Joined: 17 Jan 2011
Posts: 305
Location: Dandenong North Victoria
Motorizing a Skateboard
Hey again. This isnt quite Robot Related but i got bored walking a straight concrete road to school everyday. So im considering motorizing my skateboard haha.
First off I am moving this to off topic. Secondly this is illegal in Australia (wouldn't stop me doing it but just so you know when you get pulled over by the cops).
For the motor look on hobbyking and find something with about 3kW+ output then search for something similar with free postage on ebay it will usually be cheaper. You can also usually get combo ESC + motos too.
I am not 100% but anything other than a bicylce is illegal in QLD and pretty sure in all other states. NSW/VIC you can do petrol ones but not in QLD. I know the limit for bikes is 200W which is a bit different to 4kW but if you are trying to claim that its a bike I would suggest sticking a 200W sticker on the motor for shits. No one else will know.
My advice, look for the biggest, heaviest, lowest Kv brushless motor on hobbyking, then look for the biggest ESC to go with it, then go with the biggest amount of LiPol's you can afford to power it all. Budget $500+
If your on a complete tight assed budget, you will find a pair of 100w scooter motors will be sufficient to push a 80kg person along at 15kmh all day, every day. Grab a BotBitz 85A, throw on a few 6S LiPols with good capacity (5000mAh - 12000mAh) and low C discharge (cheaper) and you'll probably be able to do it for <$200 _________________ https://www.halfdonethings.com/
Fri May 17, 2013 8:06 pm
Vignesh
Joined: 17 Jan 2011
Posts: 305
Location: Dandenong North Victoria
Hmm. Alright. I cant go for the scooter motor although it is easier to do. It needs to be able to fit in my locker.
I would say my absolute budget would be $300 (Aka. 3 months work or alot of begging to my parents haha)
Its gonna be controlled by a cheap 2ch pistol radio. _________________ Viggy!
1st Robot in progress!
I would say my absolute budget would be $300 (Aka. 3 months work or alot of begging to my parents haha)
Its gonna be controlled by a cheap 2ch pistol radio.
Adding 2Kw+ to the "original 9.2 Kw" will make a difference when needed.
Sat May 18, 2013 4:26 pm
Jaemus Experienced Roboteer
Joined: 01 Apr 2009
Posts: 2674
Location: NSW
^ haha i was pondering the same thing for my useless Yamaha R15 _________________ <Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls
Sat May 18, 2013 6:18 pm
Vignesh
Joined: 17 Jan 2011
Posts: 305
Location: Dandenong North Victoria
Alright. I shall use the 270KV motor with the TZ85A and 2 B-Grade 5000mAh 6S 25C LiPo.
Ill need some help here.
I need to somehow connect the motor to the trucks itself. I had a LONG look at how the LaGrange L1 works and assembles: http://www.redrockboardshop.com/gallery
Allows for some gearing which allows flexibility for top speed, acceleration and hill climbing ability. _________________ https://www.halfdonethings.com/
Sat May 18, 2013 9:51 pm
Vignesh
Joined: 17 Jan 2011
Posts: 305
Location: Dandenong North Victoria
Aha yes. Thats the LaGrange L1 that i was looking at. Id have to make it from scratch from the baseplate up.
Ill take apart a couple of spare trucks i have lying around for my skateboards and see how i can modify it without too much work.
The 270KV motor running at full power on the batteries (22.2v) with a 2:1 drive system should give me a theoretical top speed of 42km/h but in realistically would be around 25-30 km/h taking into account weight and ground type i think. _________________ Viggy!
1st Robot in progress!
Sat May 18, 2013 9:57 pm
Vignesh
Joined: 17 Jan 2011
Posts: 305
Location: Dandenong North Victoria
Found the metroboard on youtube and had a look at how they did it.
They took the same approach as i was going to.
https://www.youtube.com/watch?v=DMYhUHeX5Fg
The only thing is the skate wheel they used had its own timing pulley embedded in it.
How would i go about connecting one of these
with the skate wheel?
The total cost of all the stuff needed - Motor, ESC, Batteries, 30T and 15T timing pulley with 60T belt + charger all up costs $200 _________________ Viggy!
1st Robot in progress!
Sun May 19, 2013 6:17 pm
Vignesh
Joined: 17 Jan 2011
Posts: 305
Location: Dandenong North Victoria
Any ideas guys? _________________ Viggy!
1st Robot in progress!
Wed May 22, 2013 7:28 pm
Knightrous Site Admin
Joined: 15 Jun 2004
Posts: 8511
Location: NSW
Come on, we can't spoon feed you everything
Do some thinking, maybe get out and try to build something yourself
If it works, it works, if it fails, you've learnt something. _________________ https://www.halfdonethings.com/
Wed May 22, 2013 10:13 pm
Glen Experienced Roboteer
Joined: 16 Jun 2004
Posts: 9481
Location: Where you least expect
Give him a break, he's doin his best to put together a plan
Making a skateboard drive would be easy as anything, getting it to work with the truck setup so you can actually steer it is a bit of a pain in the butt.
Driving both the wheels would mean remaking part of the truck which is a tricky piece. I don't think it could be done well without a welder + lathe.
Though some EV boards only drive one wheel and use a standard type truck. Maybe you could look into bolting a little timing pulley or sprocket set onto one of the wheels itself and then just weld a mount on the truck for your motor. That'd probably be easiest. _________________ www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz
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