Highly recommended - First print
As many people mentioned on the Internet, this is nearly mission impossible to have
a fully flat and level bed on such big printer. For the first prints, and before the bed
level is fully fixed and automated with a probe, you must print with a manually
levelled bed. My strategy was to concentrate on the front left part of the print bed and
print the first parts right above the levelling screw and spring. In order to make a first
decent print, I advise the following procedure:
a) If you’ve mounted the glass plate already, then remove it now as well as any
paper clip
b) Locate the bed levelling screw and thumb nut on the front left under the bed
c) Give a bit of a screw-in (clockwise) on the thumb nut, without exaggeration
d) Home your print head from the LCD menu
e) With the help of the LCD menus (or remotely via USB if you’ve plugged in a PC
with relevant software), move the Z axis to 0
f) Disable the stepper motors in the LCD menus and gently bring the hotend
above the front left bed levelling screw
g) Try to fit back the glass plate. If the nozzle is too low, then screw in the front left
thumb nut again until there is enough clearance to place back the glass plate
without scratching it with the nozzle
h) Screw in the other three thumb nuts in about the same amount in order to lower
the rest of the bed in the same proportions. This is not to achieve bed levelling,
this is only to avoid that the nozzle will scratch the glass plate in general. So
better to screw in more than less.
i) When the glass plate is in place and secured with paper clips, level the bed
carefully around the front left levelling screw with a piece of plain paper as you
would do on any other printer. Verify the levelling of the bed above the other 3
levelling screws and just make sure that this is about OK-ish, but avoid above
anything else that the nozzle touches the glass plate.
At this stage, it is safe to print parts in a 20cm x 20cm square around the front left
bed levelling screw. This is more than enough area to print the essential parts that
will enable you to safely level all the bed soon.
As many users soon discovered, due to the size of the printer, the vibrations tend to
rapidly loosen the bed levelling thumb screws. Not
only you need to recheck the level at the beginning
of every print, but also the bel level changes already
during the prints. For this reason I recommend that
you first ever print on this printer is a fix to this issue.
This will enable to print more parts more comfortably
until you have auto bed levelling. If you choose not
to go for auto bed levelling, this fix will enable you to
print well also without.
The first recommended print is to be found here:
https://www.thingiverse.com/thing:2462249
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