Archived: the OG noob question thread! 😀

[ZachTetra]

That’s assuming 90mm wheels?

[b264]

10S on 15/40 with 107mm or 110mm wheels moves my fat 210 lb ass around town just fine. With one motor.

[pookybear]

I think this is what I’m in need of, not sure which version so I’ll try all - however, files aren’t loading for me on the site. Just stuck in a loop of nothing

I will reupload later when I get home. I think I’m just gonna load everything up in my Google drive.

[pookybear]

@b264

Do you have the link on how to quickly check the motors by shorting the phase wires? I cant seem to locate it from here or on builders.

My ninja search skillz aren’t working. Thanks

[ZachTetra]

But that’s only a measly 23 mph top speed…where’s the fun in that?

[b264]

How to hand-test a BLDC motor

Sometimes if you’re buying used, or troubleshooting, and need a quick way to see if anything might be wrong, you can test a BLDC motor with only your hands. It’s not the most accurate test in the world, but catches most problems. [f5c1e17e62e9f244432bf763be93746978c88931%20(copy)] Verify the motor spins without grinding or rubbing. Put a tad of sideways stress on the shaft and push it and pull it (while turning) to verify it feels smooth. connect phase A to phase B and verify by hand-spinni…

[b264]

Anyone remember who had the mountainboard question where one side would randomly spin backwards? It was in the last few days I think

[b264]

Mine go a lot faster than 23mph (37km/h), and that’s on 170Kv

[ZachTetra]

24 at full battery I guess

[b264]

More like 26.6mph (42.8km/h) loaded and 29.6mph (47.6km/h) on the bench

If you click on the calulator at the top, it’s actually the default setting

170Kv 10S, 110mm 15/40

[ZachTetra]

Wait I had the AT efficiency plugged in, I’m dumb and blind

[bourbon_norm]

Battery regen is high speed brakes so start low and see what you like.

Can you expand on that? Are you saying that adjusting the battery regen voltage will affect braking at high speed more than at low speed? I haven’t got that straight in my head yet. Which charging and amperage limits translate to the mechanical “am I going to face plant” part of braking.

[b264]

Adjusting the “battery min” voltage current will affect braking at high speed more than at low speed. Adjusting the “motor min” current will affect low-speed braking more than high speed.

[bourbon_norm]

Thanks for the clear answer and the correction on voltage. I got it right once and wrong once. I’m a mechanical guy at heart. I tell people after 25 years of working with antennas I have learned how to spell RF.

[Sn4Pz]

On Mouser I see that XLR connectors only support up to 50v, would that make them a poor candidate for charging my 12s7p 30q board? What do you guys use for charging 12s boards?

[Flasher]

@Sn4Pz
You could go xlr if you take the right one.
http://www.switchcraft.com/Documents/switchcraft_sealed_xlr_npb_604.pdf
It has a vrms of 125
I personally just went xt90 with 10 awg cus I like going overkill

[Sn4Pz]

I can’t go xt90 as that’s going to be my loopkey, and barrel connectors won’t be able to handle 8a+

Not exactly sure how vrms works… I’ll keep searching

[Flasher]

Go xt90 for loopkey and xt60 for charging? They even have a mountable version

[Flasher]

12s6p 30q pack. 4a charger in the mail. Might want another one for on the go. What is the biggest i can go in amps to charge it faster without ruining my pack?

[ZachTetra]

Technically you can charge at 2 C, or 24A with that pack, but I wouldn’t go that high unless absolutely necessary. 12A would be okay