Search found 394 matches

by Dui, ni shuo de dui
Jul 23 2019 9:56pm
Forum: Motor Technology
Topic: Sabvoton software unlock?
Replies: 10
Views: 1363

Re: Sabvoton software unlock??? Will pay$$$

Unfortunately, the software for programming most controllers cant' read the actual controller values. So what you see on the screen is usualy just whatever you set it to, not what the controlelr actually accepted. That's not the case on Sabvoton controllers. The software reads the actual values set...
by Dui, ni shuo de dui
Jul 21 2019 9:40pm
Forum: Stand-up E-scooters and E-skateboards
Topic: 10kW stand-up scooter with air suspension
Replies: 226
Views: 46605

Re: 10kW stand-up scooter with air suspension

Lol, no goodbye, just put it in a crate and there it goes ! :lol: :lol:

That's sad to see it leaving, but I'm super excited to see what you are going to build... I'm sure it will be amazing.
by Dui, ni shuo de dui
Jul 18 2019 1:31am
Forum: Battery Technology
Topic: Soldering to aluminium
Replies: 6
Views: 484

Re: Soldering to aluminium

Something which was discussed at length a long time ago, especially when folks were buying A123 pouch cells, was the issue of how to terminate them. Soldering has long been a popular way of terminating pouch cells in the RC world, but that's because the tabs are usually copper - either nickel or ti...
by Dui, ni shuo de dui
Jul 15 2019 10:34pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Yamaha FZR-8000 Genesis
Replies: 45
Views: 7725

Re: Yamaha FZR-8000 Genesis

Things start getting awesome, kudos on your box build! If it's not already too late, maybe try to leave some transparent areas so you can check for humidity or other things without having to open the box later. As for the phase wires being too short, this could be a good thing for you actually. What...
by Dui, ni shuo de dui
Jul 14 2019 9:49pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Ezip 750 overvolting.
Replies: 9
Views: 745

Re: Ezip 750 overvolting.

If you're running a 24v system on a 36v battery, the voltage cutoff is so low I don't believe you're hitting it without destroying the battery. Been there, done that. Oh yeah I think you're right. In the first post when he said "I run an old EZip 750 scooter at 36v thru the 24 controller" I assumed...
by Dui, ni shuo de dui
Jul 11 2019 12:59am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Ezip 750 overvolting.
Replies: 9
Views: 745

Re: Ezip 750 overvolting.

I run an old EZip 750 scooter at 36v thru the 24 controller. The motor just doesn't heat up even with this voltage and my 200 lbs. after a full charge run on the beach in sand, etc. However, I think the controller is cutting out after it heats up toward the end of a ride or after a really steep hil...
by Dui, ni shuo de dui
Jul 07 2019 9:54pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Help with buying Chinese made electric motorcycle
Replies: 10
Views: 1439

Re: Help with buying Chinese made electric motorcycle

3KW might get you 40MPH+, it isn't going to accelerate all that fast. My CrazyBike2 had 4KW, and with me on it at my lower weight then was around 400lbs with all the tools/lunch/work crap I carried in the cargo pods/etc, and I could do 4 seconds or less to 20MPH (that's the speed limit here for ebi...
by Dui, ni shuo de dui
Jul 04 2019 12:48am
Forum: Stand-up E-scooters and E-skateboards
Topic: Test The Brake Lever Switch help
Replies: 131
Views: 8613

Re: Test The Brake Lever Switch help

Ok, stopped the charge 29.4 V , as expected the charger still had the red light when disconnected. However after LCD reset it displayed 29,2 V. (Had no idea that could happen) Motor started at this voltage, so one can presume that at 29.4 it will start as well? Instead of presuming you can do some ...
by Dui, ni shuo de dui
Jun 20 2019 8:27pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Nova Cruz Voloci Scooter/Bike Info
Replies: 196
Views: 35629

Re: Nova Cruz Voloci Re-vamp

if its not under load I doubt it would fail stock. a no load bench test wont prove anything IMO. This wrap is a good idea just not sure when I will get around to it at the moment. Yeah, I don't know. Without load you can at least check that it resists the centrifugal forces, it will spin faster wit...
by Dui, ni shuo de dui
Jun 20 2019 2:20am
Forum: Stand-up E-scooters and E-skateboards
Topic: Donut wheel scooter news
Replies: 27
Views: 2778

Re: Donut wheel scooter news

That seems like a moronic debate. Everything can be dangerous if you don't know how to use it, and even if you know. Accidents happens. I bet there are much more stairs related incidents in the US than scooter incidents all around the globe combined, is it a reason to forbid stairs? http://news.bbc....
by Dui, ni shuo de dui
Jun 19 2019 10:17pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Nova Cruz Voloci Scooter/Bike Info
Replies: 196
Views: 35629

Re: Nova Cruz Voloci Re-vamp

hmm ill have to give this some thought, I do have 50 motors to try it on... what size would you use? When I google the stuff it looks like yellow yarn, way too thick 45lb rated? I would probably use carbon fiber instead of aramid/kevlar actually. Carbon it much stiffer/less susceptible to deformati...
by Dui, ni shuo de dui
Jun 19 2019 1:19am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Denzel 72v 4-spd Gearbox Build 125cc Dual Sport
Replies: 59
Views: 7556

Re: Denzel 72v 4-spd Gearbox Build DB17

I really wonder why they put the motor on the side like this. It takes a lot of space, it protrudes a lot. It's not really well suited for a 2 wheeler. Would have been much better if the motor was on top or slightly in front of the gearbox unit. They probably didn't want to bother with modifying the...
by Dui, ni shuo de dui
Jun 18 2019 9:14pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Nova Cruz Voloci Scooter/Bike Info
Replies: 196
Views: 35629

Re: Nova Cruz Voloci Re-vamp

It might be a little late, but to solve your magnet problem, have you thought about using some kevlar wire all around the rotor? Just dip them in epoxy and as long as they don't touch the stator there should be no way that your magnets will fly off again. that could work? ive never worked with Kevl...
by Dui, ni shuo de dui
Jun 17 2019 9:01pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Nova Cruz Voloci Scooter/Bike Info
Replies: 196
Views: 35629

Re: Nova Cruz Voloci Re-vamp

It might be a little late, but to solve your magnet problem, have you thought about using some kevlar wire all around the rotor?
Just dip them in epoxy and as long as they don't touch the stator there should be no way that your magnets will fly off again.
by Dui, ni shuo de dui
Jun 17 2019 2:06am
Forum: Stand-up E-scooters and E-skateboards
Topic: Winter Project... Design and Build an eScooter
Replies: 38
Views: 5258

Re: Winter Project... Design and Build an eScooter

Sweeet! Great build, and I bet it should run very well. The only little remark I would make is the size of the main connector attached to the copper busbar, it seems a little undersized compared to the rest. But I don't know how many amps you plan on pulling through it, so that might be ok. Anyways,...
by Dui, ni shuo de dui
Jun 17 2019 12:45am
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1017
Views: 86761

Re: APL's DIY axial-flux motor

While your motor is still opened, take a little time to make sure your magnets fields are correctly oriented, just in case.
by Dui, ni shuo de dui
Jun 16 2019 10:46pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: YZF600R Thundercat EV
Replies: 138
Views: 38107

Re: YZF600R Thundercat EV

Nice progress!
Just, could you post bigger pictures? We can't really see much :(
by Dui, ni shuo de dui
Jun 16 2019 10:22pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Build Options
Replies: 14
Views: 1521

Re: Build Options

three vendors have a 17" in the 3-5kw versions. I'm leaning towards the NBPower 5kw kit but also looked into the QS. If you're going to build 3kw and the 5kw is not much more why not? if 72v/32Ah is a minimum it is what it is. the NB hub comes with a 100A sine wave programmable controller but I'll ...
by Dui, ni shuo de dui
Jun 14 2019 12:56am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Build Options
Replies: 14
Views: 1521

Re: Build Options

That looks like a sweet, lightweight ride. What I would do: -remove the current subframe and build another one that goes to the bottom: This way you'd have lots of space for a big battery and no need to build it in a weird shape. -Find a way to remove the rubbish front brake, in order to replace it ...
by Dui, ni shuo de dui
Jun 13 2019 9:31pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1017
Views: 86761

Re: APL's DIY axial-flux motor

As far as cutting the plates, there has been some previous discussion about it back around page 11 or so. It keeps coming up, but the current plan is to cut an 'L' in the side of the slot, and place a non ferrous pin into a hole drilled in the cut, as a lock of sorts. The second solution seem like ...
by Dui, ni shuo de dui
Jun 13 2019 5:04am
Forum: Battery Technology
Topic: Which cell for long lasting battery
Replies: 32
Views: 3794

Re: Which cell for long lasting battery

It seems to me like you didn't really test each cell, did you?
Are you sure that there is not one weak paralleled group?

Could be that you just got one or a few bad cells and that the rest is fine, so the BMS shuts down/indicates a low SOC because of these while the rest is still fine.
by Dui, ni shuo de dui
Jun 12 2019 9:52pm
Forum: Motor Technology
Topic: APL's DIY axial-flux motor
Replies: 1017
Views: 86761

Re: APL's DIY axial-flux motor

Thanks Dui, ni shuo de dui. Spacers are 1/2" flat stock, and I used a large end mill and just plunge cut the pieces in the vice. Mostly eyeballed it, and massaged it as I went. A couple of chamfers on the tops, and a bit of belt sanding. The only really precise cuts were the length of the spacers, ...
by Dui, ni shuo de dui
Jun 12 2019 8:23pm
Forum: Motor Technology
Topic: RC ESCs in a real size motorbike? How stupid would that be?
Replies: 7
Views: 730

Re: RC ESCs in a real size motorbike? How stupid would that be?

It doesn't have hall sensors. Sensorless startup on a hub with high power will probably blow it quickly. Good point, I didn't pay attention to that. It won't have good power handling capability. Look at the physical size. Not all controller regimes are that efficient. Even at 95% efficiency it stil...
by Dui, ni shuo de dui
Jun 12 2019 4:22am
Forum: Motor Technology
Topic: RC ESCs in a real size motorbike? How stupid would that be?
Replies: 7
Views: 730

Re: RC ESCs in a real size motorbike? How stupid would that be?

If it's like the rest of the RC controllers people have used on here, big or small, they don't like high startup loads for very long, and don't usually have any way to actually monitor what's going on and react to it, so they blow up on startup. Not always the frist time, but eventually. That's wha...