Individual Assignment

• Design and 3D print an object (small, few cm3, limited by printer time) that could not be made subtractively
• 3D scan an object (and optionally print it)

Pencil Holder Design in Fusion 360

Explain through the steps

1. Create the Base Cylinder:
   • Go to Solid → Create → Cylinder
   • Set Diameter = 70 mm, Height = 90 mm

2. Hollow the Cylinder:
   • Click Modify → Shell
   • Select the top face and set Thickness = 4 mm
3. Create a Slot on the Cylinder:
   • Click Solid → Create Sketch
   • Choose a side view
   • Use Slot (Center to Center Slot)
   • Set Slot height from cylinder base = 15mm ,Height = 80 mm, Width = 12 mm, Angle = 60°

4. Adjust Slot Position:
   • Click Dimensions
   • Select the bottom of the cylinder
   • Adjust slot height to 15 mm from the bottom

5. Cut the Slot on the Cylinder:
   • Use Extrude (Cut) tool
   • Set Cut Depth = 4 mm

6. Create a Circular Pattern for Slots:
   • Click Create → Pattern → Circular Pattern
   • Select Features as the pattern type
   • Choose the cylinder’s center axis
   • Set the required Quantity

7. Add Fillet to Smooth the Edges:
   • Click Modify → Fillet
   • Select the top circular edge
   • Set Fillet Radius = 2 mm

8. Finalizing for 3D Printing:
   • Ensure all sketches are fully constrained
   • Click on Export as STL for 3D printing

Steps for 3D Printing with Anycubic Kobra 2

1. Prepare the 3D Model

• Designed in Fusion 360.
• Download models from Thingiverse, Printables, or Cults3D.
• Save/export your design as an STL or OBJ file for 3d printing.

2. Slicing the Model

Use slicing software to convert the 3D model into G-code for the printer:

• Recommended slicer: Ultimaker Cura or PrusaSlicer.
• Used Slicer : Ultimaker Cura for my model
• Slicer steps are given in steps
• Steps:
  1. Import the STL file.
  2. Set up the printer profile for Anycubic Kobra 2.
  3. Configure print settings:
     • Layer height: 0.2 mm (standard) / 0.1 mm (high quality).
     • Infill density: 20% (for strength) / 10% (for faster prints).
     • Supports: Enable if needed for overhangs.
     • Temperature settings for various materials:
       • we used only PLA: 200°C (nozzle), 60°C (bed) for printing pencil holder
       • PETG: 230°C (nozzle), 70°C (bed)
       • ABS: 240°C (nozzle), 100°C (bed)
  4. Slice and save the G-code to a microSD card.

• Without support model takes time for print 3hrs 48min and with support it takes approx 5 hrs 39 min

3. Setting Up the Anycubic Kobra 2

• Power on the printer and insert the microSD card.
• Load filament:
  • Preheat the nozzle to 200°C for PLA.
  • Insert the filament and push until it extrudes.
• Automatic Bed Leveling:
  • Use LeviQ 2.0 Auto-Leveling for accurate first-layer adhesion.

4. Start Printing

• Select the file from the printer’s touchscreen.
• Monitor the first few layers to ensure proper adhesion.
• Adjust Z-offset if needed.
• Total time taken for printing approximately 6 hours

After printing with structure support inclination towards the object

5. Post-Processing

• Removed all supports in the pencil stand
• Finished lookside view and top view of object