Aim:
To 3D print and test a functional item designed for personal or everyday use.
Requirements:
- A 3D printer (FDM type recommended)
- Your finalized .STL and sliced .gcode file
- Notebook or digital journal for reflection
- Measuring scale (optional, for dimensional testing)
Step-by-Step Process
Step 1: Select a Functional Design
- Choose a design that serves a simple, useful purpose — for example:
- Pen or pencil holder
- Mobile stand
- Keychain
- Cable organizer
- Bookmark or name tag
- Ensure it’s your final refined version from Lesson 5.
Step 2: Prepare the Printer
- Turn on the 3D printer and load PLA or PETG filament.
- Level the printer bed (check bed leveling guide).
- Preheat the printer nozzle and bed to appropriate temperatures:
- Nozzle: 200–210°C
- Bed: 60°C (for PLA)
- Insert the SD card or USB containing your .gcode file.
Step 3: Print the Model
- Start the print job and monitor the first few layers.
- Observe if:
- The print sticks properly to the bed.
- The filament is extruding evenly.
- If needed, pause and adjust print settings or re-level the bed.
- Wait for the print to complete, then carefully remove your model using a scraper.
Tip: Always handle freshly printed models carefully — the nozzle and bed stay hot for a while.
Step 4: Test Your Model
- Check for any visible defects: cracks, warping, or rough layers.
- Test its function — for example:
- Does the pen holder stand straight and fit pens comfortably?
- Does the phone stand hold your phone without slipping?
- Does the keychain ring fit well and feel sturdy?
- Note down your observations in a table:
| Aspect | Observation | Improvement Idea |
| Stability | Holds phone but slightly wobbly | Increase base thickness |
| Strength | Feels strong | No change needed |
| Surface | Slightly rough texture | Sand and reprint with slower speed |
Step 5: Reflection
Write a short reflection (100–150 words) in your notebook:
“My design was a mobile stand. It printed successfully and held my phone well. However, the back support was slightly thin, causing it to bend under weight. Next time, I would make the support thicker and increase the base angle. I learned that testing is essential for improving real-world performance.”
Step 6: Improve and Reprint (Optional)
If time and resources allow:
- Make the necessary design changes in Blender.
- Reprint the updated version.
- Compare Version 1 and Version 2 for improvements in strength and usability.