I have a 3d20 printer. Currently, I encountered a problem: the printer heats up fine until it reaches 217 degrees, and then it started going back and forth between 216 degrees and 217 degrees. Does anyone know how to solve this?
Thx

Put some thermal paste on your heatbreak. The end that screws into the heat sink. If you havent gotten it yet, you will probably soon get a thermal runaway error, and it will ask you to reset printer. This happens because filament will jam up in the heatbreak.

Make sure to “hot tighten” every part of your hotend. You need proper heat transfer to ensure your thermistor can get an accurate reading.

Hope this help!

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Will do later after the thermal paste arrives, thanks!