Mechanical Artillery Cannon gun moving turret

Take a look on my latest model: Model Link: https://makerworld.com/en/models/3204805-working-mechanical-excavator

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Update (04-Nov 2025): (lift screw and gear splitter) Based on user feedback, I’ve adjusted a few parts that were reported as too tight in the comments. The updated version has slightly smaller and looser fits, so all parts should now assemble more smoothly without forcing.

Trigger and striker Make sure remove all support layers from trigger and striker to work good. Some users mentioned the power shell trigger was either sticking out or too sensitive, so I’ve added one new trigger versions — and one little long striker for smaller springs . Re-download for the best fit.

For spring : The original model used an EasyMech 7.4 × 5.4 × 20 mm spring, which some users mentioned isn’t available globally. You can now use any of these common alternative spring sizes instead or you can cut long spring— they all work perfectly:

Spring max outer diameter (OD) 7.4

Please Rate the model in Bambu Studio after printing — it means a lot to me and helps me create even better designs.

Assembly video : https://www.youtube.com/watch?v=oDCbh4iHs9w (animation) https://www.youtube.com/watch?v=twX6pfhzges&t=12s (printed parts)

If you face any difficulty printing or assembling the model please leave a comment. And if it works for you after printing and you like it then please leave a subscribe. (Only if you like the model)

Meet the Artillery-Style Mechanical Toy —a hand-powered, table-friendly motion model that feels alive. Rotate right handle to move turret left–right, rotate left handle to aim up–down, then use the firing handle to launch a light demo projectile. The best part? A visible recoil mechanism inside the turret snaps back after each shot, so you can see energy storage and release in action.

How it works (the fun bits)

- Traverse (left–right): A simple hand gear drives the turret ring for smooth pointing.

- Elevation (up–down): A compact linkage lifts the barrel module with a steady feel.

- Shot + Recoil: A spring stores energy for a gentle, low-energy launch. On release, a recoil slide moves back and a return band brings the system home—making the physics obvious and satisfying.

You will need (hardware)

- M2.5 screws: M2.5×5 (1 Piece) Used in barrel's gate (opener) Make sure screw after tightening should be level with barrel door's inside surface.

- Rubber band: medium-light tension (loose rubber band makes more recoil) To connect barrel with canon holder so recoil can happen

- Compression spring: , OD-7.4 and ID-5.4 , length ~18-20 mm. (Don't use extra-strong springs. High force can snap plastic parts and cause injury.) Used in power shell.

Please rate the model in Bambu Studio after printing — it means a lot to me and helps me create even better designs.

For the shells: • Single-line shells: 0.20 mm layer height, 4 walls, 15–20% infill, PLA recommended. These are lighter and designed for longer-distance firing. • Double-line shells: 0.20 mm layer height, 8 walls, 15–20% infill, PLA recommended. These are heavier and designed for shorter-range shots, with more stability and impact. The shell weight does affect the firing range, which is why I made these two versions.

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Safety & Liability Disclaimer

This 3D-printed launcher is for display / education only. It can cause injury. Always wear eye protection, never aim at people/animals, and follow local laws. By downloading/using this you accept all risk — I am not responsible for any injury, damage, misuse, or illegal use.

Watch the demo video to see the real 3D-printed cannon in action It moves left/right, up/down, and fires projectiles. https://www.youtube.com/watch?v=twX6pfhzges

Other models :

https://makerworld.com/en/models/2235748-desk-cleaner-mechanical-loader

https://makerworld.com/en/models/2418848-magical-orbiting-spintop-gravity-effect

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