Model Orientation - Stratasys Objet24 User Manual

Using Objet Studio

Model Orientation

5–20
The orientation of models on the build tray affects how quickly and
efficiently they will be produced by the 3D 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 tray, using the following positioning rules.
X-Y-Z Rule
This rule considers a modelʹs 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
objectʹs largest dimension along the X‐axis.
Any surfaces that come into contact with support materials become
matte.
Since models are built up, on the Z‐axis, in 28‐micron layers, it is very
time‐consuming to print a tall object. From this point of view, it is
advisable to place the objectʹs 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 objectʹs
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 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.
Fine-Surface Rule
This rule considers models that have one side on which there are fine
details (like the keypad side of a telephone).
The side of the model containing fine details should, when possible, be
positioned face‐up. This results in a smooth finish.
DOC-34014 Rev. C