Printed assembled catapult without support

cults3d

I propose you start the year with a playful challenge, building a small catapult. This ABS printed device can launch a 2-cent piece between 4 and 5 meters, giving you enough power to assault a Lego castle or challenge colleagues at work to hit a goblet during coffee breaks. To make this project a success, I recommend using ABS due to its resistance to torsion and ability to retain a good spring effect. PLA, on the other hand, is less flexible and more fragile, making it less suitable for this type of use. I have tested ABS from different origins without any issues, except for a small variation in propulsion power. To ensure adhesion to the print bed during printing, maintain the tray between 100 ° and 110 °, especially if you're using ventilation to speed up part solidification. This is crucial for parts with small cross sections. A good temperature of the deposited material is essential for cohesive layer formation and strong assembly resistance. The performance of your print head plays a significant role in this operation. For optimal results, choose an internal filling from the inside out, which maintains cantilever areas better, even if it slightly degrades external surface quality due to amplified defects from previous layers. My example uses a 40% fill rate (higher density increases power but also printing time and material consumption). I selected a crossed linear internal structure for its ability to resist torsion in certain parts. Total printing time: 1h37 Check out this video: https://youtu.be/671NCBFebXE For more information, visit: https://www.genapart.com/2017/01/02/catapult-printed-assembly-sans-support/