mikkelibob
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project - manco scorpion electric kart.
stuff: me0909, alltrax AXE 4834, 36v (old 12v 18ah mower batteries for now).
I have a few questions:
battery placement - off road go karts, like mine, often have the little shelf thing that's part of the main frame, that floats above the rear swing arm. It seems like the perfect place for the controller and contactor, but is it too high for the batteries? I don't want to have a potential projectile behind my cranium, but even if I have space next to the motor on the rear swingarm, it seems like I should isolate the batteries from the vibration (to the extent the suspension smooths out the ride of the kart at all). As a fall back I could put batteries next to the drive, but I'd like to save room for a passenger.
wiring question - I've got an alltrax controller and a me0909. I've got precharge resistor, contactor, and diode on the way. But I would really like to see a picture of things wired up on an actual system. For instance, I'm not totally sure how the contactor looks all wired up. A step by step look would be great. There's probably something already like out there, doesn't anybody know where? Also not sure if I need a big kill switch button, and if so, where it goes in the wiring diagram.
great ratio question - I think the me0909 does about 3000rpm at 36v maxed. Kart has 11T sprocket (smallest I can find on a 7/8 shaft), 60T drive sprocket on live axle, and 18 inch rear tires. That's a 5.45:1 ratio. I'm less concerned about high speed (12-15mph would be fun) as more concerned about plowing through high grass on ill maintained ranch roads. Should I try to add an intermediate jackshaft, or just trust in the almighty torque of electric?
stuff: me0909, alltrax AXE 4834, 36v (old 12v 18ah mower batteries for now).
I have a few questions:
battery placement - off road go karts, like mine, often have the little shelf thing that's part of the main frame, that floats above the rear swing arm. It seems like the perfect place for the controller and contactor, but is it too high for the batteries? I don't want to have a potential projectile behind my cranium, but even if I have space next to the motor on the rear swingarm, it seems like I should isolate the batteries from the vibration (to the extent the suspension smooths out the ride of the kart at all). As a fall back I could put batteries next to the drive, but I'd like to save room for a passenger.
wiring question - I've got an alltrax controller and a me0909. I've got precharge resistor, contactor, and diode on the way. But I would really like to see a picture of things wired up on an actual system. For instance, I'm not totally sure how the contactor looks all wired up. A step by step look would be great. There's probably something already like out there, doesn't anybody know where? Also not sure if I need a big kill switch button, and if so, where it goes in the wiring diagram.
great ratio question - I think the me0909 does about 3000rpm at 36v maxed. Kart has 11T sprocket (smallest I can find on a 7/8 shaft), 60T drive sprocket on live axle, and 18 inch rear tires. That's a 5.45:1 ratio. I'm less concerned about high speed (12-15mph would be fun) as more concerned about plowing through high grass on ill maintained ranch roads. Should I try to add an intermediate jackshaft, or just trust in the almighty torque of electric?
