Introduction: K'nex Ball Machine Lift Instructions: Full Automatical Giant Ball Catapult
This is my new lift, the Giant K'nex Ball Catapult, in my room it shot 4 meters away (because my room is too small), but I think it can about 10 meters away maybe, it only countains a motor, it's fully automatic, the arm is tracted by a nylon cable, but the shot is very hard to regulate, because the catapult shot creates a role-back, and the elastics extend.
I've build a second version, it's economize pieces, and I've done some improvement.
And now, let's get started !
Step 1: Part List and Caution
Before starting to build the catapult please read it atentivly:
WARNING! The nylon cable can cut very badly when the catapult is shooting! (it can cut plastic !)
In case of accident I decline any responsibility !
PART LIST:(for the basket version with the lift)
-blue 3d connectors: 151
-purple 3d connectors: 242
-light grey: 12
-dark grey: 72
-medium yellow gear: 3
-medium red gear: 7
-small blue gear: 3
-lock clips: 20
-pink straight rod: 5
-grey spacers: 51
-blue spacers: 56
-green motor: 1
-red double compartment motor: 1
-Y clips: 15
-nylon cable (10 kg chargeable) : 1 meters (3 feets)
-chain link: 65
-black hinge connector: 2
-blue hinge connector: 2
-cushion (35 on 35 cm): 1
-big brown scotch: 1
-rubber bands (120 on 1,8mm): 13
-rubber bands (60 on 1mm): 2
Step 2: Frame of the Catapult (part 1)
Step 3: Frame of the Catapult (part 2)
Step 4: Assemble the Two Parts of the Frame
Step 5: The Rearming Mechanism (part 1)
Step 6: The Rearming Mechanism (part 2)
Step 7: The Rerming Mechanism (part 3)
In this step you will need a teflon roll.
Step 8: The Rearming Mechanism (part 4)
Step 9: The Firing Mechanism (part 1)
build the first part of the firing mechanism
Step 10: The Firing Mechanism (part 2)
Step 11: The Catapult Arm
build the arm of the catapult.
attach the catapult arm.
place the nylon cable.
adjuste the nylon cable.
Step 12: Placing the Elastics
Place the double-elastics.
And equilibrate them.
Step 13: The Anti-tangle System (optional)
This is an optional step.
But it can be useful.
Step 14: The Ball Dispenser Tower
Step 15: The Ball Dispenser (part 1)
Step 16: The Ball Dispenser (part 2)
Step 17: The Ball Dispenser (part 3)
Step 18: Assemble the Ball Dispenser Tower With the Catapult
Step 19: The Tower of the Basket
Step 20: The Basket (part 1)
Build the first part of the basket.
Step 21: The Basket (part 2)
Build the second part of the basket.
Step 22: The Basket (part 3)
Build the third part of the basket.
Step 23: The Basket (part 4)
Build the final part of the basket.
Step 24: Place the Catapult and the Basket Tower
Place the basket tower.
Place and attach with scotch strip the catapult.
Step 25: Well Done !
So, it's finally finished !
feel free to ask for help in the comment section :-)
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