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How Do You Cut Blank PCB?

Published in PCB Fabrication 3 mins read

Cutting a blank PCB (Printed Circuit Board) requires a careful and methodical approach. Here's how you do it:

Steps for Cutting PCB

Based on the reference provided, here is a step-by-step guide for cutting blank PCBs:

  1. Clean: Before you start, make sure the PCB is clean. This removes any dust or debris that may interfere with the cutting process.
  2. Measure and Mark: Accurately measure the dimensions you need for your PCB. Then, use a suitable marker to clearly mark the cutting lines on the board.
  3. Paper Underlay: Place a piece of paper under the PCB in your work area. This can help protect your work surface and collect any shavings.
  4. Cut: Slowly and steadily cut the board down to size. A variety of tools may be suitable for this step, such as:
    • PCB Scorer: This is a hand tool that scores the board, allowing it to be snapped along the scored line.
    • Shears/Guillotine: A shear designed for thin materials can cut the PCB.
    • Rotary Tool: A rotary tool with a cutting disk can be used, but may require more care and safety precautions.
    • Hand Saw: A fine-toothed saw can also be employed for cutting.
  5. Smoothing and Final Wipe: After cutting, use a file or sandpaper to smoothen the edges. Finally, give the board one more wipe to remove any remaining dust or particles.

Detailed Steps Explained

Preparation

  • Always work in a well-lit and well-ventilated area.
  • Use safety glasses to protect your eyes from any flying debris.
  • Consider wearing gloves to protect your hands.

Cutting Techniques

  • Scoring and Snapping:
    • Use a PCB scorer to create a deep score along the marked line.
    • Place the board with the score line along a straight edge and apply gentle pressure to snap the board.
    • Be careful to avoid uneven breaks.
  • Shears:
    • Ensure the board is fully inserted into the cutting area.
    • Apply pressure and cut the board using a steady motion.
  • Rotary Tool:
    • Use a cutting disk suitable for PCB material.
    • Cut slowly and carefully along the marked line.
    • Avoid excessive force to prevent overheating or breakage.
  • Hand Saw:
    • Use smooth, even strokes along the marked line.
    • Consider clamping the PCB for added stability.

Post-Cutting

  • File or sand down any rough edges to achieve a smooth finish.
  • Wipe the PCB with a clean cloth to remove dust or other particles.

Following these steps will help you cut your blank PCBs to the desired size safely and efficiently.

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