The plastic extruded from the extruder is at least 190 to 240 degrees Celsius. When plastic is still hot, it is still soft and can be easily molded into different shapes. Then, as it cools, it quickly becomes a solid and takes shape. You need to have a proper balance between temperature and cooling so that the plastic can flow out of the nozzle smoothly, but solidify quickly to achieve the accuracy of print size. If the balance is not achieved, you will encounter some printing quality problems. The appearance of the printed parts is not accurate, which is different from what you expect. As shown in the figure, the extruded wire at the top of the pyramid failed to cool and shape as soon as possible. In the following chapters, we will check several common overheating conditions and how to avoid them.

The most common cause of overheating is that the plastic does not cool in time. When the cooling is slow, the plastic can easily change shape. For multiple plastics, it is better to cool the printed layers quickly to prevent them from deforming. If you have a cooling fan on your printer, try increasing the wind power of the fan to make the plastic cool faster. The fan speed can be adjusted. A fan speed percentage will be displayed in the upper corner of the screen. The speed can be adjusted in the control during printing. The fastest speed is 255. Generally, the fan will be turned on at full speed after the bottom layer of the model is printed.

If you've used a cooling fan but still have problems, you may need to try to lower the printing temperature. If the plastic is extruded from the nozzle at a lower temperature, it may solidify faster. Try to reduce the printing temperature by 5 to 10 degrees to see the effect. The printing temperature of PLA is generally 190-210. If the temperature you set is too high, the consumables will melt completely from the nozzle, and then they will easily deform when they are piled up. The printing temperature of consumables from different manufacturers is different. You need to test the most suitable printing temperature, and the right one is the best.

If you print each layer very fast, you may not have enough time to let the layer cool down properly and start printing new layers on it. This is particularly important when printing small models because each layer has very little time to print. Even with cooling fans, for these very small layers, you still need to slow down the printing speed to make sure there is enough time for the layers to solidify. Fortunately, there is a minimum printing time setting for each layer in Cura advanced. If the printing time of each layer is very small, you can set the printing time a little longer. This setting item is used to automatically reduce the speed when printing small layers, so as to ensure that they have enough time to cool and solidify when printing the next layer. For example, if you allow the software to adjust the printing speed when the printing time is less than 10 seconds, the program will automatically reduce the printing speed for these small layers. This is a key feature for solving high heat problems.

If you have tried the above three methods, but still have problems in cooling, there is another method, you can try it. Make a copy of the model you want to print, or import another model that can be printed at the same time. By printing two models at the same time, you can provide more cooling time for each model. The nozzle will need to be moved to a different location to print the second model, which provides an opportunity for the first model to cool down. This is very simple, but it is a very effective strategy to solve the problem of overheating.