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3D Printer Common Faults And Solutions(1)

Jan 21, 2021

Solutions to 3D printer vibration and loop texture

The loop is the wavy texture that appears on the surface of the printed part because of printer vibration. Usually, you will see this kind of texture where the extruder suddenly turns. Next, we will discuss the most common causes of loopbacks.

1. Printing is too fast. You are trying to print at a too fast speed. When the printer suddenly changes direction, the fast movement will cause more force, resulting in lingering vibration. If you think the printer is printing too fast, you can try to reduce the printing speed. Adjust the printing speed in Basic-Speed/Temperature-Printing Speed (mm/s), usually it can be set to 50mm/s.

2. Mechanical failure. If other methods cannot solve the loopback problem, it may be the cause of the machine. For example, if the screw is loose or the bracket is damaged, it will cause vibration. When printing, observe the 3D printer carefully to see where the vibration is generated. By the way, rub a layer of lubricating oil on the screw rod and check if the platform is loose. If it is loose, you can adjust the eccentric nut under the platform and tighten it.

How to solve the linear texture on the side of 3D printed parts

The 3D print consists of hundreds of layers, and if everything is normal, these layers will look like an overall smooth surface. If there is a problem with only one layer, it will be clearly found on the outer surface of the print. These incorrect layers will cause the appearance of the print to look like a linear texture. Usually this kind of blemish will appear periodically, which also means that the lines appear regularly (for example, once every 15 layers). Next, we will discuss several common causes.

1. The extrusion is unstable. The most likely cause of this problem is the poor quality of the consumables. If the consumables have a large tolerance, you will find this change on the outer wall of the print. For example, if the diameter of your entire roll of consumables only fluctuates by 5%, the width of the plastic line extruded from the nozzle will change by 0.05mm. This extra amount of extrusion will cause the corresponding layer to be wider than the other layers, and finally you will see a line on the outer wall of the print. In order to produce a smooth surface, your printer needs higher quality consumables.

2. Temperature fluctuations. Most 3D printers use pins to adjust the temperature of the extruder. If the pins are not coordinated, the temperature of the extruder will fluctuate over time. In view of the principle of pin control, such fluctuations will occur frequently, which means that the temperature will fluctuate like a sine wave. When the temperature is too high, the smoothness of plastic extrusion is different than when it is colder. This will make the layers extruded by the 3D printer different, resulting in textures on the outer surface of the print. A coordinated 3D printer should be able to control the temperature of the extruder within ±5°C. The heating block of the CR-2020 3D printer is wrapped with thermal insulation cotton, which can ensure the stability of the temperature.