PREPARATION OF THE 3D MODEL FOR PRINTING
Three-dimensional modeling and printing of 3d models have found their application in many branches of human activity and enjoy today mass demand.
Printing of 3d models
The creation of 3d models and the production of a prototype of the finished product is now a necessary stage when launching the production of a new product when preparing a presentation for the customer while performing functional testing of a new product.
The modern printing of 3d models is the process of creating a 3D object by specialized equipment (3d printer) according to a 3D model prepared in advance. Get a 3d object model allows 3D modeling or 3d scanning technology for objects.
Creating 3d models and printing them on a 3D printer is quite a complicated process, requiring professional knowledge and experience.
Printing and manufacturing of a prototype of a finished product includes the following steps.
3d modeling – building a product model in a professional graphics program.
Three-dimensional modeling includes the following sequence of actions:
- The creation of a primitive form;
- Study of small parts;
- Smoothing forms.
- Texturing is the process of applying textures to a model to make it realistic.
- Adjust lighting, surround scenes, select a viewpoint and adjust cameras, add additional effects.
- Preparing the 3D model for printing.
- Setting up a 3D printer.
- Printing 3d.
- Post-processing of the finished product.
Each stage has its own peculiarities and complexities. Let us consider in more detail how to prepare a 3D model for printing.
Process of preparation of the 3D model for printing
If you have a ready-made 3D model of the object or you plan to create it, then before you start printing it on a 3D printer, you will need to pre-prepare the model for printing.
AS better the 3D model is prepared, the better the finished result will be.
The preparation process can be divided into 10 necessary steps. Before, it is essential to consider them with such concepts.
Slicer program – software that turns your 3d model into a program code that will be read by a 3D printer.
Slasing – is the process of converting an object model into code.
First of all, the constructed model should be divided into layers, each of which consists of a fill and a perimeter. Moving the print head of the printer occurs on each subsequent layer along the XY axes, with the application of molten plastic. When one layer is printed, one layer above the Z axis is printed to print the next sheet, and so on.
10 stages to prepare 3d model for printing
- If the model consists of many details, then it is necessary to convert them into one.
- Flat base model. On the printer platform, the model with a flat base holds better. If the model suddenly peels off during the printing process, then the coordinate shift may occur, and the geometry of the 3d model base will break. If, on the other hand, there is no possibility of creating a flat base, or the plane of the base is small, then the model prints on the raft. However, there is a possibility that the raft can spoil the surface of the model, in connection with which it is better not to use it.
- Wall thickness. The walls of the model must be thicker than the nozzle of the printer, in addition, the walls must be equal to each other. If you specify too small a size, the printer will not be able to print them; the thickness of the walls should be the same as the diameter of the nozzle.
- Overhanging elements. To print any overhang, support is required. Therefore, it is better to reduce the number of overhanging factors to a minimum. This will shorten the time it takes to print and reduce the loss of consumables. Also, support may damage the surface of the finished model, which is in contact. It is possible to print an overhanging element if the angle of inclination is less than 70 degrees.
- The mechanical capabilities of your printer determine a lot, including the X-axis and Y-axis accuracy. The accuracy of the Z-axis model directly depends on the height of the layer. The height should be a multiple of the height of the sheet. Do not forget that when the material cools down, it settles down, which leads to a change in the dimensions of the finished object. The diameter of the holes in the model should be increased by 0.1-0.2 mm.
- Small parts. It is always tricky to print small pieces, so it is better not to make them more modest than the diameter of the nozzle itself. It is better to increase them by 2 times concerning the width of the nozzle, because as a result of post-processing, small parts can disappear entirely or become less noticeable.
- Narrow places. It is quite difficult to process narrow sections, this will require special equipment, a microdrill or chemicals. Therefore, it is better not to use them at all.
- Large models. When building large object models, you need to consider the size of the print area of your printer. If the object is too large, it is best to cut it into pieces, with the connections better prepared in advance, for example, the swallowtail.
- Position on the platform. The strength of the finished product depends directly on the location of the model. The load should be spread across layers, not along. Otherwise, the print layers may break.
- File format. As a rule, the slicers support only the STL-format, it is in this format that it is best to save your model.