Visible textures are often dismissed as "standard," but at Justway, we treat them as variables to be controlled. This post breaks down the physics of surface artifacts and our proprietary mitigation strategies.
I. Minimizing the "Staircase Effect"
Layer lines, or the "staircase effect," occur due to the additive nature of the process. They are most prominent on shallow inclines and spherical geometries.
- Root Cause Analysis: When a CAD model is sliced, the vertical Z-resolution creates discrete steps. The shallower the angle (e.g., 10°–20°), the wider and more visible these steps become.
- Justway’s Optimization Protocol:
- Build Orientation Optimization: We don't just "hit print." Our engineers tilt parts at specific angles (typically 45°) to ensure that critical aesthetic surfaces are printed at a steeper gradient, effectively hiding the steps.
- Adaptive Layer Height: For high-end projects, we use thinner layers (down to 0.05mm) on curved sections while maintaining standard thickness on vertical walls to balance speed and quality.
- Advanced Anti-Aliasing: We utilize software algorithms that "blur" the laser intensity at the edges of each layer, resulting in a significantly smoother transition between steps.
2. Solving the "Edge Cupping" Effect
"Edge Cupping" refers to a slight lip or raised ridge that forms at the perimeter of a flat surface, particularly in resin-based (SLA/DLP) printing.
- Root Cause Analysis: This is caused by localized resin surface tension and light diffraction at the part-liquid interface. As the laser scans the boundary, the heat and light scatter slightly, causing over-curing at the very edge.
- Justway’s Technical Solution:
- XY Offset Compensation: We calibrate the slicing software to pull the laser path inward by a microscopic fraction (e.g., -0.05mm) to account for this growth.
- Border Power Tuning: We reduce the laser intensity at the boundaries of each layer. This ensures the edges are cured just enough for structural integrity without the excess "cupping" buildup.
- Scanning Sequence Adjustment: We prioritize "Infill-first, Border-last" scanning, which allows the bulk of the material to stabilize before the delicate edges are cured.
3. Why Software Logic Defines Quality
At Justway, we believe that quality is engineered in the software before it ever reaches the hardware. By mastering the physics of resin behavior and laser optics, we ensure that your parts arrive with the crisp edges and smooth finishes your project demands.
Return to Index:
Justway Technical Resource Center
