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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 I’m 34 years outdated from Lexington, Kentucky.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 night time, 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 massive SLA resin and Objet printers to create and take a look at printer components and fixtures earlier than releasing merchandise to market. With the ability to create and take a look at components shortly was essential for me at work and, in 2015, I bought my Lulzbot Mini so I might create components at residence. 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, at present, like many theme parks are shifting increasingly more in the direction of digital projections, however in my view, nothing beats a bodily determine shifting, 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 do 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 an ideal place to begin to make sure I might design and print purposeful components. 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 primarily based 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 finding out them for a bit, I noticed the animatronics wouldn’t be as advanced as my final venture, however it will undoubtedly be problem to check my 3D design and printing abilities. 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 authentic Disney Animatronics.
The totem design makes use of a majority of Matterhackers PRO PETG, with PLA and a few ABS used as nicely, in smaller quantities. The totem pole construction, high, and base are all made out of PETG. Why was PETG the suitable materials for this job? PETG has an ideal mixture of sturdy layer adhesion, minimal warp whereas printing massive components, larger glass transition temperature, together with being way more sturdy and far simpler to post-process in comparison with PLA. This allowed for very massive components to be printed with out worrying about layer splits (extra frequent in massive ABS prints), breaking printed items as a consequence of brittleness, and being able to have components flex to create tight matches.
Test this hyperlink to see the Tiki undergo its “present” (Word: on the time of publication, paint has not been absolutely utilized but): https://youtu.be/DhtXnlpF3e0
After utilizing PETG for this venture, there are just a few suggestions I’ve realized via experimentation with the fabric in addition to from others.
Epoxies and different glues will NOT bond to PETG. It’s worthwhile to use a particular solvent used for acrylics. I used SciGrip Weldon #4. Word 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 greatest. Nevertheless, it dries inside a couple of minutes.
I used to be in a position to bond PETG components collectively simply in addition to bonding PETG components to PLA components (though the bond isn’t fairly as sturdy 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. Make sure you set your slicer’s circulation % as little as doable that also provide you with a stable first layer. That is very true of components with massive preliminary floor areas. Upon 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 need to follow the nozzle more-so than ABS or PLA. In the event you’re experiencing this challenge, strive decreasing your circulation price a bit and ensure the Z peak is appropriate.
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. In the event you’re trying to put up course of your prints, preserve this in thoughts if attempting to determine between PETG and PLA as a consequence of their related anti-warping properties. Sanding these pesky layer strains out of PETG will probably 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 likely trigger a spot between prints in case you’re adhering two components of an meeting collectively. To fill gaps or seams, utilizing ProBond Wooden Filler works amazingly nicely. 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.
Due to @UncleJessy4Real for initially declaring this nice filler product to me.
PETG paints nicely when first coated with a sprig can primer. The Speaking Tiki is coated with Rust-oleum Common Bonding Primer. I used to be then in a position to paint the components utilizing customary acrylic paints and a protecting clear enamel coat to guard the paint.
Total, I’m more than happy with how PETG labored for my venture. Whereas it does have its personal challenges, similar 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 last piece of general recommendation: Pursue a venture you’re extraordinarily keen about. You usually tend to push your self, study from errors and check out once more, and put within the required effort and time if you find yourself actually “addicted” to your venture. Discover that venture that matches what you’re keen about 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 looking for #talkingtiki.
Do you’ve cool venture the place you employ a particular MatterHackers filament? Tell us within the feedback beneath or ship an electronic mail to help@matterhackers.com.
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