My in-da-hub motor mount attempt

[LEVer]

...here's more perusing:

http://www.etotheipiplusone.net/?page_id=1663
http://www.instructables.com/id/Make-Your-Own-Miniature-Electric-Hub-Motor/

 

[Hummina Shadeeba]

hey diggler, as you said, that's the plan. stator is stuck on axle and rotor bolted to aluminum piece I made which floats on axle with bearings and that sits in wheel.
it's getting better.

 

[Hummina Shadeeba]

Going!
Smashed the HK cheapy controller already avoiding landing on my head.

Brakes suck as the hobby wing 150 is programmed out-of-the-box. An then I think because the battery started to die it started to slam on brakes and it would send me. Strong brakes then. Another problem is The throttle would stop working and the esc would make noise which would only stop when the board stopped and i had action with my trigger. It would make this noise which was some intended beep. Some tone. And it would continue till It rolled to a stop. If I pushed the board again with my foot it would make the noise till it stopped again

Waiting for my batteries to charge
Just 4s now
Ill have to get the nun chuck set up now
Ill fix the video sometime sorry. Ill get it up quickly.

 

[Hummina Shadeeba]

Sorry the videos won't work. Ill post it when I figure it out

 

[psychotiller]

If you load them to youtube first they link up well.

 

[LEVer]

Here, I did it for you.

[youtube]NYZ-DPvPexU[/youtube]

[youtube]ejSY6aKMdzM[/youtube]

 

[torqueboards]

Humminna! SUCCESS! lol Congrats about time! I'll have to check that out next time. You must sleep at the tech shop now.

Funny.... I thought that was pediglide's video. I immediately knew it was SF and was like huh Pediglide is in LA?

Nice job! Looks great. The stalling on the yellow sidewalk bumps. It seems you don't have enough torque. You should run 4x motors on those hub motor boards. I would assume since it lacks the torque over the bumps. Maybe move to 90mm that way your not so close to the floor? 4x motors would be pretty awesome.

Looks pretty good though when you accelerated on flat ground.

Can't wait to see more.

 

[makepeace]

4 of these converted to wye 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.

 

[Hummina Shadeeba]

the motor was strong at first just before this video. it's not the yellow bumps that sent me over it was something electrical. somethings wrong and sent me off the front throwing my transmitter. And torque dropped soon. batteries were at 3.6 when I checked them after. motor did get warm quickly but I wanted to believe it was the board rubbing the motor but I tightened the trucks down and figured it would be ok but it wasnt. dumb to mess with but now i know it can handle some rubbing and the can and board have some lasting rub marks. wanted to fit the 44 caliper dropped but it's too low...but I can slightly shape the board and it'll work.
cant get the nunchuck to go and I heard it should connect easily, any suggestions?

 

[dirkdiggler]

Nice, good job on that board. Are you saying the LVC was what sent you? If the batteries were at 3.6v and you had some sag, that would shut down the esc.

 

[psychotiller]

Nice, good job on that board. Are you saying the LVC was what sent you? If the batteries were at 3.6v and you had some sag, that would shut down the esc.

That still shouldn't happen if the ESC has a "forward only with brake setting" unless you cant disable the drag brake.

 

[beto_pty]

so that is what Hummina looks like....

Very nice video and very nice setup
Congratulations.

I experienced the same with my 150.. just change the timing to high and it will go away.. if not it will throuw you off the board as it will appear randomly at high speeds (ask me how I know) .. stragely only happens with the tacons though... not the 5060.

Awesome vid

So is this the next step? will we look back at this post as the biggining of the end of the motormount... if tacon can produce a motor with half the Kv as the current one the answer might be yes...

 

[Hummina Shadeeba]

Hey thanks. Ill change the timing as soon as I get another receiver n transmillter going. But I lasted maybe 7 minutes and the more got pretty warm. And I'm still stuck on the low kv idea and people are tellin me I do t know what I'm talking about. The motor size determines torque at some point more than kv so...we will see
Goofy video but its all I had before the transmillter launch.

 

[beto_pty]

I lasted maybe 7 minutes and the more got pretty warm. And I'm still stuck on the low kv idea and people are tellin me I do t know what I'm talking about.

actually in your setup it does...
only for your setup though.. as you are rotating the wheel at the motor's Kv, but the translational variable is the perimeter of the wheel...
it does not apply to a friction drive where the rotation and the diameter of the motor are the only two variables.

So there...you want to hear it...?

do you...?

wait for it...?

you were right and we were all wrong...however in our defense you suck at expaining...

The not soo good news might be that the heated motor might mean you are overtorquing the tacon by quite a bit as compared to our geared boards... easily solved with a a second motor though...also the noise is just the hk150.. it makes super loud squeaking noises while braking, much more so than any of the others

 

[Hummina Shadeeba]

I lasted maybe 7 minutes and the more got pretty warm. And I'm still stuck on the low kv idea and people are tellin me I do t know what I'm talking about.

actually in your setup it does...
only for your setup though.. as you are rotating the wheel at the motor's Kv, but the translational variable is the perimeter of the wheel... I dont know what you mean by translational variable but I understand the wheel size is a huge factor with this being in-line.
it does not apply to a friction drive where the rotation and the diameter of the motor are the only two variables. I don't know what you mean by the other variable, the only one I can think of is the motor diameter and the wheel size doesn't matter..but you taught me that so you must mean something else

So there...you want to hear it...?

do you...?

wait for it...?

you were right and we were all wrong...however in our defense you suck at expaining... who are the we and wrong about what?! I was contesting was the distance of PT's motor revolutions to ground covered. Which I still think is pretty interesting. If you agree that he has like a 30:40 gearing comparatively than we agree on that. But if we're talking about the kv of a motor and if this can be tuned to produce a mechanical gear and keep us in optimum power, torque, and efficiency...I'm waiting for someone to tell me what the hell kv means and you're the first to tell me I'm right.
but in my looking for this graph I found I got a response for the experts over there at rcgroups and just glancing I can see it looks long winded...if you have a simple answer..?

The not soo good news might be that the heated motor might mean you are overtorquing the tacon by quite a bit as compared to our geared boards... easily solved with a a second motor though...also the noise is just the hk150.. it makes super loud squeaking noises while braking, much more so than any of the others

great looking motors though. and well touted. I was on 4s so maybe it'd be cooler on 8 with the alien but there I'm showing my confusion about kv .

 

[beto_pty]

Kv is just rpms per volt... but I assume you already knew that...just in case you didnt..
4s at 245 Kv gives us a max rpm of 4 cells x 3.7 volt/cell x 245 rpm/volt = (cancel out cells, and volts) 3626 rpms...

Also 4s really taxes the motors (at 16:40 gearing) with 9.8mm abecs... the gargoyle runs on 4s and it huffs and puffs, the exact same gearing at 6s and it breezes through overheads and small inclines without breaking a sweat.. you on the other and are pulling 1:1 gearing on what I presume are 98mm abecs as well...
Also easy on that trigger if you are planning on using 8s. believe me...you will die!

Also you cannot get everything at once.. efficiency, maximum torque, and max speed are all at different points in the graph.. also this graph is for a tiny 7 amp motor from what i gather... however torque does increase as we max out the amps.. and efficiency is best midway of the range, dont know if this is for all motors or just little ones...this seems like a graph for a 126 watt motor..not your 2400 or so tacon...

 

[Hummina Shadeeba]

Got the.chuck.going and the.motor going as well. The motor got really hot quickly. I think it rubs. Im done with it. Looks cool though. I imagine the tacon 160 shouldnt get untouchably hot in a short time like it did w a bit of hills.

The chuck....I flipped the dongle or whatever its call over ..du

 

[beto_pty]

rode my tacon for an hour and a half.. max speed most of the time...
got warm.. but i could keep my hand on them without burning..

your 1:1 vs my 1:2.1 equivalent gear ratio(assuming we use the same wheels) is probably to blame...