In this page there is a content for the week 5 group assigment which is on 3D printing and scanning. The purpose was to test the design rules for the 3D printers we have.
I have made the design rules for printer in the lab.


Creality CR-200B
  1. Minimum Layer Height
  2. The CR-200B has a minimum layer height of 0.1mm, allowing for fine details in prints. However, for best results, 0.2mm is commonly used.

  3. Print Speed
  4. The printer supports speeds up to 100mm/s, but for higher quality, speeds between 40-60mm/s are recommended. Faster speeds may reduce accuracy.

  5. Overhang Angle
  6. The printer can typically handle overhangs up to 45-50° without supports. For steeper angles, cooling and support structures help improve results.

  7. Bridging Capability
  8. With proper cooling, the CR-200B can bridge 20-30mm without sagging, though tuning retraction and fan speed improves longer bridges.

  9. Extrusion Accuracy
  10. The direct drive extruder provides consistent filament flow, making it reliable for fine details. Regular E-step calibration ensures precise extrusion.

  11. Dimensional Accuracy
  12. Well-calibrated, the CR-200B achieves ±0.1mm accuracy for most prints. Tuning flow rate, steps/mm, and temperature improves precision.

  13. First Layer Adhesion
  14. With a heated bed (up to 100°C) and a Carborundum glass plate, adhesion is strong, but leveling is key for a smooth first layer.

  15. Cooling Efficiency
  16. The CR-200B has a dual cooling fans, which is effective for PLA but may need additional airflow for intricate details and overhangs in materials like PETG.

  17. Tolerance & Fit
  18. The printer handles basic press-fit and snap-fit tolerances, but fine-tuning XY compensation in slicer settings ensures better part fitting.

  19. Stringing & Retraction
  20. Default retraction settings (4-6mm at 30-40mm/s) work well for PLA. Stringing may occur at higher temperatures or with flexible filaments.

  21. Warping & Shrinkage
  22. The fully enclosed chamber helps reduce warping for ABS and PETG, but fine-tuning bed temperature and adhesion aids further.

  23. Material Compatibility
  24. Supports PLA, ABS, PETG, TPU, and some specialty filaments. The enclosed design makes it better for ABS compared to open-frame printers.

  25. Nozzle Clogging & Maintenance Needs
  26. The 0.4mm nozzle is reliable, but clogging may occur with flexible or carbon-fiber-filled filaments. Regular cleaning and temperature calibration help avoid issues.