Digital Light Processing (DLP)

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.

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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Laminated Object Manufacturing (LOM)

Description Laminated object manufacturing is a rapid prototyping system developed by Helisys Inc. In it, layers of ad hesive-coated paper, plastic, or metal laminates are successively glued together and cut to shape with a knife or laser cutter. Like all 3D-printed objects, models made with a LOM system start out as CAD files . Before a model is printed, its CAD file must be converted to a format that a 3D printer can understand — usually STL or 3DS. The main components of the system are a feed mechanism that advances a sheet over a build platform, a heated roller to apply pressure to bond the sheet to the layer below, and a laser to cut the outline of the part in each sheet layer. Parts are produced by stacking, bonding, and cutting layers of adhesive-coated sheet material on top of the previous one. A laser cuts the outline of the part into each layer. After each cut is completed, the platform lowers by a depth equal to the sheet thickness (typically 0.002...

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Evaluation of 3D Printers

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