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
- Minimum Layer Height 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.
- Print Speed The printer supports speeds up to 100mm/s, but for higher quality, speeds between 40-60mm/s are recommended. Faster speeds may reduce accuracy.
- Overhang Angle The printer can typically handle overhangs up to 45-50° without supports. For steeper angles, cooling and support structures help improve results.
- Bridging Capability With proper cooling, the CR-200B can bridge 20-30mm without sagging, though tuning retraction and fan speed improves longer bridges.
- Extrusion Accuracy The direct drive extruder provides consistent filament flow, making it reliable for fine details. Regular E-step calibration ensures precise extrusion.
- Dimensional Accuracy Well-calibrated, the CR-200B achieves ±0.1mm accuracy for most prints. Tuning flow rate, steps/mm, and temperature improves precision.
- First Layer Adhesion 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.
- Cooling Efficiency 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.
- Tolerance & Fit The printer handles basic press-fit and snap-fit tolerances, but fine-tuning XY compensation in slicer settings ensures better part fitting.
- Stringing & Retraction Default retraction settings (4-6mm at 30-40mm/s) work well for PLA. Stringing may occur at higher temperatures or with flexible filaments.
- Warping & Shrinkage The fully enclosed chamber helps reduce warping for ABS and PETG, but fine-tuning bed temperature and adhesion aids further.
- Material Compatibility Supports PLA, ABS, PETG, TPU, and some specialty filaments. The enclosed design makes it better for ABS compared to open-frame printers.
- Nozzle Clogging & Maintenance Needs 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.