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Editing Step 31 —

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Make sure you have your HotEnd in a place where it can get hot without damaging anything or setting any fires! Mounted on your printer or held with a spanner will work fine. Take care not to touch your hotend when it heats up.

Send the command M303 to autotune your PID. Remember to do it for both HotEnds. For more detailed instructions, check out Thomas Sanladerer's video guide for more information.