| 3D modelling and it's corporate big
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| | is a process developed by 3D Systems
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| brother of Solid Freeform Fabrication or
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| | where a laser strikes a bed of metal or
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| Rapid Prototyping began in the early 80's
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| | plastic powder, fusing portions of it
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| as a way to use machines to make objects
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| | into the required shape. The bed is
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| faster than a traditional modeler could.
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| | lowered, more powder added, and the laser
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| By using Computer Aided Design machines
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| | passes over it again. This process, which
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| such as pen plotters and then
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| | is the original basis of the LENS
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| variable-height plotters, developers soon
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| | process, can be used to create both fully
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| came up with the means to have a machine
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| | solid or partially solid metallic or
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| able to carve elements out of foam or
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| | polymer objects in a limited run
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| wood in multiple layers or levels, but it
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| | environment.Stereo Lithography uses a
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| was still one half or one side. A CAD
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| | laser striking a pool of photopolymer in
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| table could produce an object of up to
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| | a pattern defined by the CAD or STL file
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| 48"x48" with a depth of up to 4" - but
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| | data. Once the laser has finished it's
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| only 1 sided, so two of them would have
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| | pass, the platform lowers, immersing the
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| to be made for an 8" object, or many
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| | object under the surface of the
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| layers for a more detailed or larger
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| | photopolymer and the laser passes over
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| object.The first Stereo-Lithography
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| | again, slowly building up an object under
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| system was believed to have been
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| | the polymer. BaE uses Stereolithography
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| developed at Xerox labs in the mid 1980's
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| | to produce prototypes of equipment and
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| by a team of engineers who were
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| | parts extensively.These methods have a
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| experimenting with a way to fuse toner
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| | very fine accuracy, ranging from 0.01mm
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| into a more solid substrate. They
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| | for laminated Object Modelling down to
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| realised that by using a platform that
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| | 0.003mm for Stereolithography. This
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| moved only on the z axis or up and down
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| | enables models and objects to be made to
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| with a scanning laser that could traverse
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| | exacting specifications and allows for
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| across the entire plate on the x- and y-
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| | items such as jewellery mounts to be
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| axis they could harden a layer of waxy
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| | designed and then mass-produced in days
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| toner, then drop the platform down a tiny
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| | rather than weeks.For larger objects such
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| fraction, put new toner on, and do the
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| | as columns, airplane components, car body
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| process again, thus they could slowly
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| | panels, statues and the like - a
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| build up a form in 3 dimensions.Xerox was
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| | different method can be employed. 3D
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| pretty creative in the 70's and 80's - In
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| | routers or cutting machines have also
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| 1971, a team from Xerox came up with the
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| | been developed that have a cutting or
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| idea of putting a printhead assembly and
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| | routing blade set on a movable head that
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| scanning laser into a photocopier and
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| | can travel on all 3 axes and do very
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| created the first laser printer.
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| | complex carving down to a resolution of
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| So, realising that this solid
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| | around 0.1mm detail, depending on the
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| manufacturing process could be
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| | cutting or routing heads.The markets for
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| commercialised, they let the word out to
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| | Rapid Prototyping and Rapid Manufacturing
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| manufacturers and developers who could
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| | for hobbyists is growing. The machinery
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| put the idea to good use.In 1988, a team
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| | ranges in price from $3,500 up to over
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| led by S. Scott Crump developed a process
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| | $500,000 for some of the metal synthesis
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| called Fused Deposition Modelling. They
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| | equipment. This enables hobbyists and
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| went on to form the company Stratasys and
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| | people who need limited run products to
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| produced Rapid Prototyping machines that
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| | get them at a fraction of the cost of
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| used this technology to create physical
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| | previous methods such as moulded casting
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| objects from 3d models.Laminated Object
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| | or milling and engraving prototyping.Just
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| Manufacturing or LOM is a process
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| | do a search for Rapid Prototyping or
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| developed and commercialized by Heliosys,
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| | Solid Freeform Fabrication - there are
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| in which many layers of laminated paper
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| | plenty of companies out here ready to
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| are sealed together after they have been
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| | build your 3d object in 3 full dimensions
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| cut into shape, creating a 3d object
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| | so you can hold it in your hand.Tim
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| consisting of thousands or tens of
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| | Morrison is a founding member of is a
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| thousands of sheets tightly bonded
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| | technology company developed to bridge
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| together.Laser Engineered Net Shaping or
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| | the gap between virtual and real worlds
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| LENS is a recent process developed by
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| | in the realm of 3d. Our goal is to be
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| Sandia Labs where a laser is focussed
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| | able to produce a 3d image on the
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| onto a steady stream of metal particles
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| | computer and then produce it as a
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| sprayed into a pool of liquid metal. This
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| | physical object - no matter what the
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| process builds up a fully realised object
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| | complexity or detail involved. In this
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| with no hollow portions or any gaps. The
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| | vein, we keep track of anything in
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| metal is fully dense and the final part
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| | relation to 3D imagery that can bring our
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| is almost as strong as a milled item.
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| | goals closer, be it gaming consoles that
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| Optomec has licensed the LENS technology
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| | can do more than play games, hardware
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| into a Rapid Prototyping
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| | imaginng solutions, and software that can
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| machine.Selective Laser Sintering or SLS
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| | make our lives easier.
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