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  1. J

    Electric Mountain Board Build log

    Quick update, Alien ESC arrived, programmed it, temporarily ziptied everything to the board and took it for a drive. less cogging, but pretty easy to get moving. I ran my 5mah battery down pretty quick, its a 7s, and i ran it down under 14 volts a few times before i realized how dangerous that...
  2. J

    Electric Mountain Board Build log

    How do you have yours timed?
  3. J

    Electric Mountain Board Build log

    negative I have ordered it. Currently I am using dual Hobbyking brand 150a ESC, they have very few options, and the few options dont seam to do anything different. and both controllers have the same settings enabled, but each one controls a little differently.
  4. J

    Electric Mountain Board Build log

    He seems to have a great rep, so im not worried about it.
  5. J

    Electric Mountain Board Build log

    I will have to give this a try when i get the controller. on a second note I orderered those items @ http://alienpowersystem.com/ a week or so ago, it still says processing and I sent an email a couple days ago requesting an update. is he "I believe its bruno" typically pretty quick I know...
  6. J

    Electric Mountain Board Build log

    I dont foresee myself loosing weight :P doesn't work for me either. I dont seam to have any problems with the 8 tooth sprocket, but I do have really good alignment. The hobbyking ESCs are set to soft start, but they still start off very aggressively.
  7. J

    Electric Mountain Board Build log

    I have not, Im hoping that the Alien Power systems twin 125 will be the ticket.
  8. J

    Electric Mountain Board Build log

    Im actually running 5.625:1 gearing, 45 teeth on wheels 8 tooth on motors, the problem with going lower is it will accelerate even faster. Im 230lbs my 150lb freind can get on it and not have any cogging issues. Im really hoping that the alien ESC is just more efficient and more programable...
  9. J

    Electric Mountain Board Build log

    Ok so my new gear ratio works with a little cogging but its acceptable. I will say this, This thing is dangerous. Im really debating going sensored if I cant calm the acceleration down with the new ESC. Currently here is how starting off goes: 1. you start to minimally cog 2. tires start to...
  10. J

    Electric Mountain Board Build log

    I used the batteries themselves to make the box. I put a cork spacer on the terminals and some cardboard on the sides to give me room. I then wrapped it up in a few layers of bags. I then taped it up in a layer of aluminum tape used for hvac work since the resin won't stick to it. I then use...
  11. J

    Electric Mountain Board Build log

    Since it looks like the project is going to come together here soon I decided to go ahead and make a battery box for my 8s 20ah LiFePo4 battery pack. It is made from Smooth On Smooth-Cast 321 Urethane resin. I applied it like fiberglass, I added milled glass fiber and used fiberglass mat in...
  12. J

    Electric Mountain Board Build log

    You are entirely correct. When I found this forum I had already built my board and had it working with a brushed motor. I incorrectly assumed that the brushless motor would work the same. I also wish I had not purchased the hobbyking brand ESCs. You live and you learn.
  13. J

    Electric Mountain Board Build log

    So yesterday I finished up the mounts, so I thought, I had to weld a brace from mount to mount. By the way, stainless is a PIA to weld with mig, even with the right wire, my stainless welds are not pretty but they will do the job. I am just barely able to start without cogging, but when I do...
  14. J

    Electric Mountain Board Build log

    I actually ordered an entire board from Amazon: http://www.amazon.com/gp/product/B002ZFBYYY/ref=oh_details_o03_s00_i00?ie=UTF8&psc=1 It was a damaged product and was less than 100$, ended up just cosmetic damage to the packaging, and free shipping w/amazon prime. The deck is now just a garage...
  15. J

    Electric Mountain Board Build log

    So tonight I finished up the new motor mounts, they are made from 304 stainless tubing cut down just a bit. Since I already had one ESC ready to go I decided to give it a try with the new gear reduction with just one motor. Still wouldnt, but It felt a lot better than with the 9:35 reduction...
  16. J

    Electric Mountain Board Build log

    Ive thought about hall sensors, i havnt decided on that just yet. The welding job, its sound. It flexes a fraction of an inch. Before I made the board I drew it up in autodesk inventor and ran a Finite Element Analysis on it, basically a computer generated stress test, I took alot of material...
  17. J

    Electric Mountain Board Build log

    MK1 About a month ago i decided to weld up a skate board frame. 38" long , .5" square tubing with .0625 wall thickness. Mig welded together and welds ground flat on top and bottom. weight 9ish pounds. So then I decided to add a 24 volt electric wheel chair motor (brushed of unknown...
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