Archive for Cerberus 3D printers

The mystery of the 3D print fail

Overheat screen for 3D printer - Kevin CaronIt starts out so innocently …. Doesn’t it always, especially with 3D printing!

I wanted to print something using NGen_FLEX (usually called “Ninjaflex”) rubber filament on my 8-foot-tall Cerberus 3D Gigante printer when I got a “Runaway temperature warning” (right), and the printer shut down.

I checked the graph in Simplify 3D, the combination host and slicer program I was using, and saw the temperature spiking instead of its usual gradual climb.

I shut off the 3D printer, let it cool, and tried it again. Same problem.

I printed the same file with regular PLA and had no problem.

There was only one thing to do …

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Tinker time for all ages: event turns on young and old

3D printing at Arts & Technology event in Surprise, AZ - Kevin CaronWhen you’ve done something for a while, you start to take it for granted.

There’s nothing like talking to others about 3D printing – and, best of all, showing it to them – to remind me how remarkable this technology is for many people.

Recently, my wife spoke with a woman who had never even heard of 3D printing. That’s pretty mind-blowing.

Most of the people who attended the inaugural “Technology & Art: A Tinker Time For All Ages” on Saturday, October 21 had heard of it but never seen a 3D printer in action.

They have now….

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3D Frankenstein: Gigante 3D printer gets a new brain

When I commissioned the creation of my 8-foot-tall Cerberus 3D Gigante 3D printer 3 years ago, I knew that the technology would change.

Of course, technology changes all the time, but in the fast-moving field of 3D printing, it changes as fast as you can type.

As chronicled in this blog, Cerberus 3D “mad scientist” and all-around cool guy Steve Graber and I made a lot of changes in the Gigante as we worked through the issues that arose when using the printer. Software, hardware and filament all demanded tweaking, and finally we got the Gigante running well.

There were still issues, though. The biggest was a tendency for the print to just … stop. The printer would freeze, and the computer would join it, stuck in some sort of limbo while I pulled my hair out trying to figure out why I’d just lost yet another print.

Sometimes it was simply that the computer, which is dedicated to running the Gigante, decided to update. I dealt with that by always firing up the computer well before I started printing. OK, that worked most of the time.

Finally, though, it became clear that the processor just wasn’t handling the information fast enough ….

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Art takes 3D printing seriously at ASU

3D Systems ProJet 660 3D printerOne of the strongest intersections of art and 3D printing is taking place right here in Phoenix at Arizona State University.

I first encountered Dan Collins, who is a professor of Intermedia in the School of Art as ASU and a co-director of the PRISM lab, an interdisciplinary 3D modeling and rapid prototyping facility.

Dan has been involved in 3D printing for a long time. He was involved with TeleSculpture, which was held in 1999, 2000, 2001, 2003, 2005 and 2007, in which artists would simply send in their designs, which would be printed remotely for the show, an incredibly innovative idea, one certainly ahead of its time.

(You can read more about Dan’s activities and involvement by clicking on his name above.)

What Dan and his team have done is amazing ….
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Sharing 3D-printing possibilities

Some artists hold their processes close to their vests (where did that expression come from? Who wears a vest anymore? Sorry – mind wandering ….).

I’m not one of them.Arizona Artists Guild logo

I have a large and active YouTube channel with more than 450 videos in which I share metal fabrication and 3D-printing tips. I also have held many events for other artists at my studio and at my home, where I have my 3D printers (the studio is just too dirty – I make dirt there!). I’ve even held events for other artists at my art shows.

So when the Arizona Artists Guild asked me if I’d do a program for the organization’s sculpture group, of which I’m a member, I was glad to do it.

But this time, I decided to do it a little differently ….

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Stick this! Adhering a 3D print is key during printing

3d printing-lifted corner - Kevin CaronOne of the challenges of 3D printing that I think – knock on wood – I’ve finally worked through is adherence to the print tray.

There’s nothing more frustrating than having a 3D print come loose from the tray while a print is underway, and it’s something that’s happened to me far more times than I even like to think about.

The Cerberus 3D Gigante’s large format prints are particularly prone to this problem – I have a few large prints the corners of which have “flipped up” slightly because they cooled faster than the rest of the print. See an example to the right – fortunately in this case, it works with the concept and theme of the sculpture!

Sometimes, though, a lifted corner ruins the print altogether.

Other times, on any of my printers, a 3D print simply comes loose from the print tray – then it’s game over.

But I’ve learned a few things and updated some to improve my quality and finish rate ….

 

My 3D Systems CubeX came with some sticky stuff that I used on that 3D printer until I got my Cerberus 3D machines, when I learned about using hairspray. Yes, hairspray. (I’m sure they wonder at the grocery store when I buy three or four cans of Suave Extreme Hold hairspray. I just smile.)

Suave Extra Hold Hair Spray - 3D printingI still use hairspray – more on that in a moment – but I’ve gotten away from using blue tape. That was the other trick I learned when I got my Gigante. I’d apply painters’ blue tape – the kind that is supposed to release easily – to the print tray, pressing down just as hard as I could. It worked sometimes, but not always. Also, not all blue tape is created equally, apparently.

I don’t like the blue tape because

  1. It is hard to get off the tray
  2. It’s especially difficult to get off the sculptures
  3. It doesn’t always seem to work.

What seems to work best is a heated tray. That’s why I added one to my CubeX and another to the Gigante. 3D prints adhere much better with heat! I don’t think I’ve had a problem with large format prints lifting up since I installed the heated tray on the Gigante.

Of course, you don’t just use heat. Before I start a 3D print, I also clean the print tray well, then spray it liberally with hairspray before I start printing.

Of all the challenges with 3D printing, I think – THINK – I have this one licked.

What I don’t need to do when 3D printing

Artist Kevin Caron standing beside his Gigante 3D printerDuring my recent art show when I had my Cerberus 3D Gigante 3D printer running, several visitors asked whether I just pushed “go” and walked away while printing.

After I finished laughing, I’d explain that running this printer is like having a 3-year-old. You can never entirely take your eye off of it, and sometimes it requires extra care, other times it needs discipline. (I haven’t spanked yet, but I’ve sure thought about it.)

All of that is to say there is plenty to think about when a print is under way.

A few months ago, my business manager asked me if it would make sense to keep a log of my prints. For instance, she thought maybe I could note when I started the print, when I changed spools, etc. I could even track when I turned on the fan, what speed I was running at for how long, and other such details.

“That’s probably the last thing I want to do!” I replied ….

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Test driving a new – old – host program on a big 3D print

Pronterface screen, 3D printing - Kevin Caron's 3D printing blogDealing with sudden, inexplicable fails got me to try some new things. I don’t know which, if any, are related to why my Cerberus 3D Gigante 3D printer just stopped cold without apparent reason, but it sent me back to play with a host program I’d only used once or twice before.

In fact, when my 3D printing guru suggested I use Pronterface instead of Repetier, which we thought might be the problem, I remembered I had a version of it. It was old, so the first thing I did was download the latest version of this venerable – well, for 3D printing! – host program.

Pronterface is apparently one of the most common interfaces used by 3D printer software. It can move and home all 3 axes independently, as well as offering a temperature graph, extrude and retract buttons, a window showing the current layer’s tool path, and a window to enter G-code. Some users complain that it’s too basic or don’t like the program’s look and feel, but it seems very clean and easy to use to me.

The big question is whether and how it works ….

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Double trouble: Is it original or a print?

Multiples of Sunscraper, a 3D printed fine art sculpture - Kevin Caron Most people who have wondered if 3D printed sculptures are art have now realized that 3D printers themselves are simply tools, like paintbrushes, potters’ wheels and cameras.

With 3D printing, however, some people continue to fear that once artists create their original CAD designs, they will then simply print popular sculptures over and over, creating the sort of “copies” 2D artists make with offset prints and giclees. Many in the art world are bothered when artists offer inexpensive (or sometimes not so inexpensive) copies of their work this way.

For me, although it is, of course, technically possible to print multiples, whether to do so is really a philosophical issue. I had to consciously consider and develop this philosophy as a lodestar for my 3D-printed creations.

Sure, once a design has proven popular, I could simply reprint multiples, but that isn’t something I choose to do any more than I do it when I create sculptures in metal. In metal, it is a little trickier to recreate a form exactly, which would be quite easy with 3D printing. Still, I think there are issues for patrons if they feel they are not really buying an original.

My philosophy is straightforward, but took a little time to think through ….

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String theory: removing strings from a 3D printed sculpture

Close up of 3D printed sculpture Love and Marriage - Kevin CaronPrinting big sculptures on my 8-foot-tall Cerberus 3D Gigante printer is a balance of heat and cool.

As discussed in a previous post, I installed a heated bed on the printer, which helps keep the base of my large format 3D-printed sculptures adhered to the bed during the multiple days of many prints. (Some prints have taken four days. Keeping an eye on a print that long 24 hours a day, switching out spools of filament, adjusting speeds, etc., is definitely not for the faint of heart!)

As the sculptures print, though, I cool them down with fans. My fan of choice right now is a 4-foot-tall oscillating tower fan.

The cooling is especially important when the upper sections of a sculpture narrow, as many of mine do. When they narrow like that, I also turn down print speed to avoid burning on any edges.

The result is spiderweb like strings, or threads, that cool as the hotend moves. They sometimes run between sections almost like the warp, or horizontal threads, in a weaving ….

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