It’s great to see the progress, especially hearing about the Onewheelers’ success. I’d be very interested to read about the results, as I am also looking into replacing the controller and battery in a Onewheel Pint. I know at least @aquaponiccowboy has had the same plan, though he seems to have switched to a Plus?
I’m a huge noob, still very much in the research phase, so any information from more knowledgeable people would be greatly appreciated. Right now I’m debating a bit whether it makes sense to attempt this with the Pint, I’ve come to the conclusion I really need to be able to stuff a 2p battery into it for it to be worth it (for the range as well as the advantages it has current-wise), does anyone have thoughts on that? I was planning to open my Pint to have a look at the room I’ll be working with, but the weather is great this weekend so I’m shredding instead. As I want to ride my board, I’m thinking of getting another (preferably broken, but doesn’t seem I’ll be so lucky in EU) one on the cheap to mess with. There’s a cheap one up for sale now, but I’m not decided yet!
My goal is to bring the Onewheel with a FOCer to a comparable level of reliability and comfort as the original and just completely change the game performace wise. (no idea yet how much the motor can really handle, any of the testers having some data on this already?) I’d also like to document stuff for others, it’s been quite hard for me to research the information (and I’m still in the process).
Anyway, can’t wait to get my hands on this fine FOCer to mess with over the winter
I got a seek thermal camera. Anything you’d want to see if I took some pictures? I don’t currently have a good way to make a good load at the bench though, and just got a couple inches of snow, so i won’t be riding outside for a few days…
@Flux and other testers have gone up to 90A max motor current with success. Motor current drops dramatically though as you gain speed and the load on the motor drops down.
No worries. I’m working on documentation as well for this. Mainly a Setup and Tuning Guide with the Little FOCer so you can dial this in to your rig based on the type of motor being used.
Wow, 90A is a lot, right? (I have no point of reference of how much my Pint might draw in peak torque). And (noob alert) can you even draw that much on a regular battery setup? How much peak can you draw from say Samsung 30Q 2p?
Also I was wondering more about continuous worst-case scenario, think 20s battery (stock OW has 15s) going steep uphill in hot weather, how much can you draw until the motor starts overheating - are the motor’s limits already kind of reached in stock OW or do we have reserves to tap here? Or am I thinking about this wrong?
One important thing to know here is that motor amps are not necessarily equal to battery amps. Motor amps can be several times the battery amps at low speed (low duty cycle). This is a power electronics concept that I can go into painful detail on but maybe on another thread.
Just know to set your maximum battery amps on the controller based on the battery’s limitation. Motor amps based on the motor’s. You can dig around this forum to find out more!
Been following for a year or so…though Im more comfortable around hammers and saws. Been hacking around different battery chemistries for my Radwagon ebike. This gadget seems jam up and jelly tight for such things. I see using VESC software for configuring, but Im wondering about creating typical touch screen dash displays…perhaps with a Raspberry Pi and QT Design.
I suspect this might be wrong forum wihen it comes to peripheral devices, please bear with me.
I just got a NRF52 module working as a “built in” Bluetooth device for the controller. Gunna toss it in the PCB layout and then start getting these things manufactured. Just really wanted to get the bluetooth thing figured out first.
Beta testing is still going well. Large hub motors require some tuning to work smoothly but everything else seems pretty low effort to get up and running.
The goal to is make a Setup Guide based on the motor you are using. So the guide will have the suggested setup procedure and detection settings to get the best experience. This info is coming from my own analysis as well as the beta testers
You won’t be maxing that motor out with the little FOCer. I also have a hub motor about that size (MXUS V3). That motor will be better paired with the Serious/Big FOCer that is planned to do 150A or more. Not that the little FOCer couldn’t run it. It just wouldn’t push that motor to its max potential
As I want to ride my board, I’m thinking of getting another (preferably broken, but doesn’t seem I’ll be so lucky in EU) one on the cheap to mess with. There’s a cheap one up for sale now, but I’m not decided yet!
