Electric Longboard
I planned on converting my longboard to an electric longboard, so I could use it to get around campus faster. Sadly this project is on indefinite hold because I fell off my longboard too many times and medical bills are expensive.
Skills - Research, Design, Soldering, Electronics, CNC Milling, CAM, FDM Carbon Fiber 3D Printing
A lot of amps
The first thing I did after researching, selecting, and ordering all my parts was assemble a battery pack. I spot-welded the Molicel P26A LiPo cells together to form a 10S3P battery pack which is 36V and has a 75A current output. Finally, I soldered on a connector and battery management system to regulate charging.
Mounting the motor
The motor mounting system has 2 sections. This part is the section that clamps directly onto the longboard axle and provides 3 mounting holes for the other section to attach to. I machined this part from some scrap 6061 aluminum using a Tormach 1100 CNC.
Mounting the motor part 2
This section is the other half of the motor mount. The plate clamps onto the other section, and then the motor is screwed into the plate. This part was easier to CNC than the clamping section since it has simpler geometry and didn’t require tabs or soft jaws.
Trying carbon fiber infill
The motor transmits power to the wheels through a timing pulley that attaches to these wheel hubs. I decided to experiment and 3D print these on a Markforged printer so I could reinforce the nylon filament with carbon fiber. I added some reinforcement throughout the pulley section and around the mounting holes that would attach to the wheel itself.