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12 Troubleshooting
3D printing is a complex activity and there are a lot ways things can go wrong, or not quite work as intended. This
troubleshooting section covers the most common issues, but it’s not comprehensive. If you don’t see anything
that describes the problem you’re having, please contact Fusion3 Support (see section 13).
12.1 Correct First Layer Height
First layer height refers to the height of the nozzle above the print bed when printing the first layer of your part.
This is important because an incorrect first layer height can result in a failed print later. Your F400, thanks to its
auto bed leveling system, takes most of the guesswork out of this, but it’s still possible that adjustment will be
needed.
The first layer can be too far away, correct, or too close as shown in the graphic below.
NOTE: Before making any adjustments, make sure your bed is level by running the Manual Bed Leveling steps in
section 9.3.2.
Too Far Away
In extreme cases the filament squirting out of the nozzle won’t stick to the bed at all. It will get dragged around
under the nozzle and eventually form a ball of filament on the print head. If you see this, cancel the print and
manually check your bed level.
In less extreme cases of too far away, you will see gaps between the traces laid down by the print head as shown
on the left of the graphic.
Too Close
In extreme cases the nozzle will be pressed so firmly against the bed that no plastic will come out. This usually
only happens if the bed leveling probe has been knocked out of alignment or damaged.
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