FDM3D printer has the characteristics of fast entry, low cost, etc., the use of its creators players in the minority, but also because FDM printing has an inherent technical barrier, so most of the 3D model printed with FDM technology will have layer lines, next let me take a look at how to hide the FDM printing model layer lines it!
There will be the following types of laminar pattern in our printed models.
Cracks: mainly extrusion problems. The possibility of its one is the consumables, its two is the temperature, and its three is the feeding material.
Water ripples: Water ripples are caused by machine XY axis vibration, and the corners of the model will be more likely to appear. Generated by the following factors: printing speed is too fast, too high acceleration, mechanical vibration.
Step pattern: When the nozzle guide is not installed correctly or the cooling fan does not work or fails, resulting in the printed layer is not cooled in time, the new layer will be printed will be extruded and deformed. There are the following causes: model shaking, cooling is not timely, the machine movement components are not stable
Methods to eliminate the layer pattern
- Wet sanding
Smoothing the surface with sandpaper (400 to 1,000 grit, depending on the roughness of the print) is recommended for the following three reasons.Sanding relies on friction, which generates heat and causes prints to warp and fade; a small amount of water or oil will prevent this.It's easy to scratch plastic, and wet sanding helps minimize the risk.Sanding produces many particles that are a breathing hazard. When wet sanding, many particles bind to the liquid, keeping them out of the air.
- Apply wash resin
The wash resin is applied evenly to the surface, at which point the surface of the model becomes very smooth and can be washed directly after curing with an ultraviolet light, isn't that convenient! When you really want to make your 3D printed parts look professional, painting is the way to go. But as a handicapped person, how can I get the coloring perfect?
- Brush painting method
Mix the acrylic paint and alcohol in the ratio of 1:1.2 with a stirrer, and then filter it with 400 mesh gauze after mixing, which can filter out the tiny impurities and avoid affecting the coloring, and use the cross-cross method when coloring, that is, when the first layer is almost dry, put on the second layer of fresh paint, and the brush direction of the second layer is vertical to the first layer.
- Airbrush method
The same as the pen method, we still need to stir, filter, in order to avoid the clogging of the airbrush, we need to increase the proportion of alcohol to about 1.5, when spraying to adjust the spraying range of the airbrush, you can try spraying in the blank area, to the model spraying can be used multi-angle spraying, so that the model after spraying the color thickness will be more uniform.