1 45 degree rule, any protrusion over 45 degrees needs extra supporting materials or clever modeling skills to complete model printing, design your own supporting or connecting objects, and design them into your model. 2. Try to design your own printing base and avoid using auxiliary materials. Although the algorithm for support has been improved with the passage of time, the support material will still leave ugly marks on the model after being removed, and the removal process will be very time-consuming. Try to design your model without auxiliary materials, so that you can print it directly in 3D. 3. Know the details of your model. In your printer, there is a very important but often overlooked variable, that is line width. The line width is determined by the diameter of the printer nozzle. Most printers have a nozzle diameter of 0.4 mm or 0.5 mm. In fact, a circle drawn by a 3D printer will be twice the line width. 4. Adjust the printing direction according to the pressure source. When force is applied to the model, we should keep the model from being destroyed. Ensure your printing direction to reduce stress concentration in some areas. We can adjust the printing direction so that the printing line is perpendicular to the stress application. The same principle can also be applied to ABS resin, which is often used to print large models. During the printing process, these large models may crack along the Z axis due to cooling on the printing table. 5. Adjust the printing direction to obtain the best accuracy, and always take the feasible best resolution direction as the printing direction of the model. If necessary, the model can be cut into several pieces for printing and then reassembled. If you can do all these problems well in the printing process, I believe your 3d printer will have a high success rate in printing finished products. Practice makes perfect, which will be very helpful for beginners to know more technical knowledge. As an industrial innovation service platform, Keke.com often solves various problems for customers. We will summarize these experiences and post them on the website for your reference.