3D printing is currently the most public attention and one of the most vital technologies in the field of rapid prototyping, 3D printing technology for the product to shorten the development cycle and reduce the cost of research and development. In practical applications, there are many people who have accuracy requirements for the model, then, in the 3D printing process, how to improve the accuracy of the 3D printing model? Pay attention to the following points, you can also print a high precision model.
1, the accuracy of the 3D printing machine itself
When buying a 3D printer, we must first understand the printing accuracy of the machine, the manufacturing and assembly accuracy of the 3D printing machine and the vibration during operation will affect the 3D printing accuracy. the accuracy of the 3D printer depends on whether the mechanical part of the walking part is accurate and reasonable.
2, layering thickness
Here the layered thickness is also the layer thickness / layer height when slicing, because each layer has a certain thickness, will produce obvious step pattern on the surface of the formed entity (the higher the layer thickness, the more obvious), will directly affect the dimensional error and surface roughness of the formed entity. For the FDM process, this is a principle error, to completely eliminate the step is impossible, intelligent by setting a smaller layer thickness to reduce the step effect.
Nozzle temperature determines the bonding performance, stacking performance, wire flow and extrusion line width of the material. Therefore, the nozzle temperature should not be too low or too high. Too low, the viscosity of the material increases, the extrusion speed is slow; too high, the material is biased toward the liquid state, the viscosity coefficient decreases, the mobility is enhanced, the extrusion is too fast and can not form a precisely controlled filament. Therefore, when setting the temperature of the nozzle, it should be selected within a certain range according to the characteristics of the selected wire to ensure that the extruded wire is in a molten flow state.
4、Type of consumables
3d printer using different types of materials or the same material quality is different, the final model played out glossy is also very different, the user only use the most appropriate material to make your 3d printer to play the most perfect model.
5, nozzle diameter
The diameter of the nozzle also determines the width of the extruded wire, which will affect the accuracy of the finished product. We all know that 3D printing is stacked by layers to construct objects. Therefore, the layer thickness setting also affects the roughness of the finished product: using a large diameter nozzle, that layer thickness is thicker, although its 3D printing speed is faster, but the finished product will be rougher; on the contrary, using a small diameter nozzle, 3D printing process time although increased, but the finished product is more delicate. Nozzle diameter is generally only 0.2mm or 0.3mm or 0.4mm three, the reason why it can not be smaller, is due to the non-Newtonian fluid flow nature of the supplies, the diameter is too small will lead to excessive resistance to flow.