Showing posts with label Rhino3D. Show all posts
Showing posts with label Rhino3D. Show all posts

Friday, 13 December 2013

'Very Good'

‘Very Good’ Lecture – Norwegian Crafts, National Museum for Decorative Art and Design, Oslo. 21 November 2013

(This is part of the lecture that I gave recently in Oslo on the subject of the relevance of craftsmanship)

I have been reading a book by Robert MacFarlane (2012) called The Old Ways. In it he describes exploring ancient routes, on foot and by sailing ship. He talks about the way in which the creators and followers of these paths and roads have left their traces on the landscape and how present-day wanderers connect to past generations through those marks and signs, whilst adding their own for future generations.

MacFarlane defines the ancient Celtic word immram as a kind of sea-voyage from the known to the unknown. It can be used to describe a pragmatic journey, one from A to B, but also a mystical spirit-voyage, something like the Aboriginal walkabout. Through this journey the present can be reunited with the past and the real can be connected to the unreal. 
Whilst reading the book, I was thinking about how this could also describe the act of making. There are similarities. For one thing, making is not a static activity; it requires movement, often repeated movement, like walking. For the most part, the paths that the maker treads are familiar; we know our tools and the way to use them. But from time to time the conditions change. This is analogous to how a skipper of a sailing ship must constantly be alert to subtle signs that the wind direction is going to change. The tools and processes that makers use also need to be responsive and evolve. Traditionally, the knowledge and skills are passed on from hand to hand. Once they travelled the world along trade routes such as the Silk Road, and now they can be passed on over the Internet via YouTube. 

A few years ago I held some fourteenth-century pots excavated at the farm next door to where I live. When I put my fingers on the marks left by the potters’ hands, I felt an almost tangible electric current arcing back over 600 years and uniting us. It raised the hairs on the back of my neck.

Making is a voyage of discovery, one where we adapt our knowledge and experience to unfamiliar or unknown landscapes. For me, it is a way of visualising the abstract, of realising an idea or concept as an artwork. Recently, Grayson Perry described an artist ‘as a pilgrim on the road to meaning’.[1]

I would like talk about my practice as a way to explore how the methods I use have contributed to the blurring of boundaries between art, craft and design. I hope that this way of working will encourage the viewer to ask ‘what and why’ not ‘how’. Having said that, in making my artworks, I am very interested in the ‘how’, as I am using emerging technologies that were not designed to do what I try to make them do. But I hope the viewer will go beyond that stage and start to unpack the narrative and react to the ideas that the works explore.

We are now in the early stages of a new Industrial Revolution; over the past 20 years digital technology has made massive changes to the way things are designed and made. According to Grayson Perry, if Michelangelo was here now, he would be making CGI movies. And can you imagine what Da Vinci would be doing?[2] Designers and makers have always been interested in materials and processes, for without them it is impossible to realise an idea as an object.

Technological advances often create new movements in art and design. For instance, the American portrait artist John Rand invented the paint tube in 1841. Before that, all oil paint had to be prepared by an artist or assistant in just the small quantities needed for the day. You could therefore say that French Impressionism would not have happened without Rand, as the paint tube allowed artists to paint outdoors. But when we visit the museums in Paris to see Monet’s paintings of water lilies, do we think of John Rand?

Something similar is happening now with emerging digital technologies; there is a growing community of creative people appropriating these new tools and adapting them to purposes for which they were never intended. And as a result, there are questions being asked about the place of these new tools in the practice of makers.

My particular interest is in making meaningful objects that explore both the actual world and the virtual world of computers. To achieve this I use some of the new tools that are available to us, particularly Additive Manufacturing, which refers to the technology commonly known as 3D printing.

For me, the attraction is that this technology allows previously impossible objects to be made.

Many people, and this includes many of my colleagues from the studio pottery world, think that 3D printing simply happens by ‘pressing the button’, but through my works I hope to demonstrate that the new tools I use require the acquisition of new craft skills and thought processes.

Yet being seduced by this wonderful new toolbox is unlikely to produce great art or craft. I agree with Peter Lunenfeld when he writes that technological enchantment leads down a slippery slope to the ‘media of attractions’, defined as ‘[a]rtefacts of digital culture whose appeal is essentially their perceived novelty. They attract less for what they mean than for the fact that they are’ (Lunenfeld 2001: 173).

Working in the virtual world of the computer does not teach you about materials and processes. It should be underpinned by working with your hands, testing materials and exploring processes. In other words, it is a matter of learning by doing. Getting involved in making things at an early age and staying involved must surely be the way forward in order to reach a level where tacit knowledge and haptic skills can be applied almost subconsciously to the creation of a meaningful object.

I might not go so far as to say that we need a new Arts and Crafts movement, but if we do, I would like it to have a less romantic vision and a more inclusive philosophy than that of William Morris. I would want it to embrace the new technology and recognise the craft of working with code. I believe C.R. Ashbee, who was an important proponent of the Arts and Crafts movement, would have agreed with me for the most part, as he quotes his friend Frank Lloyd Wright in his journal:

“My God” he said, “is Machinery; and the art of the future will be the expression of the individual artist through the thousand powers of the machine, - the machine doing all those things that the individual workman cannot do. The creative artist is the man who controls all this and understands it.” (Wright, quoted in Hanks 1979: 79)

With this I am not saying that I have all the answers, but I would like to describe the journey that I have made as one possible route to creatively combining the old and the new skills and tools. I define myself as a Maker, someone happy to explore the overlapping grey area between art, design and craft.

Over the years I developed the traditional skills of a potter. For the past few years I have been learning to transfer these skills to some new tools, hoping to realise their creative potential. However, for over 20 years my wife and I ran a pottery studio where we designed, made and supplied masses of functional domestic ware to shops, galleries and stores such as Habitat in the UK and Barneys in the US and Japan. The work we produced was decorative and functional. So over time I developed the craft skills and tacit knowledge required to produce lively pots.

These pots are very much about the materials and processes that I used to make them. I was trying to freeze a moment in time, capture a curve with grace and energy and record the effects of flame interacting with rich lead glazes. However, in the 1990s, the work began to move away from the purely functional. I started creating pieces that investigated the abstract nature of forms, using surface treatment to create harmony or disharmony and to create illusion and uncertainty for the viewer.

Alongside my love of ceramics I had been developing an interest in digital technology. When websites came about, I thought it would be useful to have one. I wanted to design the website myself so I went to an evening class and learned to write HTML code. I discovered that it involved a different way of thinking, a different way of problem solving than what I was used to as a ceramicist. And I had also heard of something then called Rapid Prototyping, which referred to digital techniques for creating 3D prototypes. So I thought ‘Fantastic, I can make anything!’ But how could I bring these two worlds together?

In 2006 I was fortunate to be accepted by the Royal College of Art to undertake an MPhil research project. I needed a break from running the pottery business in order to develop the ideas that had been bubbling away for a number of years.

At this stage I started using CAD software and found it to be a very useful tool for exploring variations of a form. It makes it easy to develop numerous iterations of an idea, and, even though the virtual is no replacement for the actual, there is enough visual information to determine whether the geometry and proportions are going to work in reality.

Once I was happy with a design on screen, I could translate the virtual into the actual using traditional pottery methods. Through this investigation, I could explore the relationship between the traditional craft skills that I had amassed over the previous 20 years and the new digital tools that I had become interested in. In an early RCA project I tried to create a Torus form using traditional techniques, but I could not achieve the exact shape, scale and control over the proportions that I was looking for. So I began exploring a number of iterations of the form using Rhino CAD software, returning to the wheel at each stage to throw what I had virtually created on the computer. Once satisfied with the form of the piece, I then had a full-scale model produced by CNC milling, which shapes the object with high precision. From the resulting prototype, I cast a mould and then slip-casted the object from that. The final outcome of the project is called The Event Horizon, and I still hope it engages viewers in a sensory experience, rather than encouraging them to focus on how the work is made.

After this exploration of how traditional and digital tools can be creatively brought together, I came to the conclusion that they are only tools and that there has to be a reason for using them, whether it be a desire to explore, an idea to communicate or a problem to solve.

My final practical research project at the Royal College of Art was the first fully digital piece that I made. I believe it gives insight into the thinking and the craft that went into its production.

The project was intended to test the digital software and hardware, but I also wanted to tell a story with the work. I decided to redesign an iconic object from the first Industrial Revolution. Inspired by Josiah Wedgwood, the great ceramic innovator of the eighteenth century, I chose a tureen from the 1817 catalogue. I recreated it on Rhino software and gave it a delicately pierced surface inspired by bone and the natural objects used by Wedgwood and his contemporaries as sources of inspiration for many of their designs. The pierced surface also refers to the artificial bone produced by Additive Manufacturing for medical reconstructive surgery.

The tureen was printed on a ZCorp 3D printing machine in a type of plaster material. It was then infiltrated to give the plaster material more strength and then coated in a proprietary non-fired ceramic material, formulated to closely resemble Wedgwood Black Basalt.. For some versions I used traditional Wedgewood colours, like the pale blue we know from Jasperware pieces, and sometimes I used very strong modern colours.

The next project I did was based on a 1766 Sèvres porcelain jar with a lid, which I found on display in the Wallace Collection in London. Through this piece, I wanted to explore the cultural and financial value of objects. Its theme is pretence, but it also explores making and the importance of skills. I wanted to compare the materials and processes used in the manufacture of the two pieces. The original Sèvres piece is made of porcelain, a beautiful but non-precious material that has been skilfully fashioned by artisans. At the time when it was made, porcelain had been given enormous cultural and financial status, primarily through the patronage of the French Royal Court.

In contrast, my response is made of nylon, a useful but simple everyday material. The design took me about 150 hours to create on the computer. It was then printed using extremely expensive technology, coated in non-fired ceramic material and then carefully decorated with artificial gold leaf. It is now in a private collection in New York, appropriately displayed alongside an Andy Warhol painting. So how do we equate value and worth? And how does craft fit into the calculation? These are questions I try to address through my work.

Today there is an ever-expanding array of new high-tech tools at our disposal. They are all worthy of exploration, but I do not want to use them just because they are glitzy and new. They must enable me to convert an idea into a meaningful object. And I hope that my practice plays a part in demonstrating that the making of thoughtful objects – whether they are categorised as art, craft, design or some hybrid – is a process and must be responsive in order to make those disciplines relevant to the times in which we live.



Hanks, David A. (1979) The Decorative Designs of Frank Lloyd Wright, Mineola, NY: Courier Dover Publications.

Lunenfeld, Peter. (2001), Snap to Grid: A User’s Guide to Digital Arts, Media, and Cultures, 1st ed., Cambridge, MA: MIT Press.

MacFarlane, Robert (2013) The Old Ways, London: Penguin.


[1] Reith Lecture, 2013. BBC Radio 4, 05 November 2013.
[2] Ibid.

Wednesday, 19 June 2013

Ceramic 3D printing tests 06 - and more...

19.06.13

My penultimate day here at KHIO in Oslo and a morning of ups and downs. I mentioned yesterday that we were asked to use a kiln with extraction that has the benefit of being able to control the cooling cycle.

As you can see, the new test cubes, with thicker walls, have suffered in the firing. one has broken in two, one has cracked and the third is OK.









 

The larger version of my architectural piece has also suffered. It has deformed due to the weight of the upper part and the shell has come away from the core. There are a number of possible causes:
  1. The speed of firing was too fast.
  2. The speed of cooling was too fast.
  3. The structure of the piece was not strong enough.
  4. The binder settings were wrong. 
  5. The ceramic powder formulation.
My feeling is that the cause was primarily either 1 or 2. Previous firings have been successful and the deformation of the pieces has happened in the printer, not in the kiln. 
The structure could be stronger to support the upper part.

We obviously need to conduct more tests, especially as the red earthenware seems to behave itself very well.

I have just found out that the Potclays powder will withstand 1300°C, so I plan to take some of the tests back to Manchester with me and try a selection of high temperature glazes.



So far today, the good news has been my Prtlnd Vase. It appears to have come through the printing unscathed, I'm very pleased with the detail of the surface decoration. There's litle loss of definition. The photograph shows the piece just after it was cleaned up in the depowdering unit, but it is still full of powder at this point. At this moment in time it is sat in a warm kiln, my next job, when I have finished writing this, is to remove the powder from the interior and put it back into the kiln on a warming cycle. And then programme the kiln to start firing at about 10pm this evening.
If it goes well, I will be able to take it home with me to decorate and glaze fire.






Here's what the Prtlnd Vase looked like on the Zprint software.

Before packing up for the day I glazed a selection of tests with the clear glaze and set them to fire overnight.

Tomorrow afternoon's kiln opening will be very interesting, hopefully there will be some posiitve results.

Tuesday, 18 June 2013

Ceramic 3D printing tests 05 - Yet more...

18.06.13

Only 3 days left here in Oslo and suddenly I'm trying to work out how to fire more kilns than time allows! However, Knut who runs the ceramic workshop has asked me to use a larger kiln that has extraction. The sugars in the ceramic mix were filling the (huge) kiln room with caramelly smells (& smoke). The good thing about the larger kiln is that the cooling can be controlled and assisisted by fans, so I stand a chance to get the majority of the tests through.

Here's the results of the 1100°C firing. The only reason that the red clay bars are broken is that we (very non-scientifically) broke them to see how strong they are in the green, unfired state. The sugars actually make them fairly difficult to break, there was a certain amount of stretching, rather than a simple, clean snap. It gives you more confidence when removing pieces from the printer, though after 2 hours they are still flexible. We find that leaving them overnight is best.





Yesterday afternoon, Trine introduced me to some more tools in the modo software toolbox. I hoped to print a ceramic version of my Prtlnd Vase, an interpretation of the Portland Vase. I produced it in nylon by SLS and it was recently acquired through the Art Fund at Collect for the New Walk Gallery in Leicester.


The handles on the original CAD file are a little thin for ceramic printing and modo was a very useful for rebuilding them intuitively. The software also tidied up the mesh and considerably reduced the file size.
I was keen to build this as large as possible which meant converting all the Potclays powder to 1:1:4 which we think is the strongest of our trials. Trine had mixed some more yesterday, so that was sieved together with the rest and there was enough to completely fill the feed chamber. I had a conversation with Trond, who looks afetr the machines in D-Form. He suggested that the binder settings should be reduced as it could be the cause of the deformation in the build. He thinks they could simply be too wet. So I reduced the Shell to 85% and the Core to 70%. We will see if it has the desired effect.

After putting the build on, I mixed up a lovely lead-based clear earthenware glaze. The recipes that we have used for many years in the studio at home are Lead Sesquisilicate based, but they don't stock it at KHIO (who does?). The recipe I used is taken from 'The Potters Palette' by Christine Constant and Steve Ogden, an excellent source of some fabulous glaze recipes and shamefully out of print.

Lead Bisilicate 65
Whiting 10
Potash Felspar 15
China Clay 10

Fire to 1085°C with a 20 minute soak. A small amount of liquid calcium chloride added to the glaze prevents it from settling out and aids even glazing. But be cautious, if you add too much you can turn the glaze into the consistency of blancmange!


These pieces were popped into the kiln along with some vitreous slipped pieces. The plan for tomorrow is to slip and refire as much as possible and then glaze and fire them.

And then I'll hopefully have time to squeeze the Prtlnd Vase into a firing before my early morning flight back to the UK on Friday morning.

Monday, 17 June 2013

Ceramic 3D printing tests 04 - More

16.06.13

Sunday morning is quiet in Oslo, mind you as a capital city it has a very relaxed, unhurried feel any day of the week. Someone will tell me that I happen to crossing pleasant, residential parts of town, but my impression is that people are friendly and are lucky to enjoy a safe and engaged lifestyle. One major downside though, is the expense. So I'm cooking up big pots of veggie bolognese sauce for pasta.



Anyhow, I arrived at KHIO before 9.00 and went straight down to the kiln room to see the results of the 1000°C firing. 
I have never seen such well equipped facilities as these. The kiln room alone is on an industrial scale, the students must either feel really excited on seeing them or completely daunted, particularly as some ceramics students have never touched clay before starting their degree!

The red clay 1:1:2 mix has decomposed more than at 950°C, but the other test bars look pretty similar. 
The shrinkage is approximately 14%, which I think is acceptable. When the tests are  finished I'll analyse them more carefully and publish the findings so that comparisons can be made easily.








I started another build with a new, larger version of my architectural piece and a test cube with thicker walls. This time I filleted the edge of the circular openings, as the first version has edges that are sharp and brittle.











And here are the 1050°C tests, the photograph taken just after the 'african vegetable' has been picked up! It came out of the kiln in one piece, quite an achievement considering the sections were very thin. I don't understand why the piece at the bottom right of the photograph broke in the firing. I don't think it was a stress fracture. The Potclays 1:1:3 and 1:1:4 are stronger than at the lower temperatures and are slightly stronger than the red earthenware versions.







The test cubes fired with very little extra distortion. They have now been dipped into the vitreous slip and await firing.





 

Friday, 14 June 2013

Ceramic 3D printing tests 02 - Why?

14.06.13

note the deformation.
The printing of the Potclays powder was a repeat of the red clay tests. 1:1:2, 1:1:3 and 1:1:4 mixtures were all successfully printed. 
It's important to leave the prints in the printer for 2 hours at the very least before removing them. Even after 2 hours some were a little soft and started to bend. Better to leave prints overnight, particularly if more complex parts are being printed.



All the test bars were left to dry on top of a warm kiln overnight and this morning the excess powder was removed in the depowdering unit and the 950°C firing started.
The kiln was still around 100°C from a previous firing, but I decided to take it up slowly - 7 hours to 600°C, then 2 hours to 950°C with a 30 minute soak.

Even though we are awaiting the results of the firings, it seems a good opportunity to print a more complex form. My instinct tells me that that the 1:1:2 mixture will shrink a great deal and probably be the weakest, so I'm inclined to try the 1:1:3 powder. We will see... 







test cube
60mm test cube
First of all I quickly created a cube with a sphere removed from the interior. This gives us a simple shape, probably impossible to slipcast that has a surface that just about covers every angle. So it makes a good glaze test, as well as testing the rigidity of the ceramic powder.

I actually set 3 versions printing, one as designed, the other two scaled one dimensionally to allow for possible deformation in the drying and firing.


  




test cubes
80, 70, 60 mm test cubes
It's important to remember that this is not simply a technical exercise. If successful, there may be all sorts of potential uses for ceramic 3D printing, certainly medical being one of them. But that is not my prime motivation. Rather selfishly I suppose, I hope to be able to print my artworks in ceramics thereby combining my previous experience as a maker of slip-decorated earthenware, my understanding of the 3-dimensional form and my interest in the act of making with this new, so-called post-industrial technology. So it's all about research, not technical research, though that can't be avoided, but research that engages with our fundamental relationship with objects and the making of them.
I feel it is timely to look at this area, not just because we have new tools, but because our increasing reliance on 2-dimensional screens to engage with the physical world has the potential to detach us from the sensory experience and feedback we receive when we take the trouble to venture outdoors, smell those flowers in the garden, pick up that smooth stone or spot the woodpecker calling from a tree. You probably think I'm just being romantic, after all I'm one of the generation that bridges the digital divide, but when I hear about the exciting advances in augmented reality, where it will be possible to surround ourselves with virtual objects, rather than actual, physical stuff then surely it's time to question the very nature of our relationship with objects.
WIll we need to buy another pot or painting to decorate our homes when we will be able to simply download a holographic Ming vase?

Anyhow, I'll just leave that hanging in the air...


Thursday, 3 February 2011

yet more actual and virtual.....

These last few months have been both exciting and frustrating in equal measure. I have been continuing my investigations of the actual/virtual theme in my work with the design of a new piece, or pair of pieces called Amalthea. They are complex cornucopia like pieces, one filigree, its companion a solid version with raised surface decoration.



To begin with, I generated a type of QR code known as a ‘blotcode’ which links to a page on my website when scanned by a barcode reader, available as an App for some smart phones. I then extruded the 2-dimensional image into a 3-dimensional form using Rhino 3D software. The cornucopia shape of Amalthea refers to the wealth of knowledge available on the World Wide Web whilst the cryptic symbols within the filigree refer to the consequences this may have on society.
Objects often have stories attached to them. They can commemorate an event; they are often transformed into family heirlooms and passed on with the stories associated with them. Amalthea also tell stories, but these stories are online, so have the potential to include text, video, image and music. They can be added to over time, creating a repository of memories and information.
So when the viewer scans Amalthea with a barcode reader mobile phone App, it connects to a page on my website telling the story, providing additional information thereby creating a simultaneous actual and virtual experience.
I plan to offer a series of similar pieces where the QR code is generated for a client linking the piece to information specific to that person. So, as heirlooms, the virtual experience could tell the story of the journey of that object through the generations.

In the making of Amalthea I have become increasingly aware of the complexities of Additive Manufacturing and selective laser sintering (SLS) in particular. The machines are complex, with a myriad of controls that the operator/technician must become as attuned to as any craftsman does to their tools. It's certainly not a case of 'pressing a button' as some people think. And though I am not the highly skilled person operating the machine I need to have both a reasonable understanding of the technology and a good working relationship with the operator.

When my work was produced in France, it was made on a ZCorp 3D printing machine. This is far simpler than the SLS technology as it employs a liquid binder rather than a laser to build the layers. And it's one of these machines that we are going to use in an attempt to print objects in clay. This is the dream that I have had since I first heard of Rapid Prototyping quite a few years ago. Our project at the Bartlett School of Architecture in London will build on the excelent work of Mark Ganter and his team at the Solheim Laboratory at the University of Washington in Seattle. We are also grateful to Ronald Rael and the ceramics laboratory at the University of California, Berkeley for providing us with a detailed technical report of his team's thorough testing of ceramic materials.
The Open Source philosophy of this research is fundamental; thanks to the generosity of Mark Ganter there is a growing community of like-minded groups all ploughing the same furrow. By bouncing ideas of each other the momentum is increased and reliable materials will be available for the many, rather than the few.

Though printing the Amalthea in clay is probably a little way off, I am very excited by the prospect of being able to bring both my experience and knowledge of ceramics together with the emerging technology of the 2!st century.

Sunday, 3 February 2008

01.02.08

This week has been spent working on a mixture of tasks.
I finished designing the glass moulds on Rhino 3D. They are intended for production on the Z Corp machine in RapidformRCA, then infiltrated and cured. They should then be able to comfortably withstand the heat of rotation blowing. I first designed a piece to test both the materials and how the glass would fit the form, but decided that it was more productive to design a piece that related directly to my project.







Last weekends unfinished writing on ‘Sensing the Container’ gave me plenty to think about during the week. I revisited the Anthony McCall exhibition at the Serpentine Gallery and saw a number of connections to my thoughts on form and formlessness. The light, projected through smoke across a darkened room takes on a material quality that is not dissimilar to water or a translucent liquid like the Darjeeling tea that I drink. Being able to enter the beam of light, and engage with it, dramatically changes the experience of the space. The boundaries of the gallery completely dissolve; there is virtually no sense of anything apart from the slowly shifting form of the projected light and the image it creates on the wall.












I managed to resurrect our research seminar group a.k.a. the Cake club for a meeting at the V&A on Thursday. We met to discuss the ‘Out of the Ordinary’ exhibition, then were treated to tea and cakes by Heike in the wonderful Morris room of the cafe. There were mixed feelings about the exhibition, it was not greeted with complete enthusiasm. The glasswork of Susan Collis for instance, was generally regarded as literal, leaving little for the imagination, whereas the intricately carved plants and flowers by Yoshihiro Suda were appreciated both for the dedication of achieving such a high level of craftsmanship and their poetic quality. For me the positive aspect of the exhibition is that it is labelled as ‘craft’. From my perspective of 20 plus years making functional pots and now having the luxury of time away from the studio to redefine my future practice, I am excited by the attempts to redefine and reposition ‘craft’.