Prototype waterbomb flower

July 24, 2007 on 9:07 am | In Oribotics, Robo Tech | No Comments

In this video you can see the prototype oribot, handmade mechanics, being actuated through the firgelli micro linear actuator.

VHB 9473

July 20, 2007 on 9:32 am | In Oribotics, Robo Tech | No Comments

VHB 9473oh boy, I just got some super sticky tape from the US. Its called VHB (Very High Bond) tape made by 3M. Varieties of this tape is so strong its used in aircraft and buildings. Kind of amazing to think that sticky tape has become one of the strongest bonding agents. Well its not just sticky tape. Anyway I wrote to 3M and they advised me that the tape I need is the VHB 9473 tape, its 0.25mm thick, and is double sided and bonds aluminium, stainless steel, and plastics together. It takes a few days for the bond to acquire full strength. I can wait to try it out. Its kind of fun to think of doing away with screws in favour of this stuff!

I searched high and low for an Australian distributor of 3M tapes, talked to guys on the phone, only to find that I have to buy cartons to get a single roll, its too specialised and no one sells it by the roll, at least the VHB 9473… So I went to the US, and found CPC, rang through an order last Saturday morning, and it arrived today, very happy. I love making art, you get to try out so much cool stuff.

Folding Metal

July 9, 2007 on 10:05 pm | In Oribotics, Robo Tech | No Comments

I’m modelling the current generation of oribots, and have prototyped a new design and am going to make the parts from aluminium with some folds.

Ok. so I haven’t folded much metal before, and while I was modelling with my favorite modeller blender I was struck by the idea that metal has a thickness that needs to be considered when folding! Of course it does! My modelling prior to this point was all about aesthetics not about accurate measurements for laser cutting.

I’m trying to determine where to mark the fold on the aluminium so that the outside edge of the fold ends up at a precise location. By outside edge I mean if you have a sheet of paper on the table, and you make a valley (concave) fold then the outside egde is the bottom side of the paper.

So how do you calculate the radius of a fold (or bend radius)??? Well thanks to this Sheet Metal Bending Calculator I found some answers, which I am yet to test…

The following are my illustrations to help educate my train of thought on the matter.

I’m going to use the following values calculated using the Sheet Metal Bending Calculator.

1mm Aluminium
bend radius 1.591mm
outer radius 2.566mm
length of fold 4.037mm
length before 90º outside egde of fold 2.566mm (same as outer radius)

Measurements for folding 1mm aluminum

2mm Aluminium
bend radius 5.132mm
outer radius 3.183mm
length of fold 8.061mm
length before 90º outside egde of fold 5.132mm (same as outer radius)

Measurements for folding 1mm aluminum

Firgelli PQ-12f Micro Linear Actuator

June 15, 2007 on 9:34 am | In Uncategorized | Comments Off

My shipment of PQ-12fThese are great. Micro Linear Actuators, made by Figelli.

I bought a couple and tested them, at the time they had 2 types of the PQ-12, an s for speed type, and an f for force type. We ended up going with the f for force. They aren’t cheap at US$53 each, but from our testing so far they are perfect for the job we have for them.

And my big shipment of 15 units just arrived all in order.

The geometry of leaf folding

May 24, 2007 on 6:42 pm | In Day to Day, References, Oribotics | No Comments

It’s amazing what you can find out there, here I am, an artist working with robotics and origami, working on a new oribotic design, thinking about leaves. I turn to research for inspiration, and I start to follow a trail from the 2nd Origami Art and Science conference proceedings. It’s Biruta Kresling. I get the strong feeling that she’s understood the lines of thought ahead of me and is seeking these ideas in nature for design inspiration.

Then googling Biruta Kresling’s work on analysing natural structures for inherant folding patterns and design I came across The geometry of unfolding tree leaves by H. Kobayashi and others. Biruta is one of those others.

The essay presents me with a picture, and I can immediately imagine a robotic leaf, and I say to myself - ‘That’s it!’

Mylar as laminated hinge

April 27, 2007 on 8:48 am | In Uncategorized | No Comments

Made an experiment today after reading that mylar was being used as a materia for solar sails. I thought if its good enough for NASA its good enough for me. The result is a quite springy waterbomb base. It has potential. I used a 75micro sheet laminated with 300gsm card.

Oribotics [giant]

April 27, 2007 on 8:41 am | In Uncategorized | No Comments

It’s been a while since I last made an entry, been busy, got married had a baby, and applied for more funding (not necessarily in that order - the funding that is…)

So I thought I’d better come back with something BIG. Giant in fact.

This image is from a recent application to the Australia Council for the Arts, wherein I applied for funding to research the creation of giant oribots. Its been a long term dream and I’d love to build a big one a public artwork. The research grant is to prove the concept, and develop necessary documentation to make the build possible. We’ll see how it goes.

Network diagram

February 27, 2007 on 8:21 am | In Uncategorized | No Comments

This is the network diagram that describes the relationships between audience, oribots and the various networks and computer functions. Its presented at a high level of abstraction, and the color coding is intergral to understanding the document. Take note of the colours used in the network field, and the colours used in the outline of the text description boxes.

Download this PDF to see the diagram with the full brief for the hardware programmer Ray.

Oribotics [network]

January 4, 2007 on 1:23 am | In Uncategorized | No Comments

The next evolution of Oribotics will be oribotics [network]. Supported by Arts Victoria’s arts innovation fund. The work will premiere at Federation Square in Melbourne in October 2007. The work will consist of a new generation of folding robots that each have built in wifi and bluetooth networking.

The core project team is Matthew Gardiner and Ray Gardiner, the team that delivered the earlier two versions. We are extending the team in the production stage with an industrial design/fabrication company. I met the guys at Design Sense when working on Phillip Adam’s Origami work. They fabricated several large scale folding sets from small prototype designs, and so on that basis Design Sense will work on refining the design of the prototype robots to the final polished products.

Our project partners are Federation Square who are providing:
Studio space for the development of the work
Exhibition space in the Atrium

Aphids are auspicing the project, encompassing project and financial management, as well general support and assistance in securing additional funding or support from other arts bodies. All round good guys!

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