Noob question thread! 2020_Summer

Could you suggest Focbox 1.6 setting limits?
Ex. not over 80a -80a

Sure — tell us what cells you have and more about the battery.

The battery is THE most important part.

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that pack is most likely no name brand, or at best some 22R cells :joy:, i’ve not seen any taobao pack that uses even 25R(or better) cells unless u ask the seller and pay extra for it.

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anyone know what’s the minimum axle length I would need to install trampa superstar hub? their website said 34.2mm axle required, im assuming it doesn’t include washer and nylock?

They say this pack only 30a discharge every p only 6a

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I was going to buy a set of Metroboard wheels for my 3 links, but they are out of stock.

Can I just use Trampa superstars/megastar with a 28x10x8 bearing ?
I don’t see an option for a 10mm axle in their bearing options.

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High speed braking is battery min. You shouldn’t increase that because your crappy battery won’t handle it.

Low speed braking is motor min. You can increase that if you want.

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Yep, this. It sounds like your battery is the bottleneck in your build right now. If you want more torque or braking force, get a better battery that can handle more current.

If you need the lowest cost solution, then a higher gear ratio will give you more torque and braking force (as long as your belts dont slip) without having to change any settings or stress your battery. However, you will be sacrificing top speed.

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I think top speed was already 20mph / 32.2km/h if I recall. Not a lot of room to go down

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Hey guys, I’m starting a new build with a 12s4p battery and two tb6 vescs. They don’t happen to have a build in switch do they? I think I’m gonna have to buy a external anti spark switch

No, they do not. Not many ESCs do.

Unless you have a good reason not to, I’d suggest you go with the simplest (and cheapest, and most robust) solution: An XT-90S loop key.

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Nope, make a loopkey if you wanna save some money. I’m not sure what reliable antisparks are out there atm. I’ve been out of the game for awhile. I’ve also seen my fair share of antisparks causing accidents mid ride. But I’m taking a chance on a fatboy antispark atm. We’ll see how that turns out.

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Easiest, most reliable, cheapest. Only downside is they are ugly, but even that can be mitigated.

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I’ve got this old one I made, but it still sparks when I plug it in. Don’t worry about hurting my feelings, criticize it all you want! Yea that’s hot glue

It sparks because you’re using an xt90 instead of an xt90s. The one with green on it is an xt90s.

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This is almost always caused by this

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What @RedBaron said. You’re using a regular XT90 connector where you should be using an XT90-S (the green one), and using an XT90-S where you should be using a regular one. (Assuming you had your battery plugged into the bottom one, your ESC in the top, and were using the middle one for your loop key)

And you’ve also got the genders wrong. The green XT90-S female (bottom on in that photo) should be the removable “key” part, not mounted in your board. That way, if the resistor in it (the part that makes it “antispark”) ever gives out, you can just replace the key, rather than tearing into your board’s wiring.

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Ah I see thank you guys!

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Happy to help. Getting that last few percent from “it works but…” to “finished” is always the challenge, at least for me.

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Yep. That last few percent is most of the effort.

10% of the work takes 90% of the time

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