Selective Lazer Melting (SLM)
Selective Laser Melting or Metal Powder Bed Fusion is a 3D printing process which produces solid objects, using a thermal source to induce fusion between metal powder particles one layer at a time.
Most Powder Bed Fusion technologies employ mechanisms for adding powder as the object is being constructed, resulting in the final component being encased in the metal powder. The main variations in metal Powder Bed Fusion technologies come from the use of different energy sources; lasers or electron beams.
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Types of 3D Printing Technology: Direct Metal Laser Sintering (DMLS); Selective Laser Melting (SLM); Electron Beam Melting (EBM).
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Materials: Metal Powder: Aluminum, Stainless Steel, Titanium.
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Dimensional Accuracy: ±0.1 mm.
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Common Applications: Functional metal parts (aerospace and automotive); Medical; Dental.
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Strengths: Strongest, functional parts; Complex geometries.
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Weaknesses: Small build sizes; Highest price point of all technologies.
Selective Lazer Melting (SLM)
Selective Laser Melting or Metal Powder Bed Fusion is a 3D printing process which produces solid objects, using a thermal source to induce fusion between metal powder particles one layer at a time.
Most Powder Bed Fusion technologies employ mechanisms for adding powder as the object is being constructed, resulting in the final component being encased in the metal powder. The main variations in metal Powder Bed Fusion technologies come from the use of different energy sources; lasers or electron beams.
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Types of 3D Printing Technology: Direct Metal Laser Sintering (DMLS); Selective Laser Melting (SLM); Electron Beam Melting (EBM).
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Materials: Metal Powder: Aluminum, Stainless Steel, Titanium.
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Dimensional Accuracy: ±0.1 mm.
-
Common Applications: Functional metal parts (aerospace and automotive); Medical; Dental.
-
Strengths: Strongest, functional parts; Complex geometries.
-
Weaknesses: Small build sizes; Highest price point of all technologies.
Selective Lazer Melting (SLM)
Selective Laser Melting or Metal Powder Bed Fusion is a 3D printing process which produces solid objects, using a thermal source to induce fusion between metal powder particles one layer at a time.
Most Powder Bed Fusion technologies employ mechanisms for adding powder as the object is being constructed, resulting in the final component being encased in the metal powder. The main variations in metal Powder Bed Fusion technologies come from the use of different energy sources; lasers or electron beams.
-
Types of 3D Printing Technology: Direct Metal Laser Sintering (DMLS); Selective Laser Melting (SLM); Electron Beam Melting (EBM).
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Materials: Metal Powder: Aluminum, Stainless Steel, Titanium.
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Dimensional Accuracy: ±0.1 mm.
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Common Applications: Functional metal parts (aerospace and automotive); Medical; Dental.
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Strengths: Strongest, functional parts; Complex geometries.
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Weaknesses: Small build sizes; Highest price point of all technologies.
Looking at Digital Light Processing machines, these types of 3D printing technology are almost the same as SLA. The key difference is that DLP uses a digital light projector to flash a single image of each layer all at once (or multiple flashes for larger parts).
Because the projector is a digital screen, the image of each layer is composed of square pixels, resulting in a layer formed from small rectangular blocks called voxels.
DLP can achieve faster print times compared to SLA. That’s because an entire layer is exposed all at once, rather than tracing the cross-sectional area with the point of a laser.
Light is projected onto the resin using light-emitting diode (LED) screens or a UV light source (lamp) that is directed to the build surface by a Digital Micromirror Device (DMD).
A DMD is an array of micro-mirrors that control where light is projected and generate the light-pattern on the build surface.
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Types of 3D Printing Technology: Direct Light Processing (DLP).
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Materials: Photopolymer resin (Standard, Castable, Transparent, High Temperature).
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Dimensional Accuracy: ±0.5% (lower limit ±0.15 mm).
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Common Applications: Injection mold-like polymer prototypes; Jewelry (investment casting); Dental applications; Hearing aids.
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Strengths: Smooth surface finish; Fine feature details.
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Weaknesses: Brittle, not suitable for mechanical parts.
Digital Light Processing (DLP)
