Boardnamics M1 Gear Drive + Other News

Oh it’s finished but on the far side of the pond?

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Ah, I can’t wait to get my kit and finally finish building my board. Dual M1 Straight Cut Drives, 220mm Hangars, Adjustable Baseplates, 170kv 6384’s, 12S4P Molicel P42A, Stormcore 60D, and on an Evo 40 deck.

Going to be a thane torque machine. :sunglasses:

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Oh boy. I think I am going to be adding to my current order!

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With the recent news that @Boardnamics will offer 140kv bh 6384 fs motors, I am reconsidering my build. Do you think it is okay to run the 140kv motor at 16s? I heard that lower kv motors are better for running higher voltage like 16s as opposed to 12s. These motors are made for 13s max right? If it is known that I will be noticably shorting the life of the motor or hurting it then I won’t. I already have a 16s capable bms and esc. I got some advice for my build about this but I feel like you might know more because you’re selling the motor.

"Limiting RPM is easy in vesc tool. Say you have a 170kv motor and don’t want to spin it at more than 50V. ERPM = motor pole pairs * RPM = (motor poles / 2) * kv * voltage = 7 * 170 * 50 = 59500

So just set that in vesc tool for each ESC, and save:

As for voltage spikes, I don’t think motors experience that. And if you have a conservative setting like this, no voltage spike is going to kill your motor anyway.

And if your motors do die (which they eventually will regardless I think), wouldn’t it be great to already have your board set up for 16s so that you have more motor choices to choose from? :smiley: "

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I see no reason as to why 140kv cannot be run at 16s. If 190kv can do 12s, then 140kv at 16s is actually less erpm. I think Flipsky just tells people to run less voltage to reduce customer damage rates because 16s on a 190kv motor would certainly not be ideal. It would have the tendency to pull too much current

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Please do not limit erpm here. You will loose brakes when outside of that erpm window. Leave those set at your hardware default.

Do it instead by limiting duty cycle. Lower “Maximum Duty Cycle” from the default 95% to whatever you want it to be — and then make “Duty Cycle Current Limit Start” 5% lower than whatever you set “Maximum Duty Cycle” to. This will limit your top speed without turning off your brakes.

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This is why there needs to be really good instructions baked into the VESC tool somehow…

idk maybe in VESC tool ver 7

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What about we compile all the threads and make a tutorial for the betterment of all skate kind. It’s not like its not already here…its just spread out. I’ve been learning in bits and peices but reading noob questions is the best way i think to gather confidence to program a vesc and not start blowing magic smoke.

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Bruh, there is enough material on how to use VESC that it could fill up an entire university course :rofl:

Seriously, the more you know, the more that you find out you don’t actually know…

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I just want a brief description of the duty current limit start issue.

I haven’t made any special changes to settings on my boards for it, but don’t know if I need to.

TLDR please?

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ON AN ESK8, make sure “Duty Cycle Current Limit Start” is 5% to 10% lower than “Maximum Duty Cycle” (which is usually 95%).

On a Funwheel or balance vehicle, you want it set to 100%

On an ebike or whatever, it doesn’t matter much

A good combo for esk8 is 90%, 95%

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Perfect. Will check :ok_hand:

What are the default values? And why are they not good?

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Depends what software you use and what version. At this point, you should probably always set them.

Doesn’t it have to do with faceplanting when going really fucking fast…like when you dont expect it doing 40mph

The bad defaults were (are?) 95% “Max Duty cycle” and 100% “Duty cycle current limit start.”

The reason that’s bad is because when you make it to 95% duty cycle, the power/acceleration you are feeling doesnt slowly fade out, it just turns off like a light switch.

This sudden loss of power is often enough to throw you off an esk8 (especially if you are leaning into a hard acceleration, for example).

When you set “Duty cycle current limit start” to 85%, then you start gradually losing power the after 85%, so by the time you make it to the 95% Max Duty cycle, you have gradually stopped accelerating and your board doesnt stop accelerating like a lightswitch.

This isnt really the thread for this though.

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running higher voltage is better for the motors because you push less amps. i am running 18s on my flipsky bh 6374s with out any special settings. i ran motor detect, it set them for about 50 amps per i think, i left it that way. 400 miles later, they still run cool and spin nice. never thrown a fault. stormcore 100D. we just did a group buy of bh 6384s and i will be running 16s or 18s on mine, a few in our group are going high voltage as well

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Fuck ya it’s going to be crazy busy for you hope you got help wish I lived in (The best city in Cali) SD still :cry:
I’d volunteer :call_me_hand:
Where’s the HYPEMAN @KaramQ I miss you Bro

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What wheel adapter options will be available for the AT drives?

MBS
Trampa
Bergmeister

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