Endless Sphere

Correct there AW, 26" wheel at 2000rpm is 240km/h or 150mph!

Didn't think of that

-Test unloaded speed of wheel at full throttle (noload rpm) and at what voltage you measured it. -Divide it to rpm/volt which is called voltage constant: kV From this calculate torque constant kt: image.jpeg Next check max current: Imax of the controller Max system torque Tmax is kt*Imax Torque Tx a...

seriously, that snow riding!
How old are you
any sane person would've quit after the second crash.

That was a surprise! Did you ask both for sensored/sensorless? I really thought it would be higher.

Vasilis original thread name for the nucular is 100kerpm controller I think he even posted a video driving some high erpms.

Post the results when you try

I tried a molten NaOH salt bath on my phase wires with enamel that wouldn't come off. Cheap, effective but dangerous. One minute in the bath stripped wires totally clean and shiny

Outside, gloves, eye protection, "disposable" clothes and no fumes breathing.

Just saw this.. Check out nucular controller here on ES. It should do 100kerpm and users seem happy.

Isn't nucular controller up to 100kerpm.. yep! The 12fet should be a pretty good match.

What is fault code when you throttle, what type of throttle have you got, hall or potentiometer?

Did you set the temp protection acc to section 2.7 in the manual? What does this setting look like now? I think overheat might not be an actual issue since controller status message is fault code "0001000 idle" and not overtemp. I've had this message without any issues in the driving of the controll...

APL wrote: ↑

Feb 12 2019 2:11pm

Well, yea, sure,..I did look it up. but most of it is overseas. thought maybe you had a US source already.

sorry for the pun, it's only that i am in sweden.. only time i buy from the US is when i really must since the air freight and taxes are huge..

http://www.giyf.com

"Rectangular magnet wire"

Wire is made in square and rectangular shape. I've wound with rectangular 2.5x1.25mm, it was stiff but still ok to work with. I got close to 65% fill if i remember correctly which is at the top end of the winding scale. The parallell wire winds get crossed and lose fill so easily, they are only bett...

You know, there's never any "need" for backiron. You can always use more magnet material or copper wire :D It's that it's an effective and cheap way of getting high field strength. Backiron together with halbach is also good for the field strength, off course you need less magnets in this case. Madi...

OK, understood

I'll write a complete "this is what i'd get for a 700usd conversion" list this evening. But a question: is the 400USD bike included in the 700 so you only get 300 usd for parts? That's about impossible..

Yah, everyone can think for themselves? It's just to provide info on the available choices. You take it too seriously, it's not an order list we're writing, he'll have to do the thinking and full calculation :D Never mind the battery pack, it is what i first used myself. There are several bottle/dol...

Am i missing something? is the bike cost included in 700USD max? Otherwise it doesn't look too hard, depending on if customs get you with the tax: Skärmavbild 2019-02-10 kl. 23.17.16.png and as i stated before, skip the brake sensors, they are too poor quality to use or pay for motomech is right tha...

You're missing the effect of the backiron to increase the magnetic field strength in the air gap.

As stated above: roughly 2x magnet material needed for same field even though you have a Halbach array.

Without the halbach it's even less field strength than that..

nomidis wrote: ↑

Feb 10 2019 11:40am

Sorry, my mistake, I updated now, I meant 2 rides/week..

let's say a q128 lasts about the same in greece, then you'd be able to use the kit for 2x per week/50wks per year/15km for nearly 7 years. by that time you'd wished you'd bought a mac

Yes! Not a problem in greece, i'd guess

Daily and weekly are different things. My q128 was ok for 10000km before it gave up due to bearing failure and rust, not bad for the low cost and to do a tryout of ebiking but today i wouldn't buy it since it was a bit stressed on the steeper uphills.

Adapttos.. Forget them. I have two on the scrap heap. And so does everyone else that bought one it seems.

I'd recommend the mac motor since they have a solid reputation here. I've been commuting myself on q-128 and it's ok but you soon realise that the cost difference per ride if you commute makes it totally worth it to buy the best quality parts.. If you can afford it at all. You don't need brake senso...

My bike is still broken so no trials done yet..

I will soon start a new thread on the battery build

I'd say both are good enough, high temp resistance glues with strength. DP420 seems superior based on the datasheet. If you don't already have a dispenser gun then I'd still say the 331 is the best since it is single component and you have zero risk for issues caused in the mixing of base and harden...