High Voltage Funwheel & Hypercube 3D Printer Build -o- Planning Stage

JoeyZ5 · April 16, 2021, 2:38pm

This is kind of a unexpected project… I always wanted to build a Onewheel but never wanted to deal with shipping from overseas. Until recently when I saw a killer deal on the Funwheel discord.

For $225, I got the hub, rails, and all the hardware to build the board, plus a bunch of electrical bits. It was amazing and I knew I had to snatch it before it was gone.

Now you are probably wondering, what’s with the 3D printer in the title? Well the problem is the footpads and electronics boxes for the Funwheel are too big for my current i3 printer. Also it’s like 6 years old at this point and is getting quite worn out.

So I need a new printer and I could just go out and buy one, but what’s the fun in that? I’ve built a hypercube before and I really liked it so I’m set on making another one. I want to go all out… no cheap parts… I’m done with stuff breaking for no reason.

So here’s my general build plan:

235x235x250mm build volume
Full black 2020 V rail frame
PETG printed parts
8mm hardened steel linear rods for y and z
10mm carbon fiber tubes for x axis (weight savings)
Dual z motor axis with integrated lead screws
24V 15A Meanwell PSU
Upgraded mainboard from my old printer, it has TMC2208 silent stepper drivers
E3D Hemera direct drive hot end
Ender 3 heated bed with glass plate
BL Touch
Octoprint
Probably more that I can’t remember

For the Funwheel, I’m not super sure yet but this is what I would like:

18s2p P42A, bypassed - DALY BMS from Duck
Little Focer or ZESC Raiden 7(16s)
ESP32 running rESCue for feedback and logs
WS2811B 144 LED/m for cool headlight/tail - underglow?
Also more that I probably can’t remember

Basically I don’t want to spend more than a pint, but I want it to beat an XR

I will have an update when I get home from school today

Minimadness · April 16, 2021, 2:58pm

The Raiden can do 18s too if you want it to. Or are you staying 2S under each of their limits for safety/headroom?

JoeyZ5 · April 16, 2021, 3:01pm

Well when I asked they said the hardware limit Is 80V, and 75.6V is quite close…

I would go 20s but the BMS is massive and it just seems like a bit too much voltage

Lionpuncher · April 16, 2021, 3:08pm

Have you checked out the voron printers? They look amazing! Have my eyes on building one of those in the near future.

JoeyZ5 · April 16, 2021, 3:19pm

I’ve seen them but they look intimidating

Maybe they aren’t so bad

Minimadness · April 16, 2021, 3:24pm

Intimidating at first, but the community is pretty big. And the documentation is great. There is kits on aliexpress and you can get someone from the print it forward program to print you a set of printed parts if your current printer can’t. Will cost you a lot more money though, easily over 1k for a 300^3 printer. I’m slowly printing and collecting parts for a 350^3 one.

JoeyZ5 · April 16, 2021, 3:25pm

That’s the big thing, the conversion I have planned in a spreadsheet will only cost ~$500 and work pretty well.

Lionpuncher · April 16, 2021, 3:51pm

A bit perhaps, but they’re gaining in popularity, therefore starting to become more and more accessible with kits and building info. I love the idea of a big build plate on a core xy system. Suuuuppeeerr fast compared to Cartesian.