file to prepare for the operation.

Step 5: Perform a Test Run

Before surfacing your actual spoilboard, perform a test run on a scrap piece of wood. This will help you:

• Confirm the settings.
• Ensure the router operates smoothly without excessive deflection or burning.

Step 6: Surfacing Your Spoilboard

1. Position the surfacing bit on the spoilboard.
2. Start the CNC router and monitor the operation closely.
3. Check the surface for evenness after completion.

Conclusion

Setting the correct feeds and speeds for your CNC router surfacing bit is crucial for achieving a level spoilboard and recovering materials effectively. Remember to adjust parameters based on your machine’s performance and conduct test runs to ensure optimal results. For further learning, consider exploring detailed tutorials on CNC operations or joining CNC-related communities for additional support.