Category Archives: Neanderthal FAQ

MLK LIBRARY (what the guy said in his presentation)

[The guy was James Kite – JH]

using the MLK system:

–> 20 day waiting period

–> STL files submitted to their online webform ( http://dclibrary.org/node/36592) have to be 12mb (can be larger if submitted in person with a usb)

–> up to their discretion to not print things if deemed inappropriate

–> machines they have: makerbot replicator 2 and cube x 10

–> maker bot replicator 2 scale limitations= 11.2 wide x 6.0 deep x 6.1 tall

–> cube x = roughly a 10-inch cube

things to consider:

–> can experiment/tamper with infill percentage, temperature that the machine prints at, print speed, etc

–> Z-GAP: distance between the print plate and the extruder (high z gap = more space between layers)

–> “INFILL PERCENTAGE” aka how dense is the filling material inside your object 0%= hollow ( if not hollow, the structure created inside is either diagonals or a honeycomb pattern)

–> RESOLUTION= layer thickness (standard is .25mm– the more detail per layer, the more possible “imperfections”, with a lower resolution you loose detail, but that results in an overall “smoother” finish.)

–> finished products can be altered in hot water or a deluded acetone bath

–> they use “makerware” to view/ alter  STL files for printing on the makerbot

–> “make it now” fx can result in interesting deformations

–> OVERHANG: objects w/ a lot of overhang can result in interesting deformations.  the machine can adapt to about a 45 degree increase per level without sagging.  there is an “auto support” fx on the software that adds a bit of material to help maintain the structure of the piece, but this can be turned off.

Doing a little research on file conversions…

Quick google search revealed this page which has a fairly recently updated list of 3d model file format conversion tools, with annotations.

What looked to me to be the most promising tool is MESHLAB…

What interested me most was the ability to both import and export models in numerous formats, including PLY, STL, OFF, OBJ, 3DS, COLLADA, VRML, DXF, GTS, plus several others. I tested the conversion fidelity with DAE and 3DS and found them satisfactory.

MESHLAB is open source [free for you]. I’ll test as time allows… or you guys can try it out and report back to the class.

At DCPL…

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at MLK Library

Monday, October 7, 2013 – 7:00pm

Get an overview of 3-D printing.

Explore the underlying processes and technology, survey some of the 3-D modeling and design software freely available for creating objects and discover valuable resources for 3-D printing on the Web.

Review the 3-D printing capability available to the public in the Digital Commons.

Export 123dCatch app Online Scan to Leonardo

1. Use 123dcatch app on phone or ipad device to create a scan.

2. Go to http://www.123dapp.com/catch. Log in with you 123dcatch login. Once logged in, drag the mouse over your name in the upper right and select Models and Projects. (This option will only allow you to open the wireframe version of your scan. To get the color 3D scan, use the 123dCatch shortcut on your desktop. Choose your scan. Go to File:Export Capture As..and then select .OBJ

3. Select the scan you would like to use. Save/Download the file using the Fabrication (.STL or .OBJ) option.

4. Save your new file in a place you will remember.

5. Now open Leonardo. Go to Menu:File:Import. Select your .STL or .OBJ file to be opened.

6. You will now see your scan on the Leonardo platform!