Volcano settings? Blobs/lines of under extrusion

Discussion in 'Calibration, Help, and Troubleshooting' started by Kody Skiff, Aug 9, 2018.

  1. Kody Skiff

    Kody Skiff Member

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    I recently got my D-Bot set up with Volcano/Titan Aero combo. I've printed a few things and they all have the bump issue, but more concerning is there is this run after the bump where it looks to be under extruding. I've tried tweaking my coast (0-2mm) and extra restart (0 through -2mm) without much success. Anyone have any suggestions? Maybe there's a certain combo of the two that works better?
     

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  2. Old_Tafr

    Old_Tafr Well-Known Member

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  3. Kody Skiff

    Kody Skiff Member

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    Yeah I reposted it here after realizing the Volcano forum had no traffic and still had posts from a year ago on the front page.
     
  4. Spoon Unit

    Spoon Unit Well-Known Member

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    What nozzle diameter were you using for this print ?
     
  5. Spoon Unit

    Spoon Unit Well-Known Member

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    I thought I'd take on the volcano Benchy challenge. Lots to praise and some slicer/firmware shortcoming are, I think revealed, or I may just need to tune further. I made the following print with a 1.0mm nozzle, and therefore scaled up the Benchy to double size. I think it's designed with a 0.4 nozzle in mind, which would normally print at 0.48. I configured S3D for a manual 1.00mm nozzle to match the doubling of size of the model. Shoddy science really, but it made sense to me.

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  6. Old_Tafr

    Old_Tafr Well-Known Member

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    Could you post your S3D config file so that I can compare all the settings from my numerous (failed) attempts?
     
  7. Spoon Unit

    Spoon Unit Well-Known Member

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    Sure. It's far from a perfect result, but I think it's basically down to retraction tuning, or just physics with a volcano nozzle. I observe that the longer the move between a retraction and subsequent ejection, the more likely that the ejection will be incomplete. On short moves, the retraction settings work perfectly. I could probably nail this down if I had the time to investigate properly.

    I'll link the factory file as this should give you everything. Note that retraction is not configured in the slicer, but in the firmware in this case.

    https://www.dropbox.com/s/nqxdeni483v7ggo/VolcanoBenchy.factory?dl=0
     
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