Search found 19 matches

by alexaus
Feb 04 2017 2:36am
Forum: E-Bike Technical
Topic: Specific heat absorption capacity of disc brakes
Replies: 147
Views: 11934

Re: Specific heat absorption capacity of disc brakes

The Shimano Ice Tech rotors and brakes work really well. The secret is the stainless steel-aluminium-stainless steel sandwich of the rotors braking tracks, which is riveted to the aluminium spider. The heat capacity is about the same, but the thermal conductivity of the rotor from the braking track ...
by alexaus
May 15 2016 6:32am
Forum: Stand-up E-scooters and E-skateboards
Topic: Evolve Carbon GT
Replies: 10
Views: 2621

Re: Evolve Carbon GT

Good to see they've moved away from the old heavy ass inrunner. That thing was a big problem since it was so heavy and forever cracking from its own weight. Hopefully the ESC has smoother braking too. I wonder what the power is? Evolve's old system could only manage about 800 W peak and more like 4-...
by alexaus
May 05 2016 5:02am
Forum: Stand-up E-scooters and E-skateboards
Topic: Truck Modification for Enertion Nylon Pulley
Replies: 19
Views: 1353

Re: Truck Modification for Enertion Nylon Pulley

I agree mostly. Skipping is bad, and will chew up the belts teeth. Making it skip more - vicious cycle till it's broken or useless/stripped. I have had several boards w/ regular aluminum/steel pulleys and know it was tensioned correctly - but it's been a minute and i'll re-tighten it before the nex...
by alexaus
May 04 2016 6:10am
Forum: Stand-up E-scooters and E-skateboards
Topic: Truck Modification for Enertion Nylon Pulley
Replies: 19
Views: 1353

Re: Truck Modification for Enertion Nylon Pulley

I'm running a Nylon wheel pulley on my GF's board (9mm wide). It's holding up OK. It does click/skip more than an aluminum. For her lighter weight and top speed of around 8mph (not kidding - she likes to go SLOW) - it works. For me - i would stick with aluminum personally. Less expensive - definite...
by alexaus
May 04 2016 5:58am
Forum: Stand-up E-scooters and E-skateboards
Topic: Truck Modification for Enertion Nylon Pulley
Replies: 19
Views: 1353

Re: Truck Modification for Enertion Nylon Pulley

Yeah, I think Boosted figured out that extended axles are a bad idea. I recently designed a 33T HTD 5M-15 pulley that can be 3D printed in Nylon and screwed onto a Kegel wheel with 5x M6x65 SHCS. I only got to test my design for about 10 km before my board stopped syncing with the remote, but it se...
by alexaus
May 04 2016 5:52am
Forum: Stand-up E-scooters and E-skateboards
Topic: Truck Modification for Enertion Nylon Pulley
Replies: 19
Views: 1353

Re: Truck Modification for Enertion Nylon Pulley

Hmm, I wonder how well abs would hold up. I have access to a commercial grade printer that does ABS. I think I'll try it and get back to you guys. I could always CNC it if the ABS doesn't work aswell. ABS would probably work for a bit. With my design, the part doesn't have to be all that strong bec...
by alexaus
May 03 2016 5:33am
Forum: E-Vehicles General Discussion
Topic: AWD without differentials?
Replies: 32
Views: 4591

Re: AWD without differentials?

First, I wanna say that I think the phrase "torque vectoring" is a very funny phrase and it doesn't really make sense. Torque is already a vector, so you could say that every electric motor already has "torque vectoring". In fact, I would argue that the phrase "torque scalaring" is actually more acc...
by alexaus
May 03 2016 3:17am
Forum: Stand-up E-scooters and E-skateboards
Topic: Truck Modification for Enertion Nylon Pulley
Replies: 19
Views: 1353

Re: Truck Modification for Enertion Nylon Pulley

Be aware that turning down the hanger makes it a lot easier for the axle to bend from normal use (hitting bumps). I've had this problem consistently with my Evolve board. Consider a pulley which screws directly to the wheel and doesn't have its own bearing. That way you don't have to turn down the ...
by alexaus
May 03 2016 3:06am
Forum: Stand-up E-scooters and E-skateboards
Topic: pneumatic wheels - pros and cons?
Replies: 11
Views: 804

Re: pneumatic wheels - pros and cons?

They use a lot less energy, so your range is increased compared to using pneumatics. ah yea, thats a really good point! you can see the difference very well in the evolve portfolio: a carbon street has max range of 40km, a carbon all terrain a max range of 25km! its the same battery, I had both set...
by alexaus
May 02 2016 11:46pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Can brushless motors get water damage?
Replies: 5
Views: 752

Re: Can brushless motors get water damage?

As others said you really only have to worry about corrosion of the core and bearings/shaft. If you're planning to ride in rain a lot maybe see if you can get more bearings for the motor and take a look and see how well the core is sealed/coated. Worst case is your thing gets rusty and you efentuall...
by alexaus
May 02 2016 11:42pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Jelly Board - .22 bulletproof transparent glass-like decks!
Replies: 14
Views: 1727

Re: Jelly Board - .22 bulletproof transparent glass-like dec

These things don't even have grip tape??? How the hell are you supposed to not slip off? I'm sure they look horrible too if you ride through a small puddle or wet pavement. I like how they even have the gall to print a "7 OTHER" resin identifier on the deck, as if anyone ever recycles polycarbonate....
by alexaus
May 02 2016 11:35pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Truck Modification for Enertion Nylon Pulley
Replies: 19
Views: 1353

Re: Truck Modification for Enertion Nylon Pulley

Be aware that turning down the hanger makes it a lot easier for the axle to bend from normal use (hitting bumps). I've had this problem consistently with my Evolve board. Consider a pulley which screws directly to the wheel and doesn't have its own bearing. That way you don't have to turn down the t...
by alexaus
May 02 2016 8:29pm
Forum: Stand-up E-scooters and E-skateboards
Topic: pneumatic wheels - pros and cons?
Replies: 11
Views: 804

Re: pneumatic wheels - pros and cons?

For my commuting, it's nice to have smaller polyurethane wheels. They use a lot less energy, so your range is increased compared to using pneumatics. They also can't get punctured, and can last thousands of km. My 80a Kegels have done at least 3000 km with plenty of carving and fun and rough pavemen...
by alexaus
May 02 2016 8:24pm
Forum: Stand-up E-scooters and E-skateboards
Topic: Marbel Board! (FINALLY!)
Replies: 42
Views: 7751

Re: Marbel Board! (FINALLY!)

Also curious to see how they're holding up. I've got an Evolve bamboo street and apparently I ride it way too hard for what the hardware is designed for. One issue is with the drive wheel setup. Both Evolve and Marbel here are using a shortened hanger on the drive side, which means the steel axle st...
by alexaus
May 01 2016 11:28pm
Forum: Stand-up E-scooters and E-skateboards
Topic: looking for Kegel Drive wheel Gear
Replies: 21
Views: 1713

Re: looking for Kegel Drive wheel Gear

Hey everyone, sorry I didn't post my thing earlier. I was busy with an assignment and I had to update the model a little bit to add flanges so that the belt wouldn't ride up over the edge. http://www.thingiverse.com/thing:1523057 My lame Evolve board stopped connecting to its remote, so I can't do m...
by alexaus
Apr 26 2016 10:20pm
Forum: Stand-up E-scooters and E-skateboards
Topic: looking for Kegel Drive wheel Gear
Replies: 21
Views: 1713

Re: looking for Kegel Drive wheel Gear

Here is my blog post. It doesn't have a link yet for the parts on thingiverse because I just made an account there and you have to wait 24 hours before publishing things. I'll post a link here and on the blog once I can publish it.

https://admechatronics.wordpress.com/20 ... rocket-v7/
by alexaus
Apr 26 2016 5:15pm
Forum: Stand-up E-scooters and E-skateboards
Topic: looking for Kegel Drive wheel Gear
Replies: 21
Views: 1713

Re: looking for Kegel Drive wheel Gear

Yeah definitely! Just need to make the post on the blog first. I printed the thing last night while having a party haha, going to ride it to university today to make sure it's all good. When I have some free time today I'll post it up.
by alexaus
Apr 26 2016 9:37am
Forum: Stand-up E-scooters and E-skateboards
Topic: looking for Kegel Drive wheel Gear
Replies: 21
Views: 1713

Re: looking for Kegel Drive wheel Gear

I just 3D printed my 7th iteration of a Kegel drive gear, 33T HTD 5M-16 mm width. It's for my Evolve board but I designed this one to work on any skateboard truck as long as the hanger is <21 mm diameter. Hardware is just 5x M6x65 socket head cap screws and M6 nyloc nuts. You need to drill out the h...
by alexaus
Mar 23 2016 7:25am
Forum: Stand-up E-scooters and E-skateboards
Topic: eLongboard - plastic is fantastic :D
Replies: 69
Views: 8792

Re: eLongboard - the elements printed on a 3D printer

Wow, awesome modelling and design work. I will, however, be surprised if everything can actually hold up. Some of the shocks a board experiences when hitting bumps or gaps in the road/path are pretty extreme. If they can crack aluminium and bend steel, ABS is gonna have a hard time I reckon. How are...