would you mine breaking it down for me so i dont have to ask you every time i change pulleys or wheels size
Thanks for the reply guys!
@Pablo_702 I would choose a premade DIY battery pack for the convenience since I’m still new at this. I can solder but I’m not sure about where to buy legit 18650 batteries and what BMS chip, and how to put it all together (though i’m sure there are plenty of tutorials out there).
How is erpm calculated? But with the erpm in mind, I suppose I could go with a 6s and be just fine. I don’t plan to commute with it (just joy riding). If I opt for a DIY battery pack (with the built in BMS), do I still need a balance charger?
As an alternative, if I go for a 6s Lipo setup, what would be a good setup? (Which batterties/BMS/Charger/ and anything else i missed, would I need to buy?). I would probably opt for lipo’s if it was (a lot) more cost effective.
Thanks for the help guys. Can’t wait to get parts orderedd
eRPM = (voltage)x(kv rating)x(7 pole pairs, for most 50-63mm motors)
so gearing dont play a role in erpm?
nope. you calculate erpm without load.
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If I purchase a pre-made battery pack with a BMS (from DIY for example), do I still need a balance charger?
BMS balance charges for you. so no
There’s a few places to buy in here in the states that are good. LiIon Wholesale is the cheapest I’ve found…
I have a quick question. So I have a tacon 160 245kv and have it with a 12s battery. Could I just limit the erpm to 60k and it will be safe right? I haven’t tried it yet cause I’m waiting on my enertion vesc.
You could, just not ideal
So no damage to the vesc even if I go full throttle?
nah, hitting erpm limit shouldn’t damage the VESC anyway, just causes errors. The hard limit is 100k.
Oh seriously? Huh I must have misunderstood that kv thread. Thank for the help 
nah, hitting erpm limit shouldn’t damage the VESC anyway, just causes errors. The hard limit is 100k.
The errors at high ERPM will actually blow the DRV8302. A good/bad analogy would be a misfire while redlining an internal combustion engine.
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my mistake!
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No worries! There is a lot of information out there, it can be a challenge to digest.
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Just to be very clear ?,…when a ERPM of 60.000 Is Set …and Hit at full throttle, what happens ??
- Damage to chip?
- just limiting rpm
- cutoffs ?
You can set the vesc to have a limited erpm below 60k so you cant exceed 60k erpm while riding (Im doing this). Yes going over 60k will damage the vesc and cause errors.
My question is what happens when you hit the Set erpm limit ??
Does the motor just continue to run at that limit, or does the motor cut off ??.. dont wanna be thrown off board if motor just cutts off when limit is hit ??
From what I understand, it’ll stop accelerating after hitting the set limit. If you check “limit erpm with negative torque” it’ll slow down your board if it goes past the limit. Please correct me if I’m wrong.