Posts Tagged 'led'

Knicks LED light, use of digital fabrication for design prototyping

This light was in the making for a long time and is now finally completed. See earlier post. Its design includes several digital fabrication processes like laser cutting (acrylic and brass) and rapid prototyping (gold-plated stainless steel) using Ponoko‘s distributed manufacturing system. All metal surfaces are gold plated taking advantage of Ponoko’s US based production hub which offers rapid prototyping directly into metal.

Its dimensions are: 600 x 150 x 710 mm and the light head holds four 1watt LED’s.

More lights of this series here.

Image

Image

Image

Light objects for Art School Library, making

This post describes some technical and making aspects of the Light objects for the ANU School of Art library. You can read more about the design aspects here.

reading pit at ANU School of Art

During the making of these lights a mix of manual and digital fabrication processes have been used.  Brass and aluminium pieces have been laser cut while the translucent red elements had been rapid prototyped by ‘Rapid Pro‘ in Victoria, Australia.

The black curved arms are five 2.5mm layers aluminium, riveted together to create an inside channel concealing the cables up to the brass cylinder. They have been laser cut locally in Canberra by Acuform.  The cylinder forms a central hub from which four conical carbon fiber tubes stretch out and support two light heads on each lamp. The lights have a wingspan of 1.4 meter.

right of two light objects

Each light head has six one-watt LEDs. The LEDs are mounted on a decorative brass cooling plate (cut by Ponoko) and are cooled by a fan. The following parts had been used: LED ring with six one watt LED (LSP6-WW-XXX) and Controller/Driver (MDU9-SC-3570) from Future Electronics. All elements are enclosed by ABS housings. These housings are rapid-prototyped using translucent red FDM material from ‘Stratasys’.

Three views of the light head

Views of light head

The curved aluminium arm extent from the main brass fitting which is strapped onto the existing column with an aluminium strip. This strip has custom brass connectors to adjust the tension of the strapping.

Main bracket and centre bracket

The electronics – led drivers and fan power supplies – are placed inside the void between the column and the main brass fitting. The 12 volt fans are driven by 6 volt power-supplies letting them run without developing noise. Before the installation the lights had been tested for several days.

Light objects for Art School Library, design

In December 2009 I installed two light objects in the library at the ANU School of Art. Please find a post about the making of these lights here.

reading pit at ANU School of Art

These two lights provide four ‘highlighted’ spots for reading or lab top use within the reading pit. The design intent was to connect the space inside the glass walls of the reading pit with the surrounding architecture. The objects themselves should have a mechanical but yet organic feel to them. I used the two columns on either side of the reading pit as anchor points from which the lights reach over the seating area in a ‘branch and twig’ fashion. All brass parts of these lights – being cylinders of sorts – referring to these columns. The lights are lightly strapped to the columns highlighting their light weight construction. The colours have been limited to Brass (gold), black and red.

right of two light objects

The lights are made of aluminium (powder coated black), brass, carbon fiber tubes and LEDs.

one of four light heads

one of four light heads

The designs on the glass panels and on the fabric on the cushions are by Annie Trevillian. Many thanks also to Irene Hansen (head librarian) and Murray Napier for their support of this project.

Obrut colour variations

This image shows some of the possible combination of materials and colours I played with for the 2nd series of this light object. Basically all 3mm materials could be used as a base. Ponoko has many exciting colours in their materials catalog.

Obrut light in different colors. This light is designed by Gilbert Riedelbauch

Obrut light colour variations 1st set

Preparing for Highlights, 3

Further to my last blog, Preparing for Highlights, 2.
Yesterday, my first Ponoko laser cut pieces arrived and it was worth waiting for. After peeling off the protective sheet, that still showed the impact of the laser’s heat, clean clear pieces popped out of the cut Perspex sheet. I had used the clear 2mm thick Perspex material out of Ponoko’s material catalogue.

Peeling off the protective layer

Peeling off the protective layer

The edges are clean and appear almost polished and do not show, as I had expected, some ‘burn’ marks. As Ponoko suggests in their ‘starter kit’ the dimensioning of interlocking pieces might need a bit of fine-tuning, I found that while having a good fit the slots I had designed have been a bit too wide. This will be easily fixed in Illustrator, as I have in mind to get more of the same parts cut in different colours for further variations of this lamp.

close up of the lamp's head with heatsinks for Led's

close up of the lamp

These parts form the ‘head’ of the desk-lamp for which I had already made all other parts. The assembly was straight forward as everything, the rapid prototyped and laser cut parts fitted very well together. I used sandpaper to make the surface of the parts opaque as the clear was ‘too’ transparent. Now the LED’s make the whole head light up.

Prototype put together

Prototype put together

Opaque surfaces

Opaque surfaces

I am very pleased about the straight forward way Ponoko’s system enables me to include precision cut pieces as part of my designs. Living in Australia made it a three week turn-around-time which was somewhat testing. But I already look forward to the next shipment with parts that will combine laser cutting with laser engraving. Ponoko has great instructional videos about this on their site.

Preparing for Highlights, 2

I just put together the prototype of a desk-lamp. This object uses polished stainless steel, ABS plastic (rapid prototyped parts), an aluminum tube coated with carbon fiber, laser-cut Perspex and 3 warm white 3 watt LEDs.

Computer rendering 1

Desk lamp computer rendering

For the first time I will use a net based producer for part of the making process. Most of the lamp’s head part – the laser cut Perspex – will be produced by Ponoko . A clever (company) setup that laser cuts and laser engraves materials based on ones own design. Ponoko’s well working website makes it easy to get started. From selecting the materials to producing the right file formats for cutting and/or engraving all is explained in easy to follow steps. I am eagerly awaiting the first shipment of the 2mm thin cross-sections for the ‘reflector’ part of the lamp’s head.

After modeling the lamp shade as a ‘solid model’ first in CAD (formZ) I then sliced it into the cross-sections, these sections were then imported into Adobe Illustrator and saved out in the right format for Ponoko’s processes.

Cross-sections for laser cutting

Before uploading the file to be laser cut, I printed and cutout the Illustrator outlines and put together a mock-up of the lamp shape to see if I like the design and to get an idea if the pieces fit together.

paper mock-up of the lamp's head of lasercut design

paper mock-up of the lamp

Computer simulated lamp head

Computer simulated lamp head

I also rendered a simulated view of the final head-piece as well as the whole desk lamp. I hope the final ‘real’ object will closely resemble this simulation.

prototype of desk lamp with paper shade

prototype of desk lamp with paper shade

What I thought was a good idea – and all the work that went into an object trying to make it work.

Responding to a call to participate in the APM (Accredited Professional Member) exhibition by CraftACT with the title Interior Exterior I decided to make a light object. This show will open on Thursday 18 September at 6PM. Taking the dualism in the title as a starting point I used a warm light (1watt LED) representing the interior and a cold white LED as its counterpart. Both lights are directed towards each other and shinning onto a slightly curved transparent screen. See image of a few preliminary drawings for this object.

This screen is the membrane separating the inner from the outer. At this screen the different light qualities mix or fuse. Interestingly you can see the cold white on the ‘warm’ side of the screen and visa versa.

However when I started to model the components for a simulation on formZ (CAD) it became apparent that ‘all that stuff’ I needed to hold the elements in place was distracting form the pure, initial idea. What are now little cubes housing the LEDs were various (failed) designs going from bad to hideous. Even the cubes I have now are somewhat a compromise. Also the base-box which is capped by two alu plates and a white rapid prototyped frame feels like a necessary compromise to me. It contains the switch, driver and an additional LED (360 degree), which illuminates the base lightly from the inside.

First I wanted the top alu plate to be in mirror-polish but this particular alu piece I used had too many inclusions creating the occasional streak in the otherwise polished surface. To hide these streaks I used the new high tech Ink jet printer at the ANU School of Art , it can print on anything up to 40 mm thick with ink. The ink is then cured (baked on) with UV light. (One of our staff printed on a room door). The pattern I got printed onto the alu was derived from a piece of white sandpaper scanned in then the image was inverted and finally a ‘chrome’ filter in Photoshop applied. I usually avoid filters and effects at all cost but this pattern seemed to be able to run from the interior to the exterior section of the object without problems.

Now that this object is together and shines when switched on it has grown a little on me, but still it is an object that is neither a lamp nor a sculpture. Maybe, if I find the right (friendly) term for it it will settle into its place. Materials: Aluminium, ABS plastic, LEDs. Dimensions: 100 x 100 x 95 mm


images of work

More Photos

categories