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why is second extruder heated when it is not used?

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Posted · why is second extruder heated when it is not used?


was just wondering... why is it that whenever I start a job with only extruder 1 used the heating program starts and also heats up extruder 2 (to about 170degr.)?

generally I wouldn't mind but since extruder 2 is the BB core with pva it doesn't improve the quality of the pva when it's heated unnecessary.

any one has a thought on this?

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    Posted · why is second extruder heated when it is not used?

    Do you use the recommended settings or do you have some customization?

    If you want to make sure it is not heated, remove the PVA from printcore 2 with the assistent so the printer has "no material" in printcore 2. Then the second printcore should not be heated, not even during active leveling.

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    Posted · why is second extruder heated when it is not used?

    The second nozzle heating up is not desirable but can have multiple reasons:

    - Which Cura and firmware versions are you using? A few improvements have been made here in the last year. Cura 2.6 with firmware 3.7 doesn't do this on my machine.

    - When active leveling is enabled, then the second nozzle will always be heated to melt filament that's possibly sticking out and corrupting the measurement.

    I created a feature request to skip leveling the second nozzle when only printing with a single material but can't promise on this being implemented.

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