|3D printed steering column support|
|The tube was too small so I had to improvise.|
|Brakes partially complete|
|Brake assembly after a bit of use|
At this point, the kart was complete. I rode it up and down the street many many times. I did a few time trials and found that I was going about 17 miles/hour. It was fun, but I wanted MORE. So I bypassed the current shunt on the controllers. this involved removing the loop of wire in the picture below and replacing it with a shorter copper wire. The picture below also shows the capacitor that fell out of one of the controllers when I opened it. I guess it wasn't important. I soldered it back in anyway.
This was a huge success. Big boost in acceleration and about a 30mph top speed. As a result, I was blowing 60A fuses like it was my job. At 33V, that's two '350W' controllers burning through 1kW each. Below are two of three that I blew the first week. After that, I was more careful and did fewer 'full-throttle-from-a-stop' runs. I had 5" wheels - the acceleration was something fierce, I'm tellin ya.
Sadly, all good things must end. Not that my controllers were particularly good, but they both died after about three weeks with the current boost.
Just for fun, I threw a controller on the left motor and did a few runs up and down the street. I ran into my friend Amir, who took a lovely picture and then went on his way.
Summer also participated in the Imagineering 500 and took both first and last place.
Current status: I have two Kelly KBS36101 controllers and sensors mounted on both motor cans. Rear wheels have been replaced with razor scooter wheels that come with brakes! I need to mount the controllers, wire precharge circuitry for the controllers, attach throttle, sensors, power and finish the brake supports/cabling. I'll also probably redo the steering column and have something a little more robust holding the handlebars in place.