AT-One electric inline skates (quick update Feb 2019)

Lightweight / Folding / Portable EVs - seats optional
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Vanarian   10 kW

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Re: AT-One electric inline skates (quick update April 2018)

Post by Vanarian » Jun 28 2018 7:23am

If you wanna try VESC despite the stories, note that it had become a lot more user friendly now with VESC-Tool! Auto detection helps a lot to get adequate parameters for your motor.

Yep, gonna have to either cut the frames or adapt a sub frame to it! I've ridden many miles with 2 wheels per skate (analog) to directly feel the difference versus all wheels mounted, really IMHO it is better to keep the middle wheels if you can!
-+AT-One project : electric inline skates - no remote, hub motors, one frame for various wheel sizes & quasi-universal boot mount

Rollo Ergo Sum!

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Dogu-ya   1 mW

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Re: AT-One electric inline skates (quick update April 2018)

Post by Dogu-ya » Jun 28 2018 10:29pm

Vanarian wrote:
Jun 28 2018 7:23am
If you wanna try VESC despite the stories, note that it had become a lot more user friendly now with VESC-Tool! Auto detection helps a lot to get adequate parameters for your motor.

Yep, gonna have to either cut the frames or adapt a sub frame to it! I've ridden many miles with 2 wheels per skate (analog) to directly feel the difference versus all wheels mounted, really IMHO it is better to keep the middle wheels if you can!

I'll be fabricating a frame for larger wheels.
I skate slalom so the idea of losing the middle wheels is daunting too since I'm only on my middle wheels most of the time.
I'm betting 2 outer wheels only has horrible maneuverability.

Can't help it though, since I'm going the old fashioned mechanical drive train route, I need a ton of space to mount the components.
This is likely going to turn out as a personal use project, commercially it's looking like no way...
This is the beauty of DIY projects though, I make what I want, no matter how much it snubs convention.

I'll post another render soon, I'm on my 3rd design iteration and it's looking like some kind of a motorbike-ish death machine.

Hastily, I've sent my clutch off for fabrication, I was planning to make a 3D printed proof of concept first but my friend who does 3d printing quoted me 1/4 the cost of what my fabricator quoted to make it out of steel, inclusive of latter adjustments to improve free running tolerances.

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Dogu-ya   1 mW

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Re: AT-One electric inline skates (quick update April 2018)

Post by Dogu-ya » Jul 03 2018 1:09am

I'm impressed by these little bldc motors, they put out a lot of horsepower for their miniature size.
5065 motor 1.PNG
5065 motor 1.PNG (351.5 KiB) Viewed 648 times
5065 motor 2.PNG
5065 motor 2.PNG (241.09 KiB) Viewed 648 times
5065 motor 3.PNG
5065 motor 3.PNG (243.02 KiB) Viewed 648 times
5065 motor 4.PNG
5065 motor 4.PNG (219.74 KiB) Viewed 648 times
5065 motor 5.PNG
5065 motor 5.PNG (286.92 KiB) Viewed 648 times
https://grabcad.com/library/5065-bldc-outrunner-motor-1

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Vanarian   10 kW

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Re: AT-One electric inline skates (quick update April 2018)

Post by Vanarian » Jul 03 2018 2:48pm

Yep ! These are a good choice to start with. I forgot, do you want to FWD, RWD or AWD your skates with the clutch ?
-+AT-One project : electric inline skates - no remote, hub motors, one frame for various wheel sizes & quasi-universal boot mount

Rollo Ergo Sum!

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Dogu-ya   1 mW

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Re: AT-One electric inline skates (quick update April 2018)

Post by Dogu-ya » Jul 03 2018 10:37pm

Vanarian wrote:
Jul 03 2018 2:48pm
Yep ! These are a good choice to start with. I forgot, do you want to FWD, RWD or AWD your skates with the clutch ?
Only RWD or FWD, depends on how it feels when accelerating, that will be a later stage. Currently working with RWD design, just because it seems conventional.
The clutch allows for freewheeling both forwards and backwards.

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Dogu-ya   1 mW

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Re: AT-One electric inline skates (quick update April 2018)

Post by Dogu-ya » Aug 22 2018 10:56pm

Small update,

Got my old 3d printer out to make some prototypes.
Getting the printer repaired, set up and calibrated and printed parts to fit with each other took almost all my time till now.

Starting to print a few clutch designs I have for a proof of concept.

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Vanarian   10 kW

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Re: AT-One electric inline skates (quick update April 2018)

Post by Vanarian » Feb 13 2019 5:05am

Dogu-ya wrote:
Aug 22 2018 10:56pm
Small update,

Got my old 3d printer out to make some prototypes.
Getting the printer repaired, set up and calibrated and printed parts to fit with each other took almost all my time till now.

Starting to print a few clutch designs I have for a proof of concept.
Hey ! Did you manage to keep working on your build ? Just a random thought, can you piggyback mount the clutch at the back of your frame ? This way you can keep middle wheels in ! If you wanna do some light test you can try using PETG or Nylon filament, for pulley driving it is ok.

I still got tolerances to sort out (and damn enclosures are a headache to work with when you go past the "square box" format) !
-+AT-One project : electric inline skates - no remote, hub motors, one frame for various wheel sizes & quasi-universal boot mount

Rollo Ergo Sum!

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Re: AT-One electric inline skates (quick update Feb 2019)

Post by Wolf1113 » Feb 27 2019 11:12am

I have looked into a few of these reviews. The most common issue in I've come across is the battery. In my opinion I think having a battery is a good idea, but not as the main power source. Making a cover that goes over the top of the foot using mini solar panels. The battery however can be used a back up. Not only that I believe that the solar panels in the clear cover on the skateboard or inline skates can also be used to charge the battery with a cutoff mechanism to stop it from overcharge. Most people would skate during the day anyway. Another thing that is possible for this future of skating is speed setting. At most 15-20mph. Just my own opinion on the speed part.

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Re: AT-One electric inline skates (quick update Feb 2019)

Post by Hummina Shadeeba » Feb 27 2019 1:02pm

Id like having a tiny battery so less weight. I see panels for sale today are able to capture about 22% of the sun energy and the best panels designed capture about 44%.

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Vanarian   10 kW

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Re: AT-One electric inline skates (quick update Feb 2019)

Post by Vanarian » Feb 28 2019 5:03am

Wolf1113 wrote:
Feb 27 2019 11:12am
I have looked into a few of these reviews. The most common issue in I've come across is the battery. In my opinion I think having a battery is a good idea, but not as the main power source. Making a cover that goes over the top of the foot using mini solar panels. The battery however can be used a back up. Not only that I believe that the solar panels in the clear cover on the skateboard or inline skates can also be used to charge the battery with a cutoff mechanism to stop it from overcharge. Most people would skate during the day anyway. Another thing that is possible for this future of skating is speed setting. At most 15-20mph. Just my own opinion on the speed part.
Welcome to E-S (and my topic) ! Thanks for your suggestions ; if solar panel's efficiency was high enough it could definitely be a way to charge up (and have for example a capacitor bank to act as regulator between continuous current charging and system's use).

Maybe when there's a breakthrough with solar energy :wink:

Totally agree about the cutoff (brake chopper) mechanism : it is definitely a must even with a normal battery, to make sure voltage doesn't rise above max battery voltage. It's a safety device which should be more often found on EVs IMO.

About the max speed however I'm kinda a speed addict (and depending where I live I ride both in day and night haha) but advanced ESC is able to progressively limit speed up to 20mph (even less for countries where it might be best not to go above 15mph for example). So I'm more aiming to have a "user limit" or "safe mode" + an overall config able to push high speeds.
Hummina Shadeeba wrote:
Feb 27 2019 1:02pm
Id like having a tiny battery so less weight. I see panels for sale today are able to capture about 22% of the sun energy and the best panels designed capture about 44%.
Man I can't skip the powerhouse battery if I want to race you ! BTW I'm still training analog, did 30mph downhill this weekend and it seems I need to be able to manage myself at up to 50mph if I want to compete with the big guys. :flame:

Definitely cannot reach such speeds on a board but on inlines I just enjoy it too much!! :mrgreen:
-+AT-One project : electric inline skates - no remote, hub motors, one frame for various wheel sizes & quasi-universal boot mount

Rollo Ergo Sum!

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Dogu-ya   1 mW

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Re: AT-One electric inline skates (quick update April 2018)

Post by Dogu-ya » Mar 03 2019 10:08pm

Vanarian wrote:
Feb 13 2019 5:05am
Dogu-ya wrote:
Aug 22 2018 10:56pm
Small update,

Got my old 3d printer out to make some prototypes.
Getting the printer repaired, set up and calibrated and printed parts to fit with each other took almost all my time till now.

Starting to print a few clutch designs I have for a proof of concept.
Hey ! Did you manage to keep working on your build ? Just a random thought, can you piggyback mount the clutch at the back of your frame ? This way you can keep middle wheels in ! If you wanna do some light test you can try using PETG or Nylon filament, for pulley driving it is ok.

I still got tolerances to sort out (and damn enclosures are a headache to work with when you go past the "square box" format) !
Hi Vanarian,

Been so long, I stopped working on this project for awhile.
My 2 way clutch works fine during testing but it was a nightmare getting it to work under load.
Obviously 3d printed parts would not stand much force, so I had a prototype made in mild steel and it was very hard to get it working like the printed parts. One of the biggest issues is that to accomodate my fabricator, I had to modify the lead screw in the mechanism.
I stopped working on it at this point. Next step would be switching some parts to brass/copper, and getting that lead screw machined accurately

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Vanarian   10 kW

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Re: AT-One electric inline skates (quick update April 2018)

Post by Vanarian » Mar 05 2019 1:26pm

Dogu-ya wrote:
Man I hope you'll be able to work again on it! Having a workable version already is big step in the good direction.

How much did the clutch weight in steel btw?

Me I'm taking it easy on mines for now, training analog (reached 30mph DH this weekend) to be able to control them when it's out.

I'd like to try them against different types of setups to see what's good and not so good motor wise (DD/planetary gear drive/bigger stator/Regular PU Tyre/special grip one). That's considering I'll kick push / stride too, I was surprised at how much acceleration a human can pack in his muscles!
-+AT-One project : electric inline skates - no remote, hub motors, one frame for various wheel sizes & quasi-universal boot mount

Rollo Ergo Sum!

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