Archived: the OG noob question thread! 😀

do you know the max width i can use on a 21700 battery? a bit smaller than the positive terminal

What’s the best way to adhere everything to a deck\ enclosure? Do you prefer Velcro or tape? Links are appreciated

screws/bolts

I think he means battery/vesc(s)/receiver. For which 3M Dual lock is kind of amazing.

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possibly fixed the issue. I changed the Motor pulley again to a new one and currently test it out, so far no weird sounds from it.

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How do i know when my motors switch from sensored to sensorless?

At roughly 35km/h i feel a small jolt like shifting gears with forward momentum. I want to know if the jolt is caused by switching to sensorless or if it’s the 2 shunt design of the vesc 4.12

how do i know if i reached 200/2500erpm

2000ERPM is around 4kmh, the transition is almost unnoticeable. Jolt is throttle interpolation but you can make it smoother changing the throttle curves.

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thats what i have set

the acceleration is smooth from 0-100 except that one point where its like i activated a tiny turbo. If i passed that spot its smooth again.

edit : it happens at around 55-60% duty cycle

I normally mess with the graph with the exponential line on the PC VESC tool, no idea how you’d change that on metr.

My throttle curve looks like this. (found a random graph on google that looks similar) Mine isn’t as aggressive as the picture. And yes the orientation is correct, i flipped the image on purpose so it looks like mine

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My trick is to taper the last 75% so that it’s a very gradual increase and so when the 2 shunt limitation kicks in it’s a little bit less aggressive of a change. But you already have that so I don’t know why its messing with you.

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When I’m back home from my ride i can show you my actual stuff. Maybe that helps

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Can’t hurt

What’s the exact size allen key needed for motor shaft grub screws? I got the smallest in metric which i think is 0.8 that’s too small, and smallest imperial, too big -.-

it can differ from pulley to pulley so you have to try a few.

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i use 2.5mm and 3mm hex keys.

2.5mm for the integrated ones and 3mm for the external ones.

2.5 top
3 bottom


No way that’s the right size for me

looks like 1.5 or 2

do you have calipers?

Unfortunately no. And i’m at the point where i already went too over budget to get one-use tools

Non- digital calipers are cheap

You’re looking for 2mm