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April 20 2014

andrelf
22:34
5554 6715
Reposted frombiru biru viagem gem
andrelf
22:27
the laser dot will be mine!
Reposted fromshallow shallow viaAndi Andi
andrelf
22:12
7287 a86b
This Norwegian Engineer Is Creating Some Creepy Transformer-Like Robots…

Click below to see these crazy robots in action...  http://www.industrytap.com/norwegian-engineer-creating-creepy-transformer-like-robots/19478
Reposted fromdebsy91 debsy91 viaAndi Andi

March 29 2014

andrelf
21:49

March 23 2014

20:36

Jewelry Box

Bookmatched curly cherry jewelry box with turqouise stone inlay. Finished with a scraper, Watco Natural Danish Oil, 2lb cut of Shellac, and Renaissance Wax.

20140214_080830

 

20140214_073022

 

20140214_065558

 

20140215_184951

 

20140307_155247

 

20140307_155302

 

20140307_155323

Reposted fromhackerspaces hackerspaces

March 13 2014

22:33
7387 fc8b

Mechanical Ripple Effect

Reposted fromOpticoverload Opticoverload viasm0k1nggnu sm0k1nggnu
andrelf
20:50
8597 e3d9 500
Ob der Kurs was bringt?

March 07 2014

andrelf
23:04
2406 fcbf
Reposted fromoktawka oktawka viaAndi Andi

February 13 2014

21:16

Laser cut Voronoi boxes

Voronoi shadows
Given a set of points, the Voronoi tessellation creates a set of convex polygons that each contain one point. They can also be used to randomly generate unique art pieces that cast shifting, lace-like shadows. This one was really quite beautiful until the candle burned through…

Read on for some scripts to make your own and tips for laser cutting them.

Making the box outline

Lace box
The outline of the boxes can be generated with an online tool like MakerCase or my boxer script. For instance, to generate the above 40x40x40mm box (thing:39415) with 3mm thick plywood, using a laser kerf of 1/8mm:

./boxer \
  --thickness 3
  --width 40 \
  --height 40 \
  --length 40 \
  --kerf 0.125 \
  > box-40mm.svg

Larger parameters for --kerf make for a tighter fit. I recommend cutting a small box to verify the kerf settings for your laser cutter and material.

Creating the lace patterns

Large lace cube
The technique scales from small boxes up to fairly large ones, although the parameters to lace-maker will need to be tweaked to ensure good density of points. Also be sure to keep in mind that the tabs from the other faces will intrude into each face, so the lace pattern can’t go all the way from edge to edge. In general I’ve found that leaving the thickness of the material plus 2 to 5mm of space on each side gives good results — this allows clearance for the tab material and some material for the structural edge. The sample box was 40mm on a side, so the lace pattern here is 40-6*2=28mm square.

./lace-maker \
  -x 28 \
  -y 28 \
  -w 1 \
  -n 20 \
  > lace1.svg

The -w parameter is the trace thicnkess in mm — for wood I’ve typically used a minimum width of 1 to 2mm for the traces. Acrylic seems to be ok with thiner traces if you desire it, although it does become quite weak and flexible.

Random boxes
You’ll need to generate six lace svg files if you want each face to be unique. If you’re making a rectangular shape, be sure to generate two of each of the combination of edge lengths.

Sometimes you will get an error message “Bad polygons?“. If so, try reducing the number of polygons (the -n parameter) or re-running. Since the points are randomly chosen each run there is a chance that the current set might not be possible to fit with the current trace width.

Circle maker
If you prefer other space filling tesslations, I’ve also written circle-maker. It is a very different feel from the convex polygons.

Arrange and laser cut

Lace cube aftermath
Finally, load the box outline into Inkscape or Illustrator and then import each of the six lace files. Place them in the center of the faces and if you can designate a cut-order for the vectors, set it to cut the interior polygons first and then cut the box outline.

Be sure to use enough power to cut through — the lace panels aren’t very strong and you might snap them if you need to use force to finish the job. After a successful cut there will be a huge number of small voronoi polygons on the laser bed. Don’t forget to to vacuum up the detritus before you post photos of your awesome art projects!

If you need to learn how to use the laser, NYC Resistor offers classes on operating the laser cutter. Once you’ve taken the class you can come by on our open nights to work on your own projects.

Reposted fromhackerspaces hackerspaces

February 03 2014

andrelf
21:16
8439 80fc
Reposted fromscorpix scorpix viasm0k1nggnu sm0k1nggnu
21:03
3351 023e
Reposted fromgiantfailure giantfailure viasm0k1nggnu sm0k1nggnu
andrelf
20:43
Reposted fromvolldost volldost viaAndi Andi

January 16 2014

andrelf
22:11

[heute: taz löst urheberrechtsdebatte]

(...) Wer als Vermittler zwischen Eigentümer und Käufer von Wohnraum auftritt, darf ein Honorar von maximal 6 Prozent (plus Mehrwertsteuer) des Kaufpreises verlangen, womit auch sämtliche Unkosten und Vorleistungen abgegolten sind. Ohne Zweifel, in einem unregulierten Markt könnten Makler sehr viel höhere Honorare realisieren. Aber trotz dieser Deckelung ist der Berufsstand der Makler nicht von Armut bedroht. Und würde man dieses Markthemmnis wegliberalisieren, käme es zwar zu einer explosionsartigen Vermehrung von Makleragenturen, aber nicht zum Bau einer einzigen zusätzlichen Wohnung.

Mein Vorschlag ist, diese bewährte und gerechte Honorarbegrenzung auf sämtliche Geschäftsformen, die wie Immobilienmakler nur mit Rechtstiteln und dem immateriellen Informationstransfer handeln, zu verallgemeinern. Also auch bei jeder Verwertung von geistigem Eigentum sollten zukünftig nur noch höchstens 6 Prozent zu dem Geldbetrag, der vom Endnutzer an den tatsächlichen Schöpfer eines Werks bezahlt wird, als Honorar für sämtliche dazwischenliegenden Dienstleister aufgeschlagen werden dürfen. Oder umgekehrt: Wann immer ein Rechteverwerter hundert Euro einnimmt, muss er gut 94 Euro an den tatsächlichen Urheber abführen, der das geistige Eigentum an seinem Werk naturgemäß unveräußerlich besitzt und nur konkrete Nutzungsrechte vermarkten kann. 

Niemand, der für eine Verbesserung der wirtschaftlichen Lage von Autoren, Künstlern und Erfindern eintritt, wird diesem Vorschlag widersprechen können, ohne in den Verdacht zu geraten, in Wirklichkeit ganz andere, der Kreativwirtschaft fremde Interessen zu verfolgen.

(...)

Sechs Prozent plus Steuern - ULRICH KÜHNE auf taz.de
Reposted fromumruehren umruehren viagem gem

January 02 2014

andrelf
19:46
3D-printing machine that uses sunlight and sand to make glass objects in the desert

via Dezeen » Blog Archive » The Solar Sinter by Markus Kayser
Reposted fromschub schub
andrelf
07:01

January 01 2014

andrelf
15:55
Die Lampe in der Werkstatt im Netz39 hat jetzt auch einen Hackerspace würdigen Lampenschirm. Geodesic dome 5V.
Reposted bynetz39gemn0gsofias

December 29 2013

andrelf
18:50
East German Ampelmännchen - cookie cutter
Reposted bynetz39bastinat0r

December 23 2013

andrelf
13:20
Assembling a wooden 5V geodesic dome (with cat content)
Reposted fromnetz39 netz39

December 17 2013

andrelf
21:48
5567 9c86
True story.
Reposted fromathomm athomm viakeksmann keksmann

December 13 2013

15:34

CT Scan Processing into 3D printable STL files

CT Scan with lower threshold swept

CT Scan with lower threshold swept

While investigating software to extract bone data from CT scans and turn it into 3D printable STL files, I played with a CT scan of my own head that was used to treatment plan orthodontics.  I have been using DeVide to process the data and finding it is not only easy to use, but a lot of fun!

The animated gif was made by sweeping the lower threshold of a dual threshold module from -800 to 900 in steps of 100 with the upper threshold fixed at 1400.  The effect is to strip away the lower density tissues leaving only dense bone at the end of the sweep.  I saved the result of each run as a png file then converted to an animated gif using an on-line service.

Reposted fromhackerspaces hackerspaces
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