Aim:

To identify, fix, and refine design issues for better 3D print quality.

Requirements:

• Blender (for modeling)

• Slicer software (Cura or PrusaSlicer)

• Peer feedback sheet (simple form to note observations and suggestions)

Step-by-Step Process

Step 1: Self-Check Your Design

1. Open your Blender file and inspect your model closely.

2. Look for:

   • Thin parts or sharp edges.

   • Floating or disconnected pieces.

   • Unnecessary holes or excessive detail.

3. Use Mesh → Clean Up → Merge by Distance to fix geometry errors.

4. Use 3D Print Toolbox add-on (in Blender) to check for non-manifold edges.

Tip: Use real-world measurements (e.g., 5 mm = strong wall thickness for most small prints).

Step 2: Peer Review

1. Exchange your design with a classmate or show it to your teacher.

2. Ask them to load it into a slicer and simulate a print.

3. Use a feedback sheet to note:

   • Are supports needed?

   • Are some parts too thin?

   • Does it look balanced and stable?

4. Discuss suggestions for improvement.

Peer-to-peer design review mirrors how professional design teams work in the real world.

Step 3: Fix and Refine

1. Return to Blender and implement the feedback.

   • Thicken fragile areas.

   • Adjust overhang angles to <45°.

   • Simplify complex geometry.

2. Use Subdivision Surface Modifier or Bevel Tool to smooth edges.

3. Save your improved model with a new version name (e.g., “PhoneStand_v2.blend”).

Step 4: Re-Slice and Preview

1. Export again as .STL.

2. Open in slicer and preview the layers.

3. Check:

   • Does it have full bed contact?

   • Are supports generated where needed?

   • Is the infill sufficient (at least 20%)?

4. Adjust and re-slice if necessary.

Pro Tip: The preview shows potential weak zones. Always simulate before printing.

Step 5: Finalize and Save

1. Once satisfied, export your final .gcode file.

2. Label it clearly with version and date.

If a printer is available, print your model — observe and document any last-minute improvements.