Archived: the OG noob question thread! 😀

xsynatic · February 19, 2020, 12:33pm

Good point. Forgot about that ^^

wafflejock · February 19, 2020, 2:33pm

Yah for me it’s depends on build for the same reason, but yah if using individual bullets definitely easy and fast enough to do the physical swap to be worth it unless you are going for really tidy build with exact wire lengths for each phase.

Doing the phase wire change means less things to remember are strange if/when I I have to setup another vesc, also sometimes not as easy to access the USB port when things are stuck down.

Sn4Pz · February 19, 2020, 3:28pm

Ill forever swap phase wires. On my Spuderoo I had set the ‘reverse via vesc tool’ but one day they just decided to switch back 0 rhyme or reason.

Thats when the board became FWD, but Ill never do that again.

ahrav · February 19, 2020, 4:21pm

Not sure if this goes in this thread or the metr thread since it’s kinda related to both. Is the max motor current on the app a combination of all the motors. (AWD in this case or just two). For reference. https://metr.at/r/9OzWp

Geo_Engineering_FTW · February 19, 2020, 4:50pm

im ready to cop the motors for my first build. i’ll be using caliber II trucks for a street build and am torn between dual 6355 Maytechs vs Torqueboards (sealed and sensored). the frequency with which Maytechs are praised here seems to outweigh TB’s, but someone commented that dual 6355 Maytechs won’t fit/won’t fit easily on Calliber II’s bc of this nodule on the side, or something. 1. are these 2 brands my only options with this price range 2. which are better (more reliable) 3. I live in the U.K (any advice relating to buying motors to be shipped here wd be appreciated.)
(4. should i scrap dual 55’s and hop on that 6396 GB and make a single motor build…im lightish - 11 stone/154 lbs/ 70kg). sorry derailed my question there. i know this is down to me, but im still a bit torn. priorities for build in order 1. torque 2. torque 3. looks cool

Jordicious · February 19, 2020, 4:53pm

My torqueboards 6355s fit just barely on cal 2s… The torque is so good it bucked my friend right off when he tried it.

stan · February 19, 2020, 4:54pm

How to check your motor’s kv using the vesc tool?
I have some motors with no specs, so I would like to find this one please.

Geo_Engineering_FTW · February 19, 2020, 4:55pm

damn. should i be concerned about using the 55’s on my first build, will i struggle to assemble it with no prior experience?

Jordicious · February 19, 2020, 4:57pm

There’s a formula based on the flux linkage… I’ll add it when I find it.
eDiT: lambda=60/(sqrt(3) * pi * n * kv)
Where n is your motor’s pole count (usually 14).
Rearranged to solve for kv…
kv = 60/(sqrt(3) * pi * n * lambda)

Nahhhh… They’re not too tricky at all. What drive system are you using?

stan · February 19, 2020, 5:02pm

So it’s 60/ ? * 3.14 * 14 =kv?
also what is sqrt(3)?
What is lambda :D?

Jordicious · February 19, 2020, 5:05pm

sqrt(3) is the square root of 3. Lambda is the flux linkage (λ).
The formula arranged to solve for kv with would be:
kv = 60 / (76.179 * λ)

That’s assuming your motor has 14 poles. Count the magnets in the rotor to make sure

stan · February 19, 2020, 5:09pm

It makes it 0.173 so it means it’s 170 kv?

My motor flux linkage is around 4.54 on both motors

Jordicious · February 19, 2020, 5:10pm

Oh yeah forgot to mention flux linkage should be in Wb (webers) while the vesc reports in mWb (milliwebers).
Just multiply by 1000, so yes, your kv is 173.

Geo_Engineering_FTW · February 19, 2020, 5:21pm

belt drive, will probably use dickyho stuff, unless I decide to get the TB grab-bag that includes of all the parts i need thought about gear-drive, but too expensive for first build i think. what system are you using for the 55’ build?

Jordicious · February 19, 2020, 5:22pm

I’m using @Boardnamics mounts with 9mm belts… I just want to make sure you’ll have enough space lol. There’s maybe 3mm between the cans on mine.

Geo_Engineering_FTW · February 19, 2020, 5:25pm

ive not researched anything to do with belts yet. i already have the dickyho mounts tho =p

but did you consider Maytechs instead of TB? is there much of a difference between them?

Jordicious · February 19, 2020, 5:33pm

Maytech should fit as well, same total length…
The TB motors are the ones I have personal experience with so I can’t compare fairly, but I will mention that the tb’s have 15A higher max current, and will probably ship faster given current events.

Edit: how thick are the dicky mounts?

Venom121212 · February 19, 2020, 5:37pm

Swap wires.

If the esc has an issue and reverts back to original settings, they’ll still go the right direction.

Geo_Engineering_FTW · February 19, 2020, 5:41pm

the thin part looks like 6mm, the thick part is 12mm
however, just seen this other build im sort of using as a reference using dickyo, caliber IIs and TB, so i should be good. thanks for your help

Jordicious · February 19, 2020, 5:42pm

No proballo.
Good luck on the build, hope it turns out well!