Over USB Connection
Use a printer control software to connect to your printer. Send the command M92 E<your number here>to your printer.
Then, send M500 to store your settings
Update your config file manually:
Update the following line with your new number: extruder.hotend.steps_per_mm. Upload your firmware as normal.
Insert a new line below
Insert a new line above
Indent current line
Unindent current line
Delete current line
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