Champaign-Urbana Community Fab Lab
Champaign-Urbana Community Fab Lab

3d Printing

Messing around with Tinker Cad, I first made this really ugly castle. I was just trying to use each of the shapes once or twice and get a feel for the program. 

I learned how to 3d scan by scanning this castle/building model.

And I used the Kinect and Meshmixer to scan and edit this 3d model of myself. IMG_1329

 

Approaching this assignment, I thought I wanted to follow the prompt of making something of cultural significance and make a calavera. My family is Mexican, and the Day of the Dead is a special time to remember those who have passed and to celebrate their lives and memories. Calaveras are decorative skulls made of sugar and used to celebrate Dia De Los Muertos on November 1st. I started making a skull in Meshmixer and while I don’t have a photo..trust me, it looked like mush. 

 

Then I tried in TinkerCAD

 

And while this was a lot closer, it just wasn’t what I was looking for.

This is when I switched prompts. I decided to make a piece I needed. I have a Pilates ball that is missing it’s cap, so once it’s inflated the air just seeps right out.  Link to design: 

Here’s the ball and the tube that I use to inflate it.

 

I measured the diameter of the tube, and made a version of it on TinkerCAD that had a cap at the end. The cap is made of 2 diamonds. And I made 2 versions just in case the first didn’t work.

 

When I went to go print it, I ran into a bunch of problems. First the printer wasn’t working, then the next printer didn’t work. Then all the architecture students were using the printers, so when I finally got one and printed, I realized there was a major flaw with my design: the tube was too thin to be printed.

 

And so after printing this disaster, I hit the drawing board again. Quickly!

I made the tube thicker, and printed vertically without the supports. 

 

Finally, I had my plug! 

And while the woman at the BIF lab was taking the bottom part off..

 

 

it snapped.

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3D Print: Brandon Steinman

My goals for this project were to learn more about 3D printing/scanning and 3D modelling software (namely, blender, since I’ve been wanting to learn it for a long time). As for the work I put in during class time towards learning these, this is what I have to show:

A tinkercad castle, and

A 3D scan with some meshmixer work done on it.

 

As for the assignment, I did the silverware part, where the idea was to create a set of silverware that are impossible to use. I used Blender to do this, and learned about the basics as well as some more specific tools, like the object modifiers tool.

Obviously, these would be pretty difficult to deal with.

 

For the 3D print that I did, I made a part that would help to organize my desk a bit better. This was a fitting to the edge that I could hang light stuff from, like earbuds. Or some other small and light items.

The tolerances were off, so it doesn’t fit super well. Either way, the print worked! We had to flip it on the side, which means the layering would probably cause the hook to shear off with much weight applied. Something to consider for next time.

 

Finally, I attempted to scan and change a piece of traditional Peruvian art, a necklace that a friend had given me a while ago. Unfortunately, it was a bit small. I tried scanning it on a larger object, but it still didn’t pick it up well. So, I decided to go into blender. My “scan” was putting the necklace on the screen and tracing the outline. Unfortunately, my intended changes to the surface didn’t work out, even though I’d been able to successfully take the differences of objects earlier. Oh, well.

 

I tried to upload the tinkercad .obj file, but the site was undergoing maintenance when I tried to post this 🙁 .

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3D Printing Project: Headphone Hook

For the 3-D design learning part of the class we started learning TinkerCAD and Sculptris in class by making a monster and 3-D scanning our faces. Some other designs I made as rough drafts during the first week included replicating Picasso’s “The Old Guitarist” using TinkerCAD, making a Fasching mask as a cultural artifact using Sculptris, and a rough draft of a headphone hook on TinkerCAD using the scribble feature.

        

 

Fasching masks are made using wood in Germany to scare off evil winter spirits around springtime and are worn during Karneval. I really wanted to move forward with this design and edit it some more to 3D print the mask but it would’ve been very difficult printing the design because it would have needed a lot of supports and it would have had to be big enough to fit my face which I would have utilized 3D scanning for too. Since the mask wasn’t something that would’ve been good to 3D print, I decided that for the final assignment I would make a part I need from scratch that addressed a clear and present need. I don’t have a good place to put my headphones and have been unable to hang it up because I can’t use nails, and the headphones are too heavy for command hooks.

 

So I decided to make a specifically shaped headphone hook that would go through holes on the side of my desk so that I would be able to hang my headphones on my desk. I sketched my design and measured the desk and headphones for dimensions. Then using TinkerCAD I created my design using many cylindrical shapes. The first design was a rough draft that I ended up changing a few things on such as dimensions and shapes used before printing.

 

I printed my 2nd design at the Fablab on the PLA FlashForge printer Pascal with help from the staff. This was a pretty small design so it used less than 4 grams of material at 60% fill. The first time we tried to print it, the material wasn’t sticking to the plate correctly which resulted in a messed up print. When I noticed it wasn’t printing correctly, I let the staff helping me know and they restarted the print and fixed the problem. The second time printing went well and the design I had made was printed in the correct dimensions, however it wasn’t very stable and needed more support to hold up the headphones correctly. So I went back and edited my design to include a little extra part that would balance the hook out and make it more stable.

 

For the third print for my 3rd design I went to theBIF Makerlab and printed the final design there using the Ultimaker 3 3-D printer. 

The maker lab Guru’s there helped me print my design. However, another issue I ran into was that the added piece made the hook not fit inside the desk correctly because the added piece was slightly too long to be able to go in and up the hollow part of the desk. This was really frustrating because when measuring the desk hole I wasn’t able to see exactly how it’ll fit going up/down inside which made measuring and designing this part very difficult. So then to avoid printing something that was slightly too long or short I used a hand file and eventually a electric nail file I have to shorten the part until it fit inside the hole perfectly.

Looking back I wish I would have used mm or cm instead of inches during the design process because the design was so small and very particular in size. This wasn’t an issue with the original part but being a little off in the measurements of the added part made the design not work. In the end I got my final product which is functional and met my particular need of having a headphone hook that worked with my desk.

 

           

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3D Printing and Scanning Project

Subtitle: Sometimes you try really hard and then realize the simplest idea is the easiest.

 

Finished product!

 

Its a little piece of plastic essentially meant to act as a little splint for my injured headphones. Dimensions/curve matched to fit my headphones specifically, with little grooves in the back so I can secure it with rubber bands. 

Here it is in action (in retrospect, probably should have chosen a color other than black, because it doesnt show up super well in photos. 

 

OTHER IDEAS:

This is the one done in class:

The other two options I ended up not choosing were the cutlery set, and the remixed cultural piece.

The cultural piece I admittedly spent the least amount of time on. I was going to do something with Malaysian/Singaporean/Chinese roots, so I gathered some icons from each- Merlion, traditional Chinese lion, headset from the lion dance, I was hoping to find a 3D scan of the Batu Caves in Malaysia, but no can do. i spent some time trying to mash stuff together but i.. it just didn’t turn out very well. I have a few screenshots here and there, but I wasnt very happy with how most of it went, so it looks pretty untouched.

The cutlery set was a real option. I started out with “cutlery that is intentionally inconvenient but still usable”, and then just ended up with “all the cutlery in one piece of cutlery”. Granted, its still a little inconvenient to use, I think, but it is very compact. Good for camping and the like. The handle is the knife (with a sheath, of course), and you would probably be able to slide the prongs of the fork back in.

AND THEN. My headphones broke, and I dropped both of these ideas to work on “something you need”, instead. 

This is a physical photo of my headphones after the incident, featuring my excellent rubber band engineering abilities. 

I don’t actually have a picture of it dangling freelly, but in a very rough sense, the ear-parts of my headphones can swivel, and the plastic swivel part snapped, leaving only the cable holding the ear piece attached.

My astounding mspaint abilities at work, explaining to someone what had happened. Blue being the plastic part that had snapped, and the black being the cable.

The original plan was something like this 

I’m not an art major, but clearly, I should be.

Something like a cast, wrapping around. 

So, game on. Originally, I was going to try to get a 3D scan of the headphones, and then build around that. Seemed easy enough. [ It was not. I don’t have photos for most of this, but I swear it happened]

I first tried downloading a scanner app on my phone (Scann3D, from the assignment doc).  It did not go well. I didn’t have a good setup for scanning, and either way the headphones didn’t seem to register well, and it kept picking up on literally anything other than the headphones. At one point it even pretty accurately recreated my keyboard, in the background of the photo, rather than the headphones.

I then went up a level, and tried using the fancy scanner in the Fab Lab, getting help from Colton. He was extremely helpful and great about it all, but ultimately even that gave us only partial bits and pieces, and I would have had to sit there and manually piece everything together. He then suggested making a 3D mold with clay, on the headphones, and simply scanning that, then cleaning it up. Which was a fantastic idea! So, I ordered some clay off of amazon, and waited.

Upon starting working with the clay, I realized that the piece would probably be too small to scan well, and I might be better off getting dimensions instead.

(…. It is worth noting that I… just, kind of forgot, I could probably have looked up the dimensions online. Just know that I completely forgot that until after I had finished the first prototype.)

I tried to get the right dimensions and etc off of the headphones. Here is a photo of me getting dimensions using the clay.

 

But not with a ruler, because apparently I don’t own a ruler, so I was trying to use my multitool for scale. I also decided against a cast setup, at this point, and instead started going for more of a splint. No wraparound, just a piece at the bottom that would essentially hold the earpiece up, and a top part curved against the band of the headphones. I was still debating on how I would keep it secured at the time of the first prototype.

Anyway, by now it was approximately Monday and I knew I had to start printing, so I gave up on the clay dimensions, went to MakerLab, and just sat there with a ruler.

And it worked! So first, I recreated the headband of the headphones using a ring, and matching it to the diameter of the headphones. I couldn’t get the thickness of the ring right (so definitely no cast, or anything else that wrapped around), but the height and curve seemed right.. I spent a while fiddling, and then printed my first prototype.

It worked okay! I was very excited, but there were two issues: The bottom hook-ish part, as pretty thin, and was also what was holding up a majority of the weight. In addition, it didn’t really have a way to stay adhered to the headphones, although I realized combining this piece and my current rubber band setup made it REALLY secure. 

 

This in mind, I made my second iteration: thicker (all over), and little hook things on the back so I could use more rubber bands to horizontally lash it in place.

This iteration (which I picked up the next day because I hadn’t had time to stay and wait) actually was… worse. Thickening it had messed up the curve, so it could no longer sit flush against the headphones, and the hooks had turned out funky.

This is the only pic where the hole is visible- thats meant to be there if I want to loop something through to tie it down, but the hooks mean to take the place of that. I just kept it there jic.

So, I made a third- and last iteration. I went back to my old design (I’d saved it in a separate file before making changes, thankfully), just thickened the bottom layer, and then, instead of hooks, made grooves.

 

Here it is in action on my headphones. + the rubber banding in the grooves.

And all of it together: 

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Jacob Pruiett 3D Printing

Part 1:

My TinkerCAD model for a Wizard’s Tower and a 3D scan most terrifying. Unfortunately my meshmixer model for the wizard’s tower was deleted/lost, so I can’t upload a picture of it anymore.

 

Part 2:

For part 2 I chose to do the following three assignments, and worked on them in this order: I made a wolverine style set of cutlery in TinkerCAD, made a rendition of The Scream using my 3D scan in meshmixer, and finally I needed to 3D print a part for my RSO, iRobotics, so I made measurements for and designed a cover in SolidWorks, since that’s the CAD my RSO uses most often. I had also wanted to try using a different software for each different assignment, in order to get a different taste of each method.

 

To start: The Cutlery

I started by first creating some brass knuckle styled grips as a base for all of the utensils to attach to. I quickly decided I wasn’t a huge fan of TinkerCAD due to how imprecise everything was, despite being presented in a familiar CAD style. It just rubbed me the wrong way. The four finger holes were just made with cylinders, but the palm grip was a pain. after some finagling, I found the scribble tool and decided to use that, since even though it was imprecise, it didn’t look that bad in the end.

The first utensil I end up making was the fork. I first made the side profile using the scribble tool, then turned it over, stretched it, and cut out prongs and a handle using cubes and cylinders. Overall I think this was my best looking one, as it came out looking pretty good.

The knife didn’t end up quite as pretty. It was made purely with the scribble tool, and it shows. My artistic expertise is unmatched. Overall not super satisfied with this one, but I’m not very sure what method I’d use to make a better version.

Next up is the “spoon”. I decided to combine all three spoon heads together because imagining someone trying to eat with that makes me giggle. It was a simple enough design using some cylinders and half spheres, that were in turn cut in half.

And here we have the final assemblage in all of its glory! Dinnerware for the biggest of wolverine fans, or people who just want a challenge!

 

Up next: The Scream

To start, I cut off my 3D scan for every part below my shoulders, then deleted some choice parts of my wrists to make the next few steps easier. I then imported a large oval and positioned it with an end just touching the neck to act as my body. From there I used a combination of the draw and drag tool to move around the body into a shape more closely resembling the art piece I was trying to capture, and to make arms that would reach to my wrists.

From there I imported some spheres onto the wrists, then use the shrink smooth and drag tools to create cuffs for my shirt.

The Scream, 1893 by Edvard Munch

Here is the final product in comparison to the piece I was trying to capture. A big issue I had initially was the fact that Meshmixer doesn’t have any subtractive tools, they all either slightly change the current surface or add on top of it. Fortunately the drag tool was able to do an okay job of subtracting from the model. I overall had more trouble using Meshmixer than TinkerCAD, but after I learned the ropes I found the process of using it to overall be more fun, since it was more like I was sculpting, rather than using a precise tool.

 

Finally: My 3D printed part for iRobotics

For some background, the robot I work on in iRobotics is similar to the ones seen in the T.V. show Battle Bots. In general I work with the electronics, in particular the motors and speed controllers for our robot. For our robot this year we decided to use outrunner motors for our drive system, and the weird thing about them is that instead of spinning just the central shaft like a typical motor, they spin the rear part of the outer shell. However, this causes us to run into a few problems from an electronics stand point, since that means we now have a spinning piece on the outside of our motors that other electronics can’t touch without risk of getting caught on it. Fortunately we have an in-house 3D printer at our work space, so I was able to print there.

Here are the initial measurements and CAD designs I had for the walls. A fairly simple design that would slide into place and block off access for most wires, whilst leaving space for us to power the motors.

However, when I talked to my team leader, Tor, he said I had left out a few things in my design. Firstly, we had a corner piece I had been intending on attaching afterwards, but he suggested I instead have a separate file with the two pieces attached and to soften the edge by using a fillet. In addition I hadn’t included a way to fasten the piece to the robot, and he suggested I add some drill holes near the base. Finally, he thought it would be a bit risky to have that much open space near the tops, and asked that I minimize them and round the corners. 

After I redesigned the pieces, I passed it by Tor again to make sure it looked good, and then asked the manager for the 3D printer, Eric, if the part would be food in the printer. He gave me the thumbs up and I went on ahead to the printing process.

Here is the machine in our work space as it prints out the first piece.

Here is the second piece all 3D printed. I didn’t get a picture of the other piece because it had disappeared into the depths of the parts bin, and it was late enough that I decided retrieving it would be an adventure for another day. We did some test fitting and it appears to fit well, but we couldn’t install it yet because we’re currently painting the frame, so we can’t assemble it all together.

 

Overall I was satisfied with the results of my work, but I can’t 100% test the results until Thursday, so I won’t know for sure if it’s up to snuff. I am relatively comfortable with SolidWorks, so I didn’t have a hard time at all using it. TinkerCAD reminds too much of SolidWorks, but without all the nice features to make me comfortable. MeshMixer was completely unique in my 3D modelling experience so far, and I’ll reiterate that it felt a lot more like sculpting than like a rigid tool, and I liked that a lot. It was a fun experience, although learning the ropes or dealing with suboptimal tools was a bit frustrating at times.

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3D Printing a Pi Zero Case

3D Printing

We learned about 3D printing for two weeks, and using various software, and scanners that could be used to create printable 3D designs

Part 1

First, we learned about Tinkercad, which is a very simple 3D modeling software. A huge benefit to Tinkercad is the fact that it’s accessible online, and even works in mobile devices. We created aliens and castles as an introduction to Tinkercad. Thanks to some preexisting models, they were not difficult to create. The next step was downloading the models as stl files, and playing around with them in Meshmixer. With Meshmixer, it was possible to smooth any quirks in the model that would make it hard to print.

Part 2

In the second week, we learned about 3D scanning. We used the Structure Sensor on iPads to scan some objects, but sadly, the scanned model did not come through by email. We also used the kinect scanner to scan people, and it worked quite well. The model created from the kinect was also unsuitable for printing, so we learned how to use meshmixer to make it better for 3D printers.

Assignment

I choose to design a themed utensils for my enemies, and a traditional art, and print out a case for my raspberry pi zero.

The theme for my utensils was the fact that they all had ridiculously round bottoms, so you could never put them down at all. It was quite simple to make with Tinkercad

The traditional art I chose was actually an instrument from Korea. I am in a student organization that gives performances using the instrument, and I thought making a 3D model would be interesting, and challenging, as the shape was quite complex. I was not able to get anything scanned into the model, however, as SketchUp was not friendly with importing stl files. However, I did create everything from scratch, and getting all the straps was quite a challenge. The changes I made were the engravings on the leather straps holders, and adding the university logo to the drum faces. 

The part that I actually 3D printed was a case for my raspberry pi zero. I already did have a case for it, but it left the soldering pin holes exposed. As I felt that I would not be soldering anything on my pi zero for some time, I  decided to make a new case that would cover the holes. I used SketchUp, as I had previous experience with the software. I used my old case as reference, and a diagram detailing the dimensions of the pi zero that I found online. 

Once the design was done, I tried to get it printed using the abs print at the fab lab. Sadly, it did not work out great. So, I used the PLA printer instead, which didn’t work out too great either. It did print, but the 4 holes in the corners were too small. I printed another set at the business maker lab, which turned out nicely. It’s holes were also slightly small, but I could make the hole bigger using a file.

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3D Print Assignment

For the 3d print scanning assignment, we used TinkerCAD to create an alien by playing around with the tools and features in the program and then transferring the file to MeshMixer where we played around with the tools and features there like the sculpting tool.

In the second lab, we used iSense scanners and the XBOX connect to scan objects and ourselves. Then, we took those files and played around with the scan on MeshMixer in order to become more familiar with the program and its capabilities like inspector, where we were able to identify and fill the holes that our scans picked up.

For the final assignment, I chose the prompt that aimed to create a 3d print of a famous painting. I chose René Magritte’s “The Treachery of Images” (1929) painting. It is a pretty straight-forward painting with a large pipe at the forefront and a cursive styled font with the French words: “ceci n’est pas une pipe” centered under the pipe, which translates to “this is not a pipe.” The oil on canvas emphasizes the gap between language and meaning. The painting itself is not a pipe, it is only a representation of a pipe. Magritte explained it best himself: “The famous pipe. How people reproached me for it! And yet, could you stuff my pipe? No, it’s just a representation, is it not? So if I had written on my picture ‘This is a pipe’, I’d have been lying!”

First, I created a platform as the background of the painting on TinkerCAD and found a similar style font on the program. This was fairly easy. The next step was to get my hands on a pipe in order to scan the object for the assignment. I went out and bought a costume prop pipe at a costume store. It wasn’t exactly shaped as the pipe in the painting, but it closely resembled it. As long as you could tell it was a pipe, I was happy. 

The base.

Isn’t she cute?

After, I was able to scan the pipe with the iSense scanners. This was a bit difficult because the pipe could only lie down horizontally and the scan ended up picking up the entire stool. Luckily, I figured out how to quickly get rid of parts of the scan I didn’t need on MeshMixer. Then I ran into another issue. There were a few holes in my scan. The auto fill didn’t really suffice to keep the shape of the pipe so I mirrored the image. Although the base of the pipe looked great, the tail of the pipe completely disappeared. Luckily, I remembered the sculpt tool and was able to draw the tail.

An unsatisfying auto fill.

Mirroring the object.

The tail disappeared.

Then, came another problem. I the hole in the base of the pipe was pretty bad. I couldn’t find a tool in MeshMixer to hollow/refine the hole or a feature that might be able to invert a cylinder to create a hole. I asked a Fablab member for help and they suggested using the program Fusion 360. This was really difficult to navigate because I had no familiarity with the program and a lot of the tools and features used language that I was not familiar with. With the help of the Fablab members I was able to place a cylinder and create a hole through the shape at the center of the base of the pipe to make a really clean hole.

A pipe of many faces.

While on Fusion 360, I was trying to find a tool that could similarly sculpt in MeshMixer in order to clean up the edges of the cylinder, but couldn’t find anything so I switched back to MeshMixer to do so. Then I had to export the platform of the painting from TinkerCAD to Fusion 360 in order to combine the two objects because TinkerCAD was having issues importing STL and OBJ files. Finally, I was able to combine the finished pipe onto the platform on Fusion 360 and after five hours I had finished my assignment design!

The next day I came into the Fablab to print the design. The print job took nearly three hours and although the design isn’t as complex as I initially wanted it to be, I feel pretty accomplished and satisfied with how it came out. If I could improve the end product, I think I would want to create two separate prints, that of the platform and that of the pipe so that it could be removed from the platform! I really enjoy the process of 3D printing, it was a bit intimidating at first, but since I’ve gotten through it, I feel more comfortable with it.

The end result!

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3D Printing Assignment: Charlie Spring

For 2 weeks we learned about 3D printing and a variety of software andtools for creating models in 3D. I had no background using the software, so it was difficult for me and I spent a lot of time trying to learn Fusion 360 for my final project. I could definitely use another week or so working on it to perfect my craft.

Here is my Final Product in Use:

Lots of technology going on here. You can see my charging station on top of the speaker, dual monitors, headphone stand, lighting set up, Alexa Dot, and headphone stand that make my workspace productive.

Read more about my final work at the bottom of this post!

 

Preliminary work:

 

I created a castle with stairs that will allow an intruder to drop into a deadly pit. This was for fun and to become more familiar with the software.

I patched the hole that was above my head using software

Here is the front scan. I believe this was done with the Xbox Kinect.

Remixed Art Project:

This was a fun project I made in class with Meshmixer. I took a famous painting of “A landscape with the Grim Reaper” by Filippo Napoletano and created my own version by messing around with Mesh mixer. My inspiration was mainly from the Grim Reaper its self, but this painting reminded me of my hideous creating, so it was a piece of why I created it. 

Can you see the resemblance between the two? Not my best work, but I learned a lot about the program.

Final Product: 

In my final piece, I created a headphone stand for Beats Solo Wireless headphones. As an audiophile and technology lover, I have a desk setup that includes multiple monitors, speakers, lighting, charging ports, and various other unnecessary but useful items. I normally would hang the handphones over my monitor when I didn’t use it, but that got in my way a lot of the time meaning I wanted to find a better solution.

Using Fusion 360, I went through a lot of trouble to get my model to print (kind of) correctly. Shout out to James for helping me learn about Fusion 360. I will talk about how he helped me later in my post.

After I picked up my model from the lab, one side of the top part of the headphone stand had printed incorrectly, so I snapped it off and cleared some of the material away from the break point. Using a torch, I slowly heated the material and connected it together as best I could. There were some uneven parts after I connected the pieces, so I used the torch as well as a knife to smoothen out the model. Even without super glue, it looks like it printed correctly now.

You can see that I fixed the broken portion of the print and the cord charges the headphones.

Design Planning: 

I knew that I wanted to create a simple model of a headphone stand to support my headphones while also keeping the mess of wires away from my desk. I designed the stand to have a 90 degree “pipe” that allows you to thread a micro USB cord through so you can charge your headphones without tipping them over. I didn’t think about the idea of the model tipping over before creating it, but now that I tested it, I can see that it wouldn’t have worked if the cord wasn’t threaded from the pipe. 

Here is a preview of some of the work I did before asking for help:

This was my first part where I created a stand and pole, but I was struggling to get the top part to sit on the pole.

I made some progress on the stand, but I realized that I needed help because I couldn’t figure out how to cut the holes out correctly.

I reached out to James and he told me to restart my model because I needed separate bodies so I could work with the independently. He helped me immensely because without that, I would have been tinkering for hours. I was able to cut the hole correctly, and at home, I measured and tested the model based on stress and other cool features of Fusion 360. After that, I got to the Fab Lab on Sunday and let my model print for about 8 hours!

Reflection:

In the end, I’m really happy with my final product. When I cam into the Fab Lab on Monday night to see my broken piece, I was really upset and didn’t even take a picture of it. After that, I took some time to settle down and decided to play around with the model again. By breaking the piece off and using heat, I fixed it! That made me feel awesome because It looks like one piece.

Next time, I would work on Fusion 360 more so I could have a better understanding of how to use the tool. Also, I would have drawn more sketches and story boards because they have been helpful in my past design processes. As a challenging project, this made me more fluent with different forms of technology, more patient because 3D printing is frustrating, and more curious about how I can use these tools to make other cool things. 

I hope you enjoyed my post and final project. If you have any questions, please reach out!

 

 

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Assignment 4

For this assignment we learned a bit of 3D modeling and the basics of 3D scanning and printing. We used various software such as Tinkercad and Meshmixer. There were other options like Fusion that appeared to be more advanced but I did not end up using them. As an introduction, I made a robot using Tinkercad built-ins and used Meshmixer to sculpt some of the parts. Although it was simple, I learned how to scale the size and position of objects, rotate them, create holes, and also use sculpting tools in Meshmixer such as smoothing.

We also used 3D scanners, using two different tools. Here is the output of one of them. It was somewhat detailed, but the top of my hair was cut off so I used some of the smoothing tools to make it look more normal.

For the final design, my original plan was to incorporate a model of myself (replacing the dog) into a painting (A Friend In Need by Cassius Marcellus Coolidge).

I initially designed a chair and the table using Tinkercad. But I realized that since I didn’t have a full body scan of myself I decided against it. I also felt that the background (e.g. the walls, the painting on the wall, and the ceiling light) was an important part of the painting and I wouldn’t be able to replicate those easily.

I ended up choosing to design a custom set of dining utensils. My idea is to have a set of sideways-oriented utensils that makes it difficult to eat. I originally designed normal looking silverware and then rotated the positions of the non-handle end. The handles were created with ellipsoids, and the fork was created with several rectangular prisms and triangular prisms. The spoon was created with half of an ellipsoid, and then cutting a hole in it by creating a smaller one slightly above it. The knife edge was drawn.

I exported the three pieces (the sideways spoon, fork, and knife) into Meshmixer. I did a bit of blending on the bottom sides of the pieces to make it look slightly less awkward.

I went to the BIF makerlab to print my utensils but there was a three hour wait so I took a bus to the Urbana Free Library and did my prints there.

After peeling off the supports this was my result. Although I have not tried it, I would personally choose to not eat my dinner with these.

Overall I am satisfied with the result and have definitely learned a lot about 3D modeling in the process. If I were to repeat the process I would probably print my utensils a little bigger and maybe add more structure to the connecting points to make sure it’s even sturdier (I did not break it when peeling off the supports but I was a little anxious about the possibility.).

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3D Printing and Scanning Assignment

Design Process

For the design of this assignment, I sought to design and print a guitar strap lock for my acoustic guitar. The reason I wanted to design this was because my previous guitar broke because the guitar strap slipped off very abruptly when I was trying to adjust it’s fit around my neck. As a result, I needed an additional precaution for making sure that this mishap would not happen again. For the design, I measured the rough diameter of the strap peg on my guitar and used that accordingly for the center hole of the lock. To account for it possibly being a tight fit, I added a couple notches so that there would be a greater flexibility to the lock as I would try to slide it on. I did this by drawing a larger construction circle and then cutting it up with lines. I then drafted 2 splines to further curve the edges. Below is my completed design for the strap lock.

My completed design for the guitar strap lock created in PTC Creo Parametric.

Build Process

For the build, the settings I had were 0.3 mm layer height and 20% infill when printing it using Cura 3.2. I used Brim for the print to hold down the edges. Below is how the strap lock appeared in Cura.

This is the print screen for the finalized strap lock in Cura 3.2.

The print for the strap lock took 31 minutes. Below are some of the pictures in the middle of the print process.

Picture of the printing of the guitar strap lock in the middle of the print.

Nearing the end of the print.

Final Product Reflection

Because there are 2 strap pegs on a guitar, I actually ended up printing out 2 strap locks! Below is a picture of the before and after of the strap lock after peeling off the brim.

The bottom print is the strap lock with the brim. The top print has had the brim peeled off.

I’m very content with the final product! I was a little worried at first that it wouldn’t fit on the strap peg, but it just needed a strong push and it did its job well! Below is a picture of the lock in use.

The strap lock fits very nicely over the strap and on the peg!

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Assignment 4: 3D Printing & Scanning

Part 1

In order to learn the tools and software used in 3D printing we started off making models in TinkerCad. I made a castle and a character to go in the castle:

We then imported the character model into MeshMixer in order to learn how to sculpt and modify .stl files:

(I added tentacles and a camel head to my model and then applied a blocky filter, unfortunately there was an error with the boolean union so there are some weird lines)

We then were introduced to two scanning techniques and used MeshMixer to fix errors.

This bust was made using a handheld scanner attached to an iPad

Part 2

For the second part of this assignment we were instructed to follow one of several prompts in order to design and print some model(s). The prompt I chose involved modeling plate ware with a twist. I chose to make plate ware for my enemy. Because I already had experience in it I used Fusion 360 in order to design my models. I created a plate with holes in it:

A knife that you had to hold in the middle:

And a fork that had chains for a handle:

For printing these models I used the MakerLab for the plate and knife and the FabLab for the fork. The plate and knife both printed successfully the first time:

The fork however failed the first time and required modifications to the support in order to print correctly:

After I finished printing all three models I needed to remove the brim and support material. The material from the knife came off easily, however the fork and plate were a different story. The fork was a very fragile model and I ended up breaking off the last chain in handle:

While removing the brims from the plate model I ended up slicing my finger slightly but the print came out alright. The finished models can be seen below:

Reflection:

I have a couple of 3D printers at home and I have used design tools extensively in the past but I still did learn some things from this assignment. This was the first time I designed a model with chains in it. Removing supports from this model was quite difficult and I think if I were to do it again I would make modifications to the model to make printing it easy. I also got to use 3D scanners for the first time and learned the limitations of them. Finally I learned to be careful when removing brim material with knives.

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