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I'm trying to make a printer that will have a second extruder as backup for when the primary one clogs or runs out of filament. It is an ongoing project I'm doing to make a 3D printer as reliable as possible. How could you implement this.

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    $\begingroup$ This question should be reworded to clearly ask specific points, opinions are not allowed on this site, see help section. $\endgroup$
    – FarO
    Oct 21, 2020 at 8:32
  • $\begingroup$ @FarO Indeed, I initially overlooked the part in the body, I've reworded the body as the question (use of a spare tool) has value to retain for the future. $\endgroup$
    – 0scar
    Oct 21, 2020 at 12:30

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You could use a "filament runout sensor" and combine it with a "filament running sensor". If either fails the controller needs to be notified by a signal. If you configure the Configuration.h filament runout setup such that it doesn't call M600 but instead a series of codes to park tool 0, activate tool 1, home tool 1, prime tool 1, and commence printing, you are near a solution.

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  • $\begingroup$ Thanks, man. Appreciate it. Btw what are your thoughts on a system that can automatically clear a ruined print from the build platform and start reprinting again? $\endgroup$ Oct 20, 2020 at 23:01
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    $\begingroup$ @FarazAhmed Please look into Blackbelt 3D printer. 😃 $\endgroup$
    – 0scar
    Oct 21, 2020 at 4:32

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