Issue: Lines on models are often called grow lines associated with high resolution DLP 3D printing on non vertical surfaces.


Using DLP technology, the B9 Core Series projects and the entire layer at a time which achieves a finer level of resolution than laser-based systems. If you do not use the Smooth Surface Finish Selection prior to slicing, lines and/or swirls will appear on nonvertical surfaces.  Imagine building a curved edge using Lego blocks. The maximum size of the blocks is 30 or 50 microns dependent on the printer.  These small lines are removed as part of the post casting polishing process.


Laser diameter typically 140+μm.


Figure 1.   Lines on Non-Vertical section of the print

Figure 2.   Swirls on the rounded edge of the print


Please contact Support if you have additional questions.