Beginner Question Thread! 2023 Edition

No, more like this

Except different, and only one of those jumpers, and it’s attached at one end, and can’t be removed. And probably dyed black instead of vomit beige.

And not one of those horrible enclosures pictured here.

Y’all got a preferred brand of closed cell neoprene foam? Or any other recs for gasket material? I got about a 5mm gap that needs filling, I think adhesive backed would be preferred and I can leave it on the deck

How do I maintain hub motors for maximum lifespan?

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Don’t ride in the rain, done.

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You could have two loop key receptacles, one for each battery. Only carry one loop key, and that way, you can only power off one battery at a time, and it only takes a couple seconds to switch.

That way, they’re in parallel and only one can be connected at a time.

Edit: looks like you have a path forward already

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3 char

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If you ride in bad conditions, open them up and see if they need cleaning. It is easier to clean off a light layer of rust vs letting it get so rusty it almost won’t come apart. You can also clean out the bearings and add new grease but that would be maintenance done after a lot of use or after a year of use.

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I layer 3mm EVA foam. It squishes down to basically nothing under enough pressure, so I tend to overfill the gap and let the bolts squish it nice and snug. Works very well for me.

I hate sticking anything like that to the deck though. I always stick it onto the enclosure flange. Depending on your enclosure that might not be an option, like some of the eboosted enclosures don’t really have a substantial flange at the ends so i’d reluctantly stick to the deck in that situation.

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I’m working with my first set of gears atm. In the process of arbor pressing out jbwelded pinions from a motor shaft, I mared the bottom face of the pinion.

I removed the marks and then did a few passes with a green pad. All that’s shiney is not gold.

These are steel mod 2 spur pinions from an unridden @moon drive set. How do I get back to black?

Does the black oxide finish matter if well lubed in the spec’d motul grease?

If finish does matter, will a hot dip in oil be worth the heat changes to the pinion? (It was already cooked with a hand butane torch to loosen jbweld)

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you could use “cold blue” to get a similar effect.
I don’t have any experience with moon’s stuff, but as long as the drives are reasonably sealed, IMO you probably don’t need to go to the trouble.

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@Cyanoacrylate Thanks for chiming in.

GREEN LOCTITE, ASSEMBLE!

image

@b264

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If I wanted to run 4wd would it be fine on a 4p battery, or should I really consider more cells per p group?

normally yes, u have more weight as a whole, u have more rolling resistance also, ur average Wh/km is gonna go up even on the same route with same riding style. so u probably should have more than 4p

besides, more p = less heat per cell = less degrade, so its a good thing unless u overkill it like @Takachi14 making 20p

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At 2A battery current per motor with SPIM08HP cells, it would be totally fine. Overkill, in fact.

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32p excuse u XD

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ur single pgroup is gonna beat my whole board very soon in Wh

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But unless ur making a low range 4wd setup u want it to be at least 8p or higher and also preferably two individual packs because again more amps draw= more workload om the pack which will also entail more heat build up. Which is something you dont want. Dividing battery workload is imperative to maintain cool tempertures considering unlike ev cars and motos we as pev riders dont have any active cooling built around our packs. So if u either ride for a long time or pull way to much amps then wat u need to be pulling from ur pack u can build up heat very fast with no real way of dissipating it quickly. Especially on a 4wd setup.

Haha possibly

So halve the pack? Like say 2 12s3p packs? Wouldn’t that lower the amount of amps I could draw?

No it wouldnt, for example lets say u want to pull 160a for ur 4wd setup right,40a per can if u have two 3p packs rather then a 6p u will be pulling 26.67a per cell on a 3p pulling 80a total battery current limit per pack rather then doing the same thing out of a single 6p. Lowering ur packs sustain voltage sag under load since realistically u wanna have a amp differental for 4wd ie have more amps in rear then front. So really the bat amp setup should be 50a rear 30a front. Using high discharge cells like p42a or 40ts

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