Tackling some open questions at smaller scale.

Table of Contents

Gears

Rear wheel drive, differential gears

• Would like to learn more about gears, so going to try using a gear system instead of 4 separate motors
• 3D printable differential gear: https://www.thingiverse.com/thing:737465

https://twitter.com/jorisroovers/status/1303385364833460225

<aside> ⚙ Decision (2020-11): Will go with a belt/chain drive system and not a differential gear. While cool, they seem to be uncommon on go carts and so hard and expensive to purchase. Some folks have build their own from separate gears, but I think that's probably beyond my current skill-level and a rabbit hole I don't want to get into at this time. I can always revisit this later.

</aside>

Battery

• Based of power tool battery

• Got this to work, surprisingly easy

  https://s3-us-west-2.amazonaws.com/secure.notion-static.com/dd095fc2-2503-4d56-b16d-d86c85555706/IMG_7726.mov

• TODO: add link to makita adapter thingy

  • Both 3D printable and bought version
  • https://nl.aliexpress.com/item/4000977611758.html?spm=a2g0s.9042311.0.0.27424c4dbAmyZN

Electric DC motor attached to tool battery

<aside> ⚙ Decision (2020-11): Will try to use 1 or 2 (in series) Makita 18V batteries for powering the kid car. I've been able to get

</aside>

Research Links

• https://hackaday.com/2020/03/30/designing-printed-adapters-for-power-tool-batteries/
• https://www.youtube.com/watch?v=pO1RqgAFP5Q

Motor

• Bought a 36V DC, 800W motor on eBay:
  • https://www.ebay.nl/itm/Buerstenmotor-Brush-Motor-36V-DC-800W-Steuergeraet-Pedal-Fuer-Gokart-Elektrofahrrad-/352953274800
  • Motor shaft diameter:
  • Motor shaft screw: M8, left-handed?
• Got it working on an 18V Makita battery + simple (90W max) speed controller

https://twitter.com/jorisroovers/status/1339963672148500481

• The motor was an entire kit and also came with a speed controller and computer, but I'm not using those as of 2020-12-27. This is something I'd like to look at in the future, potentially build my own speed controller.
  • Building your own speed controller: https://www.youtube.com/watch?v=GtXMHM78Xbo&list=WL&index=11

Rear axle