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Ewloe, United Kingdom
Writing, tweeting, debating and occasionally getting a little over-excited about 3D Printing. But always aiming to keep it real!

Monday, 17 July 2017

A Review of the International Conference on AM and 3D Printing

This conference, which took place at the Nottingham Belfry hotel and conference centre and is hosted by the University of Nottingham, once again, did not disappoint. The 2017 edition was the 12th annual event in this series and increased once again in both size and stature with in excess of 250 delegates and more than 30 exhibitors on site, according to the organizers. Following a well-trusted formula, the emphasis was well and truly on the provision of information — both through the high-level, in-depth conference presentations, and the intensive networking opportunities afforded during the conference days.

The quality of the conference programme was high and broken into two parts over three days. Day one took place on Tuesday 11th July and was run separately to the “main event” which took place over the next two days. The first day was dedicated to the “Industrial Realities of Additive Manufacturing” while the following days ran under the conference title.

In terms of the demographics of the attendees, it was unmistakably an educated and knowledgeable crowd, when it comes to AM. Prof Phill Dickens,’ who introduced the industrial day, took a straw poll that highlighted this nicely when the vast majority of hands raised indicated some involvement with AM in their work. There were a handful of delegates completely new to AM, seeking information for their business — and they picked a great place to start! Phill’s off-the-cuff poll also revealed a wide cross section of industries represented across the delegate base, including all the usual suspects such as aerospace, defence, automotive (elite and road cars) and medical plus a few others besides. As you might expect there was also a strong academic and research contingent.

Talking of ‘usual suspects,’ though, Phil Reeves, from Stratasys Expert Services, opened the Industrial Realities day with a presentation he entitled ‘Understanding the Production Economics – The Harsh Realities of 3D Printing.’  Some readers may understand the double entendre in the reference to ‘usual suspects’ – namely that Phil’s longevity in the additive industry, corresponding depth of knowledge and pragmatic approach sets him up better than most to deal with the ‘harsh realities.’ However, Phil’s presentation utilised the term “usual suspects” throughout to highlight the problems that industrial sectors face when implementing AM for part production, accompanied by suspect police line-up imagery on his slides.

Given that Phil only had 30 minutes, he did a stellar job of raising the issues and challenges that are often seen as barriers to adoption for many companies. After denouncing many of the press promises of AM and 3D printing, Phil highlighted how, in 2017 the reality is more …… conservative and additive technologies are not as widespread as we have been led to believe. The reason for this, Phil stated, comes down to five “usual suspects,” namely accuracy, build speed, part size, part cost and mechanical properties.

It’s hard to argue that these challenges are not still barriers to adoption. I still hear them cited by users of AM tech over and over again. Phil made an excellent point in his summation, however, that all five issues do not have to be solved all at same time. In terms of production applications with AM, the focus should always be on the application, and he believes more and more application specific hardware systems will emerge (think fuel nozzles, orthopaedic implants, hearing aids etc). Additive production systems developed and built for specific parts and components at higher volumes where the economics make sense. In this way, “the machines might cost $8 million, but it doesn’t matter if the value that comes off them justifies that investment.”

I do not think Phil is wrong here, it’s no secret that the huge multi-nationals are leading the charge with additive manufacturing for production applications; their deep pockets for hardware acquisition, integration capabilities and R&D make it a no brainer. That said, opportunities do exist for smaller and medium sized companies with additive manufacturing that should not necessarily be overlooked, but they do tend to involve more risk. This was the message from the presentation given by Sophie Jones, General Manager of AM consultancy firm Added Scientific. The presentation was centred around Sophie’s research, supported by Innovate UK, which included interviewing a number of smaller companies involved with AM in the UK. While it can be argued that this research has a regional bias, I think the barriers to adoption that Sophie identified for smaller organisations are universal.  

The first, and arguably the most significant challenge, cited by all the firms is access to finance. In this regard, the feedback illustrated how banks are reticent about funding for AM, largely because they do not understand the technology base and how to finance it. As a result, Sophie highlighted some hair raising examples of small, privately funded companies taking high personal risks to purchase of machines, it shouldn’t be this way, but if options are limited there is often no other route. Other challenges and barriers to adoption for SMEs raised in Sophie’s presentation included firms requiring back up revenue streams to support AM activities; the issue of global supply chains, while sales were largely domestic; the need to educate customers; the AM skills shortage; and, last but not least, industry accreditation – ISO accreditation is vital, as most customers demand it, particularly those working within highly regulated industries.

Looking to other highlights from across the three days, and one that stood out was an evening meeting organised as an extra-curricular activity by Sophie Jones, by invitation only, for women in AM. It was well attended, by 20 women, a testament to the noticeable increase in women working in this field. However, the fact that this is even an issue that needs highlighting, and that the percentages overall are still low, means there is still much to be done.

Highlights from the conference proper were many and varied. The research into a new additive process being undertaken at Lawrence Livermore National Laboratory (LLNL) — presented by Maxim Shusteff — did stand out. This is a new, faster photopolymer process, called Fast Volumetric Fabrication. The science presented lost me more than once, but a video clip illustrating part formation in the resin bath — in a couple of seconds — blew my mind. I was not alone. There are no layers involved in this, the process is enabled by a truly three-dimensional holographic light source. As always, with new processes however,  Maxim qualified his excitement about this new process (increased speed, no free surface, no substrate, and more predictable/traceable process models) with: “Holography is interesting, and we’ve shown it’s possible, but it has limitations.”  

And the holographic process is not the end of the story either, Maxim also provided a sneak peak at another new process under R&D at LLNL, this one called Tomographic Volumetric 3D Fabrication, which shows promise in terms of eliminating geometric limitations. The research on this process is due to be presented at the upcoming SFF event.

As an aside, after this presentation, someone next to me commented: “makes the ‘Star Trek Replicator’ analogy seem possible.” I disagreed, in the strongest possible terms. And for the record, “Tea, Earl Grey, Hot” — the American script-writers of Star Trek aside, who on this planet needs to qualify that Earl Grey needs to be hot??

In terms of newer, commercial (or nearly commercial) processes there were some very insightful ‘X’ presentations from Neil Hopkinson and Dror Danai of Xaar and XJET respectively. The high speed sintering process itself has been well documented and Neil, as ever, delivered an accomplished presentation; however the Xaar business model both with this process as a service and internal tool continues to intrigue and will, I suspect prove disruptive. Dror’s presentation provided some real insight into the almost-ready-for-commercialisation nano particle jetting (NPJ) process with both metal and ceramic materials. The R&D model at XJET is beyond impressive, I discovered when I talked directly with Dror at the event. The “magic” behind this process lies in controlling the delivery of the nano particles in a proprietary dispersion material. The enabling tool is the proprietary inkjet head, and the temperatures it can withstand. Not a dissimilar narrative to Xaar, actually. Moreover, the anecdote I heard more than five years ago, about “inkjet being the future of additive manufacturing” kept coming back to me during the conference.

In terms of advanced applications highlighted at the conference, delegates were enlightened on some of the intricacies of producing parts for performance bikes for the UK Olympic and Tour de France teams (METRON), Cars (BMW), electronic products (Texas Instruments), and hearing aids (Sonova). There was also a long-term AM vision presentation from Airbus, but this was generic in nature, with no specific applications referenced. While none of these applications are wholly novel in terms of the sectors, the Sonova presentation in particular highlighted the over-arching narrative of progress with AM, and what can be achieved now, compared with when it was first implemented. Sonova, for instance, via its various brands has been producing millions of small production hearing aid parts with plastic AM since 2007. Ten years later, in 2017 the company has transitioned to metal AM – with biocompatible materials and improved functionality — at the same volumes.  This is a really big deal — for the company, for the technology and a great marker of progress for the additive industry as a whole.

I mentioned Xaar’s business model above, and I will be digging deeper into this via a new source just as soon as I get clearance. However, another company that revealed a very interesting business model with AM is Johnson Matthey (JM), a world leading catalyst manufacturer, with core competencies of developing catalytic materials, coating, powder production and ceramics. Funnily enough, the presenter, Samanth O’Callaghan joined Johnson Matthey from Xaar two and half years ago. Regardless, JM after initial research into various AM processes in 2009, initiated a very specific, application based solution for AM by developing a binder inkjet ceramic AM process. It’s another interesting business model, once again based on user evolution, whereby JM also developed and uses its own ceramic materials — not a surprise really, considering the company’s expertise.

Of note during Samantha’s presentation was the positive qualification for using this process, namely the scalability of binder inkjet technology and the facts that it is “faster and cheaper at scale.” She highlighted the significant post-processing requirements, and how porous parts are; stressing that this was actually an advantage for the JM application. Today, JM is able to make a better product, with greater sustainability and cheaper, with its ceramic AM process. The company is in the process of establishing its pilot plant, which will be completed in a few months, and will be manufacturing at scale; “tonnes per year,” according to Samantha, with automated bespoke material handling and an integrated end to end solution.  

The scope of the programme was wide, and the depth of the presentations, individually was so impressive and informative, that it is impossible to do it full justice in one round-up article. However across the three days, four themes kept recurring — in presentations and conversations — notably the skills shortage around AM; Funding; AM integration into factory workflows, both digitally and physically; and how this is often resulting in a hybrid (subtractive and additive) workflows.


The content from the three days has given me, and I suspect all the delegates, much to think about. I certainly have plenty to follow up on and write about for the next few weeks (months?). 

Tuesday, 4 July 2017

The AM Ancillary Problem

OpEd for Disruptive Insight, Issue 6 (unedited)

There is a problem around the Additive Manufacturing (AM) and 3D printing industry that never quite gets enough oxygen but is never far from the surface. It certainly is not going to go away any time soon.

I would be the last person (or at least one of the last people) to dispute the amazing capabilities of AM and 3D printing hardware systems used for industrial applications. I never get bored of watching the faces of people seeing a complex part off an AM machine for the first time, and the incredulous looks increasing as the process is explained to them. And yes, while more infrequent these days, it still happens. (But that’s a story for another day.)

The ability to build complex parts, in one piece, and the advantages this brings of increased strength, lighter weight, reduced material consumption and assembly component consolidation for an increasing range of applications are all well documented and justifiable drivers for this technology group.

However, oftentimes, the focus for these advantages is singularly the additive hardware that build the parts layer by layer. This is understandable up to a point — it’s the enabling process where the advantages listed above materialise — but in reality, for new (and even regular) users, it does not convey the full picture of what is required to get that part “off the machine.”

AM hardware systems are part of an extensive ecosystem of technologies that enbable it, both pre- and post-process. These days there is greater emphasis being placed on the pre-processing discipline of Design for AM (DfAM), file preparation and file format in terms of technology development, debate and awareness. In the previous issue of Disruptive Insight Kruno Knezic addressed some the the issues around design software and skills and highlights some of the progress.

Where there is still shade is around the in-process and post-processing extras — specifically the ancillary hardware that is often critical to an additive process but gets overlooked in terms of its contribution to the end result, the time it adds to the actual build time, the space it consumes and, most notably, the cost it adds to the purchase price — rarely talked about.

This is not actually a new problem born of the many new processes and machines now available on the market. Historically, Stereolithography systems have always required curing ovens, often larger than the AM machine itself. Similarly, the Laser Sintering machines of the 1990’s needed powder handling /removal systems and recycling hoppers and sieves. Not to mention the Personal Protective Equipment (PPE) for machine operators. The post-processing options for plastic sintered parts back then, also invariably required infiltration operations, as well as finishing processes, particularly if aesthetics were important alongside the strength advantages that laser sintering offered. The Fused Deposition Modelling (FDM) process also required finishing processes to eliminate the very obvious stepping effect of the process during its early years —baths of chemicals, and later water baths for water soluble supports  were common requirements, not to mention the endless sanding .

As we head into the final quarter of this current decade, additive processes and the materials used to build parts are considerably more advanced than they were in the 1990’s. I’m stating the obvious now, but the materials palette is much broader; resolution, accuracy and repeatability are consistently meeting the industrial requirements for critical prototyping, tooling and some production applications. What is still frequently overlooked, however, is that these achievements often require secondary processes — that barely ever get a mention. Certainly not in the marketing materials or the sales pitches. As stated above these secondary processes require considerable investment, financially (of course) that can double the price of the actual 3D printer; but also time and floor space.

It is noticeable that the term “post-processing” is often used interchangeably with “finishing” — this is somewhat of a misnomer, actually. With many processes there are a series of essential post-processing steps prior to the 3D printed part finishing stages.

Today, most resin polymer additive processes still require oven curing. Laser sintering and laser melting additive processes still require powder handling equipment. On an industrial scale this can be twice or even three times the footprint of the additive hardware itself. For metal parts, removal from the build plate is a particularly undesirable part of post-processing, and that’s before even starting on the support structures. Moreover, the PPE equipment for metal powder processes is more essential than ever.

But even consider the new, more accessible plastic powder bed hardware from Formlabs. Launched this month, the Fuse 1 system is an industrial desktop machine that offers, proportionally, the power and material advantages of a powder bed fusion system in a compact, more affordable format than alternatives on the market. There is no mistaking that it is a welcome addition to the market — accessibility is one of the major keys that will continue to drive uptake and adoption. But the eye-catching headline price of this system is $9999 / €12098. Or, if you look at the website, it “starts at” those prices. That’s because, when you look at the technical specifications, the actual printer IS that price, but a “complete SLS solution” requires considerable ancillary equipment. Indeed, the complete solution includes the printer, a post-processing station and intuitive software for setting up and managing prints — and costs twice the “starting” price, at $19,999.

It was actually a conversation about the Fuse 1, in this regard, that triggered this article. And it made me think on how often the excitement of a new launch often overlooks the ancillaries issue.

HP did something similar when they launched too, if you remember — launching the Multi Jet Fusion additive system months ahead of the HP Jet Fusion Processing Station, required to again provide the complete solution. The ancillary equipment required for MJF parts post build easily doubles the footprint of the 3D printer, and it’s not that small to begin with, and it adds considerably to the capital expenditure cost.

So it behoves to look around at some of the other new(er) additive system offerings with ancillaries in mind. And actually it becomes obvious that some vendors are aware of the issues with ancillaries and while they are not talking about them, there is evidence that they are attempting to overcome some of them with their tech development. That said, the familiar need to make a trade-off, depending on application requirements, process requirements and budget etc, remains. As it has always been.

Carbon’s CLIP process, launched originally on the M1 3D printer, is a resin polymer process that produces parts that need to be cleaned and cured. The significantly faster speed of the printing process itself, is offset somewhat by these post-processing steps. However, Carbon’s business model goes some way to mitigate this. First, the company’s business model is subscription based, meaning that the the costs include all the ancillary, post-processing equipment (as well as the software updates). Moreover, the 2nd generation of the technology — in the SpeedCell format, with the M2 printer — includes increasing automation for the cleaning phase. It’s all moving in the right direction.

Desktop Metal  is another company addressing some of the ancillary issues head on. DM launched its new powder metal 3D printers with full visibility of the ancillary furnace that is required post-build. In terms of part removal and support removal, the company has addressed this within its technology development to reduce the pain-staking and time required for these post-processing steps. Another trade off.

And then there is Rize: post-processing, or rather the lack thereof, is one of this company’s USP’s. I gave them a bit of a hard time a couple of months back, for using a tagline of “zero post-processing.” At the time, it was about sensationalized marketing, which I posited was actually making potential users more cynical than they might otherwise be. The point I was making is that amid its competition, the truth (ie minimal post-processing, relatively speaking) will get plenty of attention. It’s actually a very big deal when lined up against its cohorts.

The point here though is not about promoting any one technology over another. There is very little point in doing that these days because process selection is (and should be) application driven. The point is to raise awareness of the ancillaries required to make 3D printers work — at any level. It’s kind of like the insurance equivalent of the small print, so — ask the questions, and if possible, talk to experienced users, that’s always where you’ll find unequivocal truth.


Monday, 3 July 2017

GE & AM — A Historical Perspective, Ramping Up and What Next?

Feature Article for Disruptive Insight Magazine, Issue 6 [Unedited].

Everyone has heard of GE — or General Electric. Right? That big American company that makes fridges, washing machines and lights etc. …..

Before the company’s ventures into the additive manufacturing (AM) industry beyond being an early adopter of the technologies, that’s certainly how I thought about it — if I thought about it at all. Said ventures have been coming thick and fast over the past 12 months and I decided to take a closer look and think around it a little bit. 

In broad brush strokes, GE is a huge US multinational company, incorporated in NYC on the Dow Jones stock exchange and is currently in the process of moving its global headquarters to Boston, MA (from Fairfield, CT) — not a small undertaking by all accounts, but the move is scheduled to be completed 2018. The company ranks high on the much vaunted Fortune 500 list, and this year placed as the thirteenth largest company in the United States according to gross revenue figures of $111.5 Billion. The company’s history is a fascinating one, and in my ignorance, I was unaware of its origins which date back 125 years. In 1892 General Electric (which has never changed its name) was formed through the merger of the Edison General Electric Company of Schenectady, New York, and the Thomson-Houston Electric Company of Lynn, Massachusetts. Four years later, in 1896, GE was one of the 12 original companies listed on the Dow Jones Industrial average, and today it is the only original company to still be listed.

As one might imagine, a century and a quarter has resulted in many changes and vast growth for this industrial giant, involving countless mergers, acquisitions and divestments. Far too many to document here, but of note is the sale of the division of the business for which it has traditionally been best known among the general populace — its appliance division, which was sold to Haier Group for $5.4 million at the beginning of 2016.

As of 2017, GE is formed of 10 independent business operations, which are categorized as follows, according to the company:

·      GE Aviation
·      GE Capital
·      GE Digital
·      GE Energy Connections
·      GE Healthcare
·      GE Lighting
·      GE Oil & Gas
·      GE Power
·      GE Renewable Energy
·      And, the most recent — GE Additive.

GE, more specifically GE Aviation, is one of, if not, THE most prominent example of AM user evolution. This division of the company has been using additive technologies for more than two decades, and was among the earliest adopters. Tales of the earlier history with additive can vary different depending on who you listen to / speak with from GE Aviation. Most recently, I heard GE Aviation’s CEO, Mohammad Ehteshami, speaking at the Materialise World Summit (MWS) in Belgium, about GE’s initial foray into additive manufacturing both in house and via a local service provider in Cincinnati, one Morris Technologies. Since hearing him speak, much of the content of his presentation has also been published in a couple of GE Reports with some delightful perspective and further details.

The MWS presentation and the reports provide the historical context of GE’s evolution with additive technologies under Ehteshami’s leadership. He has been with the company for 31 years, no less, and in that time he has steered the development of one of the world’s largest and most powerful jet engines.

GE Aviation’s relationship with Morris Technologies, itself led by Greg Morris whose reputation across the AM industry is legendary, began back in the 1990’s in the traditional way — for engine prototypes that could be iterated rapidly. Over time, as the additive processes and materials improved, and experience increased, projects progressed — as did the relationship with Morris. Ehteshami and his team were developing the LEAP engine at this time, and had hit a roadblock with a complex part that required a multiple component assembley — the now famous fuel nozzle — and considered the possibility that additive manufacturing might offer a solution. But they didn’t know how, but they knew a man that might.  

The story goes that “[t]hey swore Morris to secrecy and sent him the computer file with the drawing of the intricate nozzle tip. He printed it from a nickel alloy and invited the team over a few days later. ‘I remember that day like today,’ Ehteshami says. ‘I was excited but also disturbed. I knew that we [had] found a solution, but I also saw that this technology could eliminate what we’ve done for years and years and put a lot of pressure on our financial model.’”

So (relatively) quickly, Ehteshami took action, as he relayed at MWS: “And we bought the company” in 2012. And indeed this was really the first compelling sign that GE was serious about AM in a different way to its aerospace cohorts. The news of the Morris acquisition got a great deal of media and industry attention at the time, as you might expect, but it was all focused on the part — that fuel nozzle, and by default the LEAP engine. What I suspect was not fully understood back then was GE’s big picture vision for AM.  

The past 12 months have gone some way to fill that picture in.

It was about this time last year that GE Aviation set the AM and 3D printing industry alight once again, with the news that it was set to acquire two European metal AM vendors — SLM Solutions (Germany) and Arcam (Sweden). Negotiations didn’t quite go according to plan, but the end result was similar when the $1.6 billion deal went ahead with the acquisition of a metal powder bed fusion technology company, Concept Laser (also in Germany), and the electron beam melting technology company, Arcam. There has been much written and debated about the size of this deal ($), and, more pertinently, about the many implications for the AM industry itself in terms of metal AM competitors and critical users of these two acquired brands. There are some arguing that GE is setting up to monopolize the metal AM part of the industry, particularly for aerospace applications, but others see it differently, arguing that it will drive developments, applications and, ultimately, adoption across the entire industry.    

Personally I am still on the fence, it could go either way but the aerospace angle here cannot be overstated. GE certainly was a client of Renishaw and EOS, indeed the LEAP engine fuel nozzles are currently qualified on EOS machines. How long it will take for them to transfer this to the Concept Laser systems — if indeed they do / can — remains to be seen.

At this point it is hard to argue that GE is not seeking to at least dominate this sector. Since the acquisitions, GE has gone on to separate its focus on additive out from the Aviation division, with the establishment of a dedicated division of its own: GE Additive, towards the end of last year. This independent division quickly went on to make a series of impressive launches including opening the first of several Customer Experience Centers, in Munich, Germany. The intent is to set up a center of AM excellence, furnished with around 10 AM machines from Concept Laser and Arcam and operated by up to 50 GE Additive employees to provide services as well as hands-on training and instruction for customers.

The further intent is to replicate this model all around the world to “expose and engrain the additive technology to manufacturers worldwide,” according to Robert Griggs, general manager of the Customer Experience Centers for GE Additive. So while aerospace will still be a dominant application, it certainly is not the only focus. With the Arcam platform in particular, medical applications are proliferating along a similar growth curve. This point is supported by GE Additive’s announcement just this month, of its formal collaboration with Stryker.

Talking of AM announcements this month, GE has been prolific – yet further indicators of the dedication and focus to this technology field. GE Additive has, in just a few weeks, announced: that it has added its proprietary Predix platform to Concept Laser machines; the aforementioned partnership with Stryker; a similar collaboration with Oerlikon; an education funding initiative with 400 schools to receive 3D printers; and perhaps most significantly, based on all its newly acquired IP plus decades of knowledge, GE is developing its own new, large frame metal AM machine. Designated ATLAS, this powder bed system is being developed to build parts up to 1 metre in the X & Y axes.  

Despite the size of and funding available to GE it is particularly interesting to note that partnerships / collaboration are still a priority. The newest relationships, with Stryker and Oerlikon are still to bear fruit. But once again, GE’s history in this regard highlights the real opportunities that exist.

Also just last week French Aviation company Safran announced that it had obtained certification for a critical aerospace, metal additively manufactured gas turbine engine part from the European Aviation Safety Agency (EASA). The part — a nozzle — is a core component within an auxiliary power unit (APU) for the Leonardo AW189 helicopter. This successful certification means that Safran can roll out the nozzles across other turbine models, validating additive manufacturing as a means of production for these high-stress parts.

Reporting on this development, Safran disclosed that the nozzle was produced using the Selective Laser Melting (SLM) process with a hastelloy X (nickel-based) material. Moreover, the part is now 35% lighter than its conventionally machined predecessor and has consolidated an eight-part assembly into a four-part assembly.  

Sound familiar?

It’s really not that surprising when you learn that the Safran nozzle comes from CFM International, a decade old collaborative venture between GE Aviation and Safran Aircraft Engines.

GE’s additive growth trajectory in recent years has been phenomenal. Key to this is that it is not linear, but the result of a multi-faceted approach to the entire ecosystem of technologies driven by high value applications.


Where GE Additive goes from here is mighty hard to second guess, so I will leave you with GE’s own words from its Investor Relations page for 2017: “We’re not done yet. Expect continued transformation in 2017 and beyond.”