SLA-DLP PRINTERS

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SLA-DLP PRINTERS

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Stereolithography is the process by which a uniquely designed 3D printing machine, called a stereolithograph apparatus (SLA) converts liquid plastic into solid objects

SLA technology uses light to turn liquid resin into a solid object, one layer at a time.

Both laser-based SLA and DLP are types of stereolithography, but drawing

a layer with lasers can be completely different from projecting layers as a

flat image.

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Material

Resin

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29/09/19

T.C Atılım Üniversitesi Mekatronik Mühendisliği Bölümü MeMÖK 2010 5

TYPES

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Mechanism

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Quality

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With DLP 3D printers, there’s a direct trade-off between resolution and build volume. The resolution depends on the projector, which defines the number of pixels/voxels available.

If one moves the projector closer to the optical window, the pixels get smaller, which increases the resolution, but limits the available build area.

As a result, DLP 3D printers are generally optimized for

specific use cases. Some have a smaller build volume and

offer high resolution to produce small or vice versa.

(10)

SLA systems are inherently more scalable, since an SLA 3D printer’s build volume is completely independent of the

resolution of the print.

A single print can be any size and any resolution at any location within the build area.

This makes it possible to 3D print large parts at high resolution

or a large batch of detailed small parts to increase throughput

with the same machine.

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Voxel

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The rectangular shape of voxels makes curved edges appear stepped.

Removing the appearance of voxel and layer lines requires post- processing, such as sanding.

Why do voxels happen?

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Why do voxels happen?

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Pros & Cons

SLA

PROS CONS Better Resolution Slower

Bigger Volume Much moving parts

Less sustainable

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Pros & Cons

DLP

PROS CONS

Faster Voxel problem

Less Complex Less Resolution

Cheaper Limited Volume

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Final processing

Removing support

Alcohol bath

(17)

SLA-DLP PRINTERS

SLA-DLP PRINTERS

Stereolithography is the process by which a uniquely designed 3D printing machine, called a stereolithograph apparatus (SLA) converts liquid plastic into solid objects

SLA technology uses light to turn liquid resin into a solid object, one layer at a time.

Both laser-based SLA and DLP are types of stereolithography, but drawing

a layer with lasers can be completely different from projecting layers as a

flat image.

Material

Resin

TYPES

Mechanism

Quality

With DLP 3D printers, there’s a direct trade-off between resolution and build volume. The resolution depends on the projector, which defines the number of pixels/voxels available.

If one moves the projector closer to the optical window, the pixels get smaller, which increases the resolution, but limits the available build area.

As a result, DLP 3D printers are generally optimized for

specific use cases. Some have a smaller build volume and

offer high resolution to produce small or vice versa.

SLA systems are inherently more scalable, since an SLA 3D printer’s build volume is completely independent of the

resolution of the print.

A single print can be any size and any resolution at any location within the build area.

This makes it possible to 3D print large parts at high resolution

or a large batch of detailed small parts to increase throughput

with the same machine.

Voxel

The rectangular shape of voxels makes curved edges appear stepped.

Removing the appearance of voxel and layer lines requires post- processing, such as sanding.

Why do voxels happen?

Why do voxels happen?

Pros & Cons

SLA

PROS CONS Better Resolution Slower

Bigger Volume Much moving parts

Less sustainable

Pros & Cons

DLP

PROS CONS

Faster Voxel problem

Less Complex Less Resolution

Cheaper Limited Volume

Final processing

Removing support

Alcohol bath

Final processing

Uv cure Light sanding &

polishing