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5 Printing
Use appropriate personal protective equipment when handling loose or unsintered
powder. Wear non-reactive nitrile gloves and safety glasses. Wear a respirator (N95
or better) if the occupational threshold limit value for airborne particle concentration
has been exceeded, if you are sensitive to dust or pollen, or you are concerned about
your respiratory health. Refer to section 3.2 Personal protective equipment (PPE) for
more information. Handle loose or unsintered powder only with adequate ventilation.
Avoid breathing mist/vapor/spray/dust. Do not eat, drink, smoke, or use personal
products when handling powder. Avoid contact with skin, eyes and clothing.
5.1 Operational environment
The operating temperature for the Fuse 1 is 20–27 °C (68–81 °F), with low ambient humidity.
For optimal printing, do not exceed these limits.
5.2 Designing for SLS
For detailed guidance and visual assistance, visit support.formlabs.com.
Selective Laser Sintering (SLS) enables the construction of parts without the use of support
structures often required with SLA or FDM printing platforms. This allows parts to be tightly
packed into a single print job, however there are some limitations that must be taken
into account.
Sintered powder is sensitive to sudden and drastic temperature changes. Allow the build
chamber to steadily and fully cool down after a print completes. Parts that are not allowed to
properly cool down will warp, and can become brittle and fail under load.
5.2.1 Printing specifications
Parameter Unit
Build volume (W × D × H) 16.5 × 16.5 × 30.0 cm (with radiused corners)
6.5 × 6.5 × 11.8 in (with radiused corners)
Maximum singular part dimensions (W × D × H) 15.75 × 15.75 × 29.97 cm
6.2 × 6.2 × 11.5 in
Layer thickness 110 μm
0.0043 in
Print initialization time Up to 60 min
5.2.2 Feature design guidelines
Feature type Minimum value Notes
Unsupported
wall thickness
0.6 mm/600 μm An unsupported wall is one that is connected to other
walls on fewer than two sides. An unsupported wall with a
thickness of 0.6 mm or less may warp or detach from the
model during printing. Thinner walls have reduced strength.
WARNING
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