User's Manual Part 2

CHAPTER 8. OPERATIONAL TIPS 208
consider pr inting multiple objects: the time the printer spends
movi n g to another section of the buil d plate, and then printing a
layer of another object, is likely to suffice to let the first object’s
layer cool.
See Section 4.6.1 and Section 4.6.1.1 for a discussion of adding
an object or objects to the build plate.
8.1.3 Avoid straight-line extrusion runs through the
center of the build plate
The Polar3D printer’s underlying polar coordinates architec-
ture means that in order to perform a “straight-line” extrusion
through the very center of the build plate,theprintermust
pause extruding when it reaches the center of the build plate
and perform a 180° spin, before resuming printing. Th i s makes
this a point where if your printer’s calibration is less than per-
fect, it may be more apparent here (straight-line extrusi on runs
through the center point of the build plate) than anywhere else:
with l ess than perfect callibration, you might see a jog in t h e
output, a bit of a blob at the exact center, a slight bend in the
line, etc.
So if the appearance of an exact, smooth, straight line is an
important part of the object you are printing, try to position
the object so that (visible) such straight lines of material don’t
have to go through the exact center of the build plate – or else
be very careful with your callibration.