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Beat the DLP Printer! Autodesk Shows You How to Achieve Sub-Pixel Resolution, Manipulating Voxels with Luminosity

by • August 5, 2016 • No Comments

the ember

The Autodesk Ember DLP 3D Printer setup.

If you are a 3D printing enthusiast bent on producing objects that are incredibly accurate and with unsurpassed resolution, you’ve most likely explored 3D printing systemes such as Stereolithography (SL) and Digital Light Processing (DLP). Whilst both via photopolymers, SL innovation showcases a laser as its light source and DLP generally uses a thing additional traditional like an arc lamp or projector.

Often idea to be a bit additional inexpensive
as it uses less resin, the innovation of DLP printing has turn it intod quite a bit of progress. From hardware that prints with wax to DLP 3D printing devices turn it intod for the jewelry and dental industries, versions abound. But when Autodesk comes up with a thing new—such as the aptitude to obtain sub-pixel resolution in DLP printing—that’s worth checking out in terms of your own equipment, as well as finding out what’s new with the Ember DLP 3D Printer, innovation we’ve reported on most not long ago as it was utilized by the Smithsonian to replicate ancient Chinese statues.

Steve Kranz of Autodesk not long ago turn it intod a video guide to show us all how to complete sub-pixel resolution in grayscale images, fundamentally enabling you to anti-alias your DLP printing device, as you dabble in the satisfactory art of manipulating pixels. This technique allows for you to manufacture the most of your images—without purchasing or enhancing hardware. This is effortless adequate that most should be able-bodied to tweak their DLP printing devices, and you may see this as a standard version soon.

Starting with the voxel, Kranz reminds us therein lies the foundation of 3D printing:

“The resolution of the printing device is desatisfactoryd by the pixel dimensions of the projected image and the layer thickness of the vertical way. So a print of a 3D version is an approximation of most, most small cubic voxels. In a single layer, the location of voxels is set by the projected image.”

autodeskk logoSo, in 3D printing if a voxel is white, the printing device’s projector cures and solidifies the print; if the voxel is black, the projector does nothing and the resin stays put. No print is turn it intod.

“So far, we’ve been assuming that our images are turn it intod of either purely black or purely white pixels,” says Kranz. “But what takes place with a gray pixel? Would it print half a voxel? If so, that half?”

And so, the conversation grows additional informative as we go on to consider pixels and voxels, the indivisible atoms of DLP printing. Richard Green, part of the Ember team, performed an experiment, ‘How a Voxel Grows,’ to delve additional into this realm of blocks, colors, and what the DLP printing device can do when pushed a bit additional. He turn it intod a solid row of pixels, followed by a solid row of voxels, in various shades of dark gray to bright white. The outcome was that dark gray pixels, predictably, do not print.

“At a sure point, a hemispheric bump forms and is attached to the previous layer,” states Kranz. “As the pixels get brighter, the voxels grow wider and slightly taller.”


Voxels – theoretically, the indivisible atoms of the DLP printing device.

What this means in the end is that quite just, the dimensions of a voxel can be regulated by ‘varying luminosity.’

“This allows for us to do a few quite rad tricks,” says Kranz.


In via grayscale and additional harsh voxel setups, you will find that you can turn it into additional resolution than the rules should allow, in essence. Kranz is teaching you how to beat the 3D printing device and complete additional high end. For those creating vertical slopes, this is especially helpful, allow you to add a exact draft angle—just by adding a 50 micron wide pixel.

This in addition works for creating additional subtle slopes generally seen in the typical stairstep pattern; in via grayscale you get satisfactoryr resolution and a flatter slope. The same system in addition works with shallow, horizontal slopes.

“These grayscale tricks don’t magically allow you to print sub-pixel showcases,” he says, “but they do allow you to reduce the layer lines and artifacts you see in a few other 3D prints.”

If you are interested in finding out additional of this project, see the video at a lower place, check out the Reddit page for other details, and see the Instructable-bodied of Richard Green, that actually shows you how to manufacture a film of a voxel’s growth. Are you attempting to get higher resolution of a DLP 3D Printer? Discuss additional over in the Sub-Pixel Resolution of DLP 3D Printer forum over at 3DPB.com.

[Source: Reddit; Hackaday / Images: screenshots of Autodesk video]

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