3D Printed Animatronic Speaking Tiki Statues

My identify is Jim Leemhuis. I’m 34 years outdated from Lexington, Kentucky. By day, I’m a mechanical engineer serving to design laser printers for Lexmark Worldwide Inc. By evening, I spend my time 3D printing, coding, and assembling animatronic figures.

I’ve spent the final ten years utilizing 3D printing to go with my design work at Lexmark. We use giant SLA resin and Objet printers to create and take a look at printer elements and fixtures earlier than releasing merchandise to market. With the ability to create and take a look at elements shortly was essential for me at work and, in 2015, I bought my Lulzbot Mini so I might create elements at dwelling. I discovered I might flip round designs for work in a single day and guarantee they labored earlier than utilizing the bigger (and extra pricey to run) SLA/Objet printers at work to print the ultimate working.

I’ve all the time had a fascination with Disney audio animatronics from a really younger age. It appears, as we speak, like many theme parks are transferring an increasing number of in the direction of digital projections, however for my part, nothing beats a bodily determine transferring, speaking, and interacting in entrance of you. I knew after I was older that I might attempt to construct my very own animatronics. 3D printing, together with open supply platforms like Arduino, has allowed me to try this.

My first main animatronic venture was an audio animatronic bust with a Haunted Mansion theme. This was an enormous leap into open supply electronics and a fantastic place to begin to make sure I might design and print useful elements. You possibly can see a video of the ultimate venture right here: https://youtu.be/g5WGrtmRxQU

As soon as I had efficiently accomplished my Haunted Mansion audio animatronic, I knew I wished to do a venture based mostly on the primary present to make use of audio animatronics, Walt Disney’s Enchanted Tiki Room. Everybody I do know loves the chanting tiki totems within the present. After learning them for a bit, I noticed the animatronics wouldn’t be as complicated as my final venture, however it will undoubtedly be problem to check my 3D design and printing expertise. I had seen individuals who had designed and printed tiki poles earlier than; however nobody I knew had taken on the problem of recreating an enchanted speaking tiki totem that included movement, audio, and synchronized lighting. It’s can be my very own small tribute to these unique Disney Animatronics.

The totem design makes use of a majority of Matterhackers PRO PETG, with PLA and a few ABS used as effectively, in smaller quantities. The totem pole construction, high, and base are all made out of PETG. Why was PETG the fitting materials for this job?  PETG has a fantastic mixture of robust layer adhesion, minimal warp whereas printing giant elements, larger glass transition temperature, together with being way more sturdy and far simpler to post-process in comparison with PLA. This allowed for very giant elements to be printed with out worrying about layer splits (extra frequent in giant ABS prints), breaking printed items attributable to brittleness, and being able to have elements flex to create tight matches.

Test this hyperlink to see the Tiki undergo its “present” (Notice: on the time of publication, paint has not been absolutely utilized but): https://youtu.be/DhtXnlpF3e0

After utilizing PETG for this venture, there are a couple of ideas I’ve discovered by way of experimentation with the fabric in addition to from others.

Epoxies and different glues will NOT bond to PETG. It’s essential to use a particular solvent used for acrylics. I used SciGrip Weldon #4. Notice that this solvent has the consistency of water and must be utilized with an applicator with a skinny needle. It is best to have good air flow when making use of this solvent. Making use of open air is finest. Nevertheless, it dries inside a couple of minutes.

I used to be in a position to bond PETG elements collectively simply in addition to bonding PETG elements to PLA elements (though the bond isn’t fairly as robust as PETG to PETG) utilizing Weldon #4. Thanks, @keebie81, for telling me about this nice solvent!

In my expertise, PETG will be very delicate to over extrusion. You’ll want to set your slicer’s circulate % as little as attainable that also provide you with a strong first layer. That is very true of elements with giant preliminary floor areas. After getting it dialed in, nevertheless, it prints with none challenge. This additionally minimized the probabilities of PETG materials sticking to the nozzle throughout printing. PETG appears to wish to follow the nozzle more-so than ABS or PLA. For those who’re experiencing this challenge, strive decreasing your circulate fee a bit and ensure the Z top is right.

PETG and ABS have very related sanding properties. By testing, I’d rank ABS best to sand with PETG in a really shut second and PLA in a distant third. For those who’re seeking to publish course of your prints, hold this in thoughts if attempting to determine between PETG and PLA attributable to their related anti-warping properties. Sanding these pesky layer traces out of PETG shall be a lot faster than PLA.

Whereas warping throughout printing with PETG is minimal, you should still expertise a small quantity on bigger prints. This will trigger a niche between prints in case you’re adhering two elements of an meeting collectively. To fill gaps or seams, utilizing ProBond Wooden Filler works amazingly effectively. It’s simple to use together with your finger, cleans up properly with water, dries shortly, and sands flush to the half extraordinarily simply. I used this to fill in all my seams on my Tiki totem meeting.

Because of @UncleJessy4Real for initially declaring this nice filler product to me.

PETG paints effectively when first coated with a twig can primer. The Speaking Tiki is coated with Rust-oleum Common Bonding Primer. I used to be then in a position to paint the elements utilizing commonplace acrylic paints and a protecting clear enamel coat to guard the paint. 

General, I’m very happy with how PETG labored for my venture. Whereas it does have its personal challenges, corresponding to gluing; the minimal printing warp, ease of sanding, elevated half power, larger glass transition temperature, and half flexibility greater than outweigh the challenges.

My ultimate piece of general recommendation: Pursue a venture you’re extraordinarily obsessed with. You usually tend to push your self, study from errors and take a look at once more, and put within the required effort and time if you end up actually “addicted” to your venture. Discover that venture that matches what you’re obsessed with and don’t stop till you obtain your purpose!

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 Observe together with Speaking Tiki progress by following Jim on twitter @jimscuba2386 or following the venture on Twitter by trying to find #talkingtiki.

Do you’ve cool venture the place you employ a particular MatterHackers filament? Tell us within the feedback under or ship an electronic mail to help@matterhackers.com.