Knex Manual/Motor Gear Box
by mathsboy314 in Living > LEGO & K'NEX
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Knex Manual/Motor Gear Box
![RIMG0046.JPG](/proxy/?url=https://content.instructables.com/F3A/78F9/GWPDTA6Y/F3A78F9GWPDTA6Y.jpg&filename=RIMG0046.JPG)
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Welcome! Here are instructions to create gearbox that can easily be set to motorised or manual. It's hard to explain so here's a video:
http://www.youtube.com/watch?v=mEJXXfG4YsE
http://www.youtube.com/watch?v=mEJXXfG4YsE
The Base
![20200413_134656.jpg](/proxy/?url=https://content.instructables.com/FLA/S25Q/K8WIKEML/FLAS25QK8WIKEML.jpg&filename=20200413_134656.jpg)
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Yeah, everything else goes on here.
The Motor
![20200413_135248.jpg](/proxy/?url=https://content.instructables.com/FC4/RNKO/K8WIKEOE/FC4RNKOK8WIKEOE.jpg&filename=20200413_135248.jpg)
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This section is the motor.
A Bit of Support
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It's easier if this is just an extra step. If not the next step is too long.
The added pieces in this picture are: 1 green rod, 1 white rod, 1 blue rod, and 1 yellow connector.
Moving Gear
![20200413_135812.jpg](/proxy/?url=https://content.instructables.com/FFJ/DFQS/K8WIKES9/FFJDFQSK8WIKES9.jpg&filename=20200413_135812.jpg)
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This gear shifts forwards and backwards to mesh with either the motor's gear or the manual gear.
The Manual Gear
![20200413_140714.jpg](/proxy/?url=https://content.instructables.com/FKU/P4D3/K8WIKEU7/FKUP4D3K8WIKEU7.jpg&filename=20200413_140714.jpg)
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If the motor jams, switch to this.
The "output" Gear
![20200413_141447.jpg](/proxy/?url=https://content.instructables.com/F2G/ZJR0/K8WIKEW3/F2GZJR0K8WIKEW3.jpg&filename=20200413_141447.jpg)
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The rod is what to connect the turning part to. It could be any size.
How to Use (you're Done Anyway)
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With the motor facing towards you, if the trigger is left, turning is manual, if the trigger is right, then the turning is motorised.