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HOT ROD - project
What do you get by building this model?
- Construction of basic driving mechanisms.
- Influence of tires on driving quality.
- Electronics connection logic.
- How RC models work.
- Light, for night rides.
- The sound it emits depending on the speed.
- Driving, sprinting or drift.
- Model construction.
I started the project almost 2 years ago when I worked part-time at Prusa Research. I was working on the development of an SLA 3D printer - PRUSA SL1.
I was motivated to create my own project and after some time of searching for what I would enjoy, I found that RC models are relatively easy and fun to both produce and assemble.
I was and still am a student, so I wanted the model to be as cheap as possible, so I ordered all the components that had to be bought via ebay (you can find a list of components at the end of the article). At a local hobby dealer, the hardware for the model would cost me many times more. All plastics are printed on a 3D printer, so they were also cheap (the price estimate for plastics is around 25 USD).
After a year of modeling in CAD, I produced the first prototype, but it had significant defects. After a year of tuning, dozens of improvements and changes, I can proudly present my project as finished. I would like to introduce him to you now.
I would also like to say that I created the whole project while studying about free time and over the holidays. I shot all the videos you see on my mobile phone with the help of my younger brother.
The maximum measured speed with anti-slip tires is over 34 km / h, you must not forget that this is a 3D printed model. Some parts are more prone to breakage. For example, driven shafts on the rear wheels. Sometimes it happens that too much transmission torque cuts them. Fortunately, you can print a new one and move on.
After a lot of tests, I found that a material called FLEX 98A must be used on the shafts that are located inside the wheels. It is flexible, but the bolt is stiff enough to withstand a large torque without bursting. It will be necessary to print 4 shafts, but printing is quite difficult, so I enclose instructions that should help with printing: https://blog.prusaprinters.org/en/how-print-with-flexible-filament_32329/
You can see orange, black and gray parts on the car. Orange and black are made of PETG (greater flexibility worse strength), gray of PLA (hard, brittle). Except for 4 shafts in wheels which are black, but from the above FLEX 98A.
If you have no equipment and you have to buy everything, it will cost you around 194 USD, or 133 USD without the sound system, tires and screws. (Plastics are not included in the cost)
For this project you will need
- 3D printer at least 200x250x200 (Prusa MK3)
- 1 Kg of material (PLA, PETG and a little of FLEX 98A)
- 91 hours of print time
- 30-40 minutes to assemble
- all hardware parts from ebay or other source
- screw driver with hex bits
- some adhesive for assembling the body (two big parts)
Rubber tires - sprint/grip
Tires were bought on ebay
+ grip, handling, acceleration, speed
- higher gearbox wear, greater chance of failure of some of the shafts
FLEX 98A tires - drift/slip
Tires were 3D printed with material FLEX 98A
+ drifts, lower gearbox wear, components wear minimally
- harder handling, lower acceleration, lower speed
3D printing of embossed photos
Printing photos by Lithophane method. Email the photo to print, we'll send you a preview, and after approval, we'll make the photo.
Create a design with a prototype
Combining the two previous services, designing and then printing the design using 3D printing.
What are the limits of 3D printing?
- Tolerance for deviation: 0.2 mm
- Minimum hole diameter: 1 mm
- Minimum wall thickness: 1 mm
- Maximum part size: 210x250x200 mm
Possible consultations before the start of prototype creation or during the creation.
At the email address email@example.com
Phone +420 605 190 282