Don’t want to use my brain nor does it want to be used right now.
What motors are we using for 16s-20s builds? Do many of our main motors get fucked over 12s? Can typical Maytech 6355’s be used 16s?
Thank you folks, that makes a bit more sense of my confusingly vague googling. The bit that trips me up is I was under the impression that green was always retaining compounds (not true apparently) and also that retaining compounds are different in nature than thread lockers (still a bit fuzzy there). I also saw very conflicting advice on green in threadlocker being for wicking lockers, which is true of Brian’s 290 but I’m mostly sure isn’t true of 270. Part of the reason the vagueness is annoying is that for 290 most material specifies low viscosity but when it’s not specified for 270 it’s hard to tell if that’s medium or low or high
The specific use I bought it for is for affixing axles to BN220 hangers so it doesn’t matter if I can never get them out again (I think) but in general I’d like to have useful stuff around. Only problem is I ran into an old friend on the way home who has a machine shop right next to my house, the bastard has excess boxes of 263 apparently
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I thought my motor bearings needed oil - odd since they’re brand new.
Turns out the “whirring” noise is the motor c clip making contact with the boardnamics xl mount plate.
I see 3 options
- File down c clip (making it super difficult to service motor in future)
- Washers between motor and mount plate (eww)
- Dremel out a bit of the inside surface of xl mount plate.
I’m leaning toward the dremel option but I need some second opinions.
i would use washer to space it out, but im the lazy type 
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File the mount away where the circlip touches it
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Thanks Brian. It’s such a small amount of aluminum to remove, it will be a quick job with a dremel.
I recommend a cutting tool like a carbide burr, or a disposable abrasive like a sanding drum, rather than a mounted stone for grinding aluminum. The soft aluminum has a nasty tendency to gum up the spaces between abrasive particles on stones, and cause them to clog up, overheat, and in some extreme cases, crack and explode under the stress of high speed.
Not too big of a deal for a ten-gram dremel stone, but I’ve heard stories of that happening to bench grinders too.
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anyone know the biggest wheel pulley dkp with evolve mounts can handle? I want to run 8 inch wheels on 15 inch dkp and am worried the 72t pulley will be to big and hit the motor pulley or cause skipping.
Are there extended mounts for bigger pulleys? or mounts with idlers?
Thanks!
Yeah, dremel’s carbide bits are definitely the way to go. I’ve had the same experience with their so called “grinding wheels”…
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TBF aluminum will have that effect on most grinding wheels or cutting disks. You need to get specialized wheels for aluminum and other nonferrous metals.
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I use the carbide burrs for nickel removal and its great, they don’t even wear out at all
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Are the Xenith settings per side or universal? Battery amps mainly.
in vesctool, per side
in unity / xenith UI app, total
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Thanks. 
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Good to know I’m not the only one. Your router job looks super clean. nicely done Al
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I feel like @Boardnamics could help us out on future revisions of this product
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Might not be phrased very well (or qualify as a noob question) but I’m trying to find resources on estimating state of charge based on resting, open-circuit voltage. Discharge curves for most models of cells are relatively easy to find (thank you Mooch), and in most cases at clearly stated and varying rates of discharge. But unless I’m very much misunderstanding these are graphs of the voltages under load, while being discharged, right?
Most resources I can find on estimating state of charge make a point of saying you should measure resting OCV but then don’t give an OCV curve, and those seem much harder to find. This is why I think I’m mis-phrasing something because google doesn’t know what to show me. To be fair I did find one paper with a data table relating SoC to OCV, and it does happen to use the same cell I’m interested in (30Q) but it’s not very well written and doesn’t specify what it means by OCV in terms of resting or recovery time, it just says no current flowing. Doesn’t inspire confidence in the rigor of the methodology. Summary of question: how do you relate SoC to OCV in general, and particularly is there an easy way of relating a discharge curve to a resting OCV
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Only if the discharge current level is at a very low level. That way there is very little voltage sag and so the resting voltage is close to the voltage-under-load.
A couple of research papers I’ve read mention a discharge rate of C/50 or C/25 if accuracy isn’t as important. This means take the capacity in Ah and divide it by 50 or 25 and use that as the max current level.
For example…the Molicel P42A is a 4Ah cell so for decent accuracy the discharge current should be no higher than 4Ah / 50 = 0.08Ah, converted to current = 0.08Α.
It’s hard to find discharge tests being done this slowly though, 50 hours is a frakkin’ long time for one discharge. 
But if you can find a 0.5A test you can get a rough idea of the SOC vs Voltage numbers.
A higher discharge current level, 1A for example, could be used but accuracy drops as the current level goes up. Not just due to the voltage sag. Even a bit of cell heating affects the internal resistance, causing it to vary during the discharge and affecting the results.
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Here’s something for the 30Q:
And a general one on sources for cell data:
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