Noob question thread! 2020_Summer

ah i literally just finished resoldering it
I mean it works now so yay, but I’ll experiment swapping those anyways

2 Likes

Anyone here have any experience with peltiers?
I’m trying to make a small cool box to fit like 4x 2L bottles and slowly cool down.
All easy so far, but peltiers last time i checked are some hungry beasts that run so hot and inefficient it hurts just thinking about it.
Then there’s the power source… where do i even go for that? It’s not like they run off usb 2.0…

1 Like

I think the energy might be better used riding to a store to buy some ice. Jk

You would probably just make like a 3S pack.
Seems like an expensive project but whatevs.

1 Like

Was hoping to make it mains powered. All i know is peltiers must be current limited.

My main goal is dead silent cooler in my bedroom, whatever it takes.

I can find a fridge for £30 off fb marketplace but when that compressor starts at 3am… gh

Edit: energy wise, it’s definetly more efficient to visit the nearest supermarket (7km each way) and come back with ice on my electric board lol

2 Likes

Dont know if you already aswered the following but here it goes.
Hubs or belts?
If belts are they both a the exact same tension and if so are your motors starting in the exact same orientation? FOC or BLDC.

Unequal belt tension can cause more rolling resistance in one wheel than the other hence the startup delay.
Motor position can also cause some stuttering/startup delay for one vs the other simply by where they are positioned.
Multiple things can cause both motors to not startup exactly at the same very instant.
A short video would greatly help diagnose.

1 Like

If they are running sensored FOC try disconnecting sensor wires and running bldc. Might be a sensor that craps out intermittently. Might also be some wierd stuff going on with your unity. Might be worth to ask in the Unity known problems thread if you haven’t found similar issues there.
From this brief 4s video what I’m seeing is a motor loosing synch intermittently, might be worth to check if all connections are ok and nothing is loose phase wire wise. Sometimes the simplest things can prove to be the solution (eventhough in esk8 its rarely the case) :sweat_smile: . Hope you find your issue and get back on the road! cheers!

It makes me smile when i see n00bs helping n00bs…

But as a n00b…should i trust another n00b, to give me non-n00b advice?

1 Like

Depends on the n00b.

4 Likes

images (45)

5 Likes

Theyre both advertised as 290mm, both motor mounts run parallel to eachother, so mounted the same way. BUT one belt is pretty loose and the other one tight as it should be… dont know what to do about it… they are different manufacturers though, maybe i should get the exact sam ebelt twice… but its weird that theyre both 5M 290mm and so different in tightness…

Theyre positionned the same way, exactly next to eachother, just like if i had cross plate.

Ill provide a video when im back home! Thanks!!!

Did you try what i told you with flipping the belt 180°? That fixed it for me.

2 Likes

Like flip inside side to outside side? Yeah i did that :confused:

yes, if your belt is like this:

you turn it around to this

2 Likes

Did so… :confused: A said, theyre different companies… but same length
i hope you understand that i want the motors right next to eachother, because of aestethcics?

I know its not a good thing to use a hoverboard battery in an esk8… my real battery is on the way guys - is it normal, that with 80% capacity left, i only get like 30-35 kmh while i hit 45kmh before easily? it seems that my top speed is only achievable in the first few minutes, but with 10S at 36V i should not be going that slow… right? Feel free to ask things as this explanation is very poor i think…

is it just the <4400mAh battery * 15A max discharge?

That is both what i had in mind and terrible at the same time. Aaand usb power…
Heatsink on the side and door on the top, some decent power source and it’s golden

1 Like

My 12s3p 30q pack drops as low as ~40% from 85% if drawing 56 amps from it.
Your hoverboard pack will sag waaay more under load, bringing your voltage cleanly into discharged battery territory as long as you keep that throttle

2 Likes

through your laptop and no real psu… ooof that gives me anxiety too

You make me feel like i need this too*-*

1 Like

Sorry, total noob question: So when under heavy load, the battery drops down in voltage and goes up again, after releasing the load, like a dolphin in the water?

1 Like