MatterHackers의 블로그 기사로 초보자들이 3D 프린터를 이해하는데 도움이 될 듯.
Hotend – All Metal vs PEEK/PTFE
By not using any plastic insulators in their construction, all metal hot ends are able to reach much higher temperatures and print a wider range of materials. However, they require active cooling.Hotend – Heat Sink / Hot End Fan
This ensures that heat does not travel up the plastic and melt it prematurely before it reaches the nozzle. This phenomenon is called heat creep and it causes jams, especially with PLA. This fan should be running whenever the hot end is warm.
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