Objet30 User Guide 5 Using Objet Studio
DOC-34025 Rev. I 5-22
Manual Positioning
You can change the position of objects on the build tray—even if they were
inserted with the Orient Automatically option. Tools for changing the position of
objects are presented in "Manipulating Objects on the Tray" on page 5-24.
The orientation of models on the build tray affects how quickly and efficiently
they will be produced by the printer, where and how much Support material is
used, and whether or not model parts will have a glossy finish. Therefore, you
should consider a variety of factors when deciding how to place models on the
build tray, using the following positioning rules.
X-Y-Z Rule
This rule considers a model's outer dimensions.
➢ Since the print heads move back and forth along the X-axis, the printing
time along this axis is relatively short, compared to printing time along the
Y-axis and Z-axis. From this point of view, it is advisable to place the
object's largest dimension along the X-axis.
➢ Surfaces that come into contact with Support materials become matte.
➢ Since models are built up, on the Z-axis, in 15–36-micron layers (according
to the printing mode), it is very time-consuming to print a tall object. From
this point of view, it is advisable to place the object's smallest dimension
along the Z-axis.
➢ Since the print heads measure about 2 inches (5 centimeters) on the
Y-axis, models measuring less than this (on the Y-axis) are printed in one
pass. From this point of view, it is advisable to place the object's
intermediate dimension along the Y-axis.
Tall-Left Rule
This rule considers models where, after being orientated on the build tray
according to other considerations, one side is taller than the other.
➢ Since the print heads move along the X-axis from left to right, taller sections
on the right require the print heads to scan unnecessarily from the left until
reaching them. If, on the other hand, the taller sections are positioned on
the left of the build tray, the print heads only have to scan the model until
printing these sections—once the lower parts have been completed.
Therefore, you should position the taller side of the model, when possible,
on the left.
The following rules are based on the fact that Support material is not
required on the top of the printed model.
Recess-Up Rule
This rule considers models containing surface recesses.
➢ Recesses in the surface (like hollows, drill holes, etc.) should, when
possible, be positioned face-up.
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