Beginner Question Thread! 2023 Edition

So am I but that method can’t be used for securing the abs lid to the abs enclosure/box thing. No way to access the inside to use the ole bolt and lock nut method

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oh yeah got it. i originally only skimmed the above posts and didnt realize we were talking about an esc box. ig inserts may be a nessecery evil in this case.

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ABS can always be lightly sanded / heavily scratched up. And then 2 layers of fiberglass put on top. Makes super-ABS.

Might be worth getting some heat-set inserts, they’re narrower in cross section (the OD isn’t as much bigger than the ID, and they’re pretty strong, especially the longer ones. The smaller OD would leave more plastic for strength, which might be beneficial.

I’m not sure if I would trust just four to hold and entire box onto a board, but for holding the lid on, they’d be great.

I can’t get an appropriate fiberglass in a reasonable quantity / price, but I’ve got good epoxy and some fiberglass tape that I can add into it for extra strength.

I don’t even have a completely set plan for it yet to be honest. I might not end up using a double lid system

General questions regarding how bms work. Does it only balance the cells while charging? Are there any other advantages with having a bms always connected to your pack if you are bypassing?

Some do, some don’t, some give you the option. All BMS are built differently. Some don’t balance at all. (avoid those)

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Welcome!

It can prevent overcharging of the pack and/or charging when too cold or too hot (if temperature protection is a feature).

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Thanks for the quick reply.

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Thanks! Very helpful.

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Any of y’all got tips and tricks for stopping distance? If I lean back and mash the throttle back the tires lock up and hop about and my stopping distance is still garbage

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What kind of tires are you running?

Bail off the board and let it stop itself and you stop your own body if you need to stop super short with no warning. That’s what I do when traffic abruptly stops and my brakes aren’t strong enough to stop fast enough. It is more for emergency/urgent cases though and not something I do often.

I start breaking before bailing just to be clear since I can’t run at 25 mph for more than like 3 steps

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Well it’s not running anymore, but 8" RWD

I got binding straps on this one, so not much in the room for running, also I crashed into the side of an unexpectedly turning car, so still not much room to run :grin:

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Youve gotta get as much weight as possible as far back as you can, and know how much brake to give it. Too much on the brakes and you’re gonna end up wheel hopping or skipping teeth on your belts, too little and you’re not braking as hard as you could be - thats something to test over time and fiddle with your settings to find.

At the end of the day though, the biggest limiting factor is how grippy your tires are. You could have perfect control, but if your rubber is a cheap compound aired up to 45psi you’re just gonna have less grip.

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They are Trampa Primo Alphas and I have them at 40 psi, so I might run them a bit lower

I try to lean back and there’s no belt skip, just wheel lock and bounce

Either feather the brake to the maximum amount you can give it before it starts to hop, or lower the maximum braking current to about that point so you can’t accidentally over-brake.
It would be pretty cool if Vedder added an antilock brake function to vesc tool in the future.

At the moment I run -50A brakes, which is more than enough to hop but not enough to not roll on like a 5 degree hill… suggestions?

Anti-skid should be a pretty easy implementation, if throttle <= -95% then toggle every 100ms or something

Dropping to 30psi should net you a bit more grip, and it seems to me like reducing your max brake strength in VESC settings might help when it comes to stopping distance. As for braking on a hill - your best option there is to just use smart reverse instead to do hill stops if needed.

I’m not 100% sure on this, but i think dropping your max battery regen amps might decrease the brake strength at higher speeds without affecting it as much at lower speeds, which could be your golden ticket.