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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.

When you heat up your HotEnd for the first time, make sure it does not heat above 245°C. Any hotter, and the PTFE lining will start to degrade.

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

Not all firmware support PID autotuning, and you may need to tune manually.

We recommend running two PID tunes for the V6, one now and one later at at normal printing temperatures, with filament in the hotend, sock attached, and with an active cooling fan on if you're planning on using one. This way your printer can finely tune its settings to match your real printing environment.