Electrically-Powered Mountain Board

ShockSlayer · **Posted:** Fri Sep 24, 2010 7:52 am

Nice, but why did you have to get someone else to bend it for you? Don't you have super strength?

SS

βeta · **Posted:** Fri Sep 24, 2010 9:11 am

Yeah, a bench vice, some pliers, and a hammer would have done it.

βeta · **Posted:** Fri Sep 24, 2010 10:04 am

Also, I don't understand where the motor is going and what those brackets do. Assembly pic plox.

ShockSlayer · **Posted:** Fri Sep 24, 2010 11:43 am

I'm thinking Mario doesn't have a vice, that was why. I'm calling him a woman if he does.

samjc3 · **Posted:** Fri Sep 24, 2010 2:00 pm

βeta wrote:

You know what would be awesome? Wireless throttle control. Also, could you use the motor as anresistive brake by running it backwards?

Those are both bad ideas. Wireless throttle is stupid because of interference and the fact that batteries can die.
Running the motor backwards is stupid because he is using direct drive, so far as I know. You would want a flywheel to take the torque off the motor for that.

As for assembly, It looks to my like the motor mounts under the truck and spins the wheel via a belt. thats my guess.

Mario · **Joined:** Wed Jul 15, 2009 7:11 pm **Posts:** 1722

SS: Don't be silly, of course I have a vice.

It would have taken quite a while to do it myself, though, and I couldn't do it as well as a metal-bending machine. Besides, if they wouldn't have done it immediately and for free I wouldn't have had them do it. But I knew they'd feel bad for taking so long with my other order and do that right away.

Beta: Lucky you, I finished the motor mount just today.

I thought I would be able to finish the board this weekend, but I don't have the right chain. Now I need to buy more stuff.

Luckily, 10ft of #40 roller chain is $20 shipped on eBay, and it's in Long Beach, about 2 hours from here. The brake pad there will be replaced with the other sprocket.

brunoip · **Posted:** Fri Sep 24, 2010 6:36 pm

Looking great (tinypic is back in Argentina :lol:

)

regards, bruno

zeturi · **Posted:** Fri Sep 24, 2010 8:15 pm

I gotta say, Mario, that I love your work logs. Tons of great pics!

βeta · **Posted:** Fri Sep 24, 2010 8:27 pm

OIC. Sam, if there was a brake lever that could be foot activated, you could still stop with dead batteries. Not that it would really be a problem. Just charge when you're not using it.

Mario · **Joined:** Wed Jul 15, 2009 7:11 pm **Posts:** 1722

Thanks Zeturi! :awesome:

More pictures. Now, all I need to do is solder the batteries to the motor, solder the throttle to the motor, and come up with a throttle system.
I'll probably make a non-inverting op-amp circuit that will take 0-4k from a 10k pot and turn it into 0-5v for the motor.

Oh, and add a chain. That /shouldn't/ be hard, though.

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