Search found 34 matches

by makepeace
Nov 08 2014 6:25am
Forum: Stand-up E-scooters and E-skateboards
Topic: e-longboard build
Replies: 27
Views: 8157

Re: e-longboard build

Please please please fix those photo BBs, really keen to check yours out! Yeah I've just been using Solidworks cause it's what my uni provides for us. I haven't had any experience with other packages, but as a piece of software its VERY rough around the edges. I'm pretty keen to try out some other m...
by makepeace
Nov 07 2014 4:19pm
Forum: Stand-up E-scooters and E-skateboards
Topic: e-longboard build
Replies: 27
Views: 8157

Re: e-longboard build

howzit ek se! Yeah I checked them out before I ordered a while back and they look a bit suspect. Also, the stuff in their kits isn't entirely what we need :/ so would most likely have to get them to bring it in, but it would probably be quicker (and cheaper) to bring it in yourself. It's been a long...
by makepeace
Nov 07 2014 2:13am
Forum: Stand-up E-scooters and E-skateboards
Topic: e-longboard build
Replies: 27
Views: 8157

Re: e-longboard build

In terms of wire gauge, I think I calculated about 8 AWG a while back to be super safe, so yeah I guess I'll have to make provision for that mechanically. Yeah I'd be charging it like that, but the max charging rate is theoretically 2C. As they are in parallel, if I do 1C, I can theoretically charge...
by makepeace
Nov 06 2014 1:45pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Boosted Boards Offering New Models, Lowers Price of Original
Replies: 52
Views: 6778

Re: Boosted Boards Offering New Models, Lowers Price of Orig

Same. I don't know why you say it's prohibitive. You probably can't build a board with those base specs for less than $500 (on a DIY scale in any case). Markup of 200% is pretty reasonable I'd say for a product like this. I'm sure they've spent a lot of dev time and cash, and I'm sure people will bu...
by makepeace
Nov 06 2014 1:39pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Solar deck
Replies: 7
Views: 730

Re: Solar deck

Cells under the board would be pretty useless lol. Unless you develop a new type of sun that shines out of the road. I think that it could work. I thought about incorporating this and/or piezo transducers in the board. It's not going to charge the board in any practical amount of time, but coupled w...
by makepeace
Nov 06 2014 11:28am
Forum: Stand-up E-scooters and E-skateboards
Topic: e-longboard build
Replies: 27
Views: 8157

Re: e-longboard build

Would like a bit of comments/criticism on my idea for battery connections. From what I've read the safest and best (in terms of longevity) way to charge LiPos is in parallel. In my case, I'm making my own "custom" battery setup using single cells. I need 8s, so I will use 8 cells in series. I want t...
by makepeace
Nov 05 2014 11:45am
Forum: Stand-up E-scooters and E-skateboards
Topic: e-longboard build
Replies: 27
Views: 8157

Re: e-longboard build

Thanks for the comments. I've been using Solidworks for about 3 years, but mostly on and off for Uni assignments. Every time an idea props into my head I like to model it to see what it looks like so I've become pretty good. Regarding the putting the batteries where I intend to okp, why would you su...
by makepeace
Nov 05 2014 8:55am
Forum: Stand-up E-scooters and E-skateboards
Topic: e-longboard build
Replies: 27
Views: 8157

Re: e-longboard build

Update time. Ok so I've ended up going with HTD 5, 9mm belt in the end. Everything else was either too expensive or not strong enough to be durable. Ordered two of them from SDP, waiting on those. Also, I've settled on an RR of 2.5:1. This should get me crazy torque with the two motors and 8s and st...
by makepeace
Oct 24 2014 7:31am
Forum: Stand-up E-scooters and E-skateboards
Topic: Hendo Hoverboard and Lexus Hoverboard
Replies: 55
Views: 7599

Re: Hendo Hoverboard

This is entirely stupid and impracticable. 2015 my ass. Does it come with a 10 m copper roadway so you can ride around your garden for an hour until you get bored?

We're stuck with wheels for a while I'm afraid. At least until a cheap, small, light energy storage solution comes around.
by makepeace
Oct 12 2014 3:02pm
Forum: Stand-up E-scooters and E-skateboards
Topic: 10S custom skate ESC: testers wanted!
Replies: 1520
Views: 218039

Re: 10S custom skate ESC: testers wanted!

Sweet! Just a thought. And I'm glad it's not worth the bother :roll:
by makepeace
Oct 12 2014 2:46pm
Forum: Stand-up E-scooters and E-skateboards
Topic: 10S custom skate ESC: testers wanted!
Replies: 1520
Views: 218039

Re: 10S custom skate ESC: testers wanted!

Having motors on your board in any combination or position doesn't effect steering. With traditional trucks it's an impossibility. Leaning=Turning No, in principle I very much disagree. Think about what's physically happening. Take it to the extreme and say (with a dual diagonal) that your rear mot...
by makepeace
Oct 12 2014 1:25pm
Forum: Stand-up E-scooters and E-skateboards
Topic: 10S custom skate ESC: testers wanted!
Replies: 1520
Views: 218039

Re: 10S custom skate ESC: testers wanted!

Was doing some thinking.. For dual/quad motored boards, being able to provide an "augmented" steering effect by (slightly) slowing down the inside drive/speeding up the outside drive when toggling the nunchuck left or right could be interesting. I know that I'm not going to be able to do this with m...
by makepeace
Oct 09 2014 5:26pm
Forum: Stand-up E-scooters and E-skateboards
Topic: belts vs chains
Replies: 7
Views: 1797

Re: belts vs chains

you should just scale your RR based on the top speed to keep torque and speed characteristics the same. so work out your speed with your current RR and wheel diameter (Vt=w_motormax*RR*r_wheel) and work back to get your new RR based on new wheel diameter (RR=Vt/(w_motormax*r_newwheel). Either that o...
by makepeace
Oct 08 2014 4:11pm
Forum: Stand-up E-scooters and E-skateboards
Topic: stuff
Replies: 197
Views: 8355

Re: setting up the nunchuck

steps: - find the link to Austin's code on github in the nunchuck thread - download the code - have your uno + usb at hand - follow one of these guides until you have downloaded the arduino IDE, have your uno talking to your PC and made sure that you can upload code to it - open austin's wiiciever.i...
by makepeace
Oct 07 2014 5:13am
Forum: Stand-up E-scooters and E-skateboards
Topic: 10S custom skate ESC: testers wanted!
Replies: 1520
Views: 218039

Re: 10S custom skate ESC: testers wanted!

SDP-SI has models of their pulleys ready for download as STEP files; I just derive the geometry from there. Been itching to make a truly parametric drive pulley model, though... That was the first thing I tried. Took one look at the first profile I downloaded and did some measuring and it was *comp...
by makepeace
Oct 06 2014 7:18am
Forum: Stand-up E-scooters and E-skateboards
Topic: 10S custom skate ESC: testers wanted!
Replies: 1520
Views: 218039

Re: 10S custom skate ESC: testers wanted!

On a different note, I see you're using HTD belts in your products. How did you get the drawings done? I'm struggling since a few days to get a pulley designed in Solidworks. I also really struggled to find information on profiles.. Seems very elusive information (and no wonder, because all of the ...
by makepeace
Oct 05 2014 6:30pm
Forum: Stand-up E-scooters and E-skateboards
Topic: My in-da-hub motor mount attempt
Replies: 42
Views: 5277

Re: My in-da-hub motor mount attempt

4 of these converted to wye :twisted: that's what.. 20kW? but i'm sure those motors are way overrated.. they're so small!

edit: they can do 3kW electrical continuous.. that would be KILLER.
by makepeace
Oct 05 2014 12:23pm
Forum: Stand-up E-scooters and E-skateboards
Topic: 10S custom skate ESC: testers wanted!
Replies: 1520
Views: 218039

Re: 10S custom skate ESC: testers wanted!

Getting 28T GT2 3mm plastic pulley w/aluminium insert, 8mm bore for just over $6 from SDP, 255mm belt for just over $9. I figured plastic will be better as it's lighter and will cause less wear due to it absorbing more of the stress as it's a bit more elastic than aluminium. I think I'm going to ord...
by makepeace
Oct 05 2014 11:40am
Forum: Stand-up E-scooters and E-skateboards
Topic: 10S custom skate ESC: testers wanted!
Replies: 1520
Views: 218039

Re: 10S custom skate ESC: testers wanted!

lol! ok well in that case.. if it's tried and tested then i'll eat my humble pie. but yeah, more info about that setup would be needed to properly analyse. personally though i think that if it was properly designed heeding the design ratings there's no reason why practice should be much different fr...
by makepeace
Oct 05 2014 10:03am
Forum: Stand-up E-scooters and E-skateboards
Topic: Motor Review | SK3 6354 245KV -vs- NTM 5060 270KV
Replies: 15
Views: 5815

Re: Motor Review | SK3 6354 245KV -vs- NTM 5060 270KV

Cool video! Makes me feel good about my order of 2x NTM :D. I agree with the consensus that there are actually far too many variables in the setup to compare a single element ie the motors with a constant setup. It might be cool to compare the possible design setups, ie what kind of optimal performa...
by makepeace
Oct 05 2014 9:53am
Forum: Stand-up E-scooters and E-skateboards
Topic: 10S custom skate ESC: testers wanted!
Replies: 1520
Views: 218039

Re: 10S custom skate ESC: testers wanted!

6mm is very different to 9mm. If you're already on the edge at 9mm, 3mm over the edge is going exponentially reduce the amount of torque you can handle before slipping. for example a 24T, 3mm GT2, 6mm wide, 270mm belt length at 6000rpm can handle about 0.75 Nm. 9mm wide can do 1.125 Nm. The differen...
by makepeace
Oct 05 2014 8:10am
Forum: Stand-up E-scooters and E-skateboards
Topic: 10S custom skate ESC: testers wanted!
Replies: 1520
Views: 218039

Re: 10S custom skate ESC: testers wanted!

Ok maybe not 5 times. A bit of an exaggeration sorry :oops: , but by my calculations for 6000rpm, 24.83 PD, 9mm width and 270mm belt length its at least 1.5 times.. And that's excluding the fact that HTD belts always seem to be in the blue range that says "reduced service life to be expected", which...
by makepeace
Oct 05 2014 6:36am
Forum: Stand-up E-scooters and E-skateboards
Topic: 10S custom skate ESC: testers wanted!
Replies: 1520
Views: 218039

Re: 10S custom skate ESC: testers wanted!

Hmmm, I get what you're saying about the belts Svenska, however 2920 hrs is still not a gratuitously long life service life for this kind of product. If you ride for 1 hour a day, that's 8 years - never mind the abuse of an extreme environment with stones, sand etc getting into your drive. That's ab...
by makepeace
Oct 05 2014 5:35am
Forum: Stand-up E-scooters and E-skateboards
Topic: 10S custom skate ESC: testers wanted!
Replies: 1520
Views: 218039

Re: 10S custom skate ESC: testers wanted!

For me the option of the GT tooth profile doesn't have enough benefits over HTD to warrant using it..... Also there are some commercial reasons why i don't use it.. This doesn't make any sense. I would think that actually being able to transmit the required power at reasonable pitch diameters is en...