One of my sensors is broken or has torn wires somewhere, so I switched to HFI tonight.
After trying the various HFI and sHFI modes and playing with HFI gain, I found settings that work as smooth as sensors. I’m running Coupled sHFI with vesc default settings for everything including HFI gain at 0.300.
It makes a little bit of noise, but the back right motor isn’t cogging anymore, so I’ll take it.
I was down in Joshua tree for climbing with some friends over the weekend. I took a rest day and visited @Arzamenable, Sidney, amd Gorge for some riding and hanging out.
Mike - thank you for the hospitality and the well needed shower. Hope we can ride again soon.
This remote is freaking awesome. 10/10. I love it. I feel like I have much more control with this remote than thumb throttles.
@Zyb is there some amount of deadband built into the throttle firmware? I’m running 1% deadband on vesc because anything higher felt like too much deadband. (Read: any 
)
Have you checked his YouTube videos yet? They’re pretty comprehensive and easy to navigate.
Yeah I watched the videos but didn’t see anything about deadband. Also saw in the zmote thread that there was discussion of brake deadband (which makes sense because brake overrides throttle).
I’d be interested to know if you or @Zyb have a recommendation for deadband setting in vesc?
Board update - 9” tires and range test.
Now running trampa’s 9” mudplugger on phatlads at 25psi. These add a significant amount of cushion when I bunny hop or run over things. Mostly, they are better for the loose dirt I frequently finding myself riding. Less likely to dig in and make me eat shit. It still happens, just less than with the 8” tires.
Only downside is they aren’t as smooth of a ride on road, but I can swap back to the 8” tires for that. The 8” shit slinger are on MBS rockstar ii hubs for hot swap on the jump drives.
I got 32 miles of range out of 80 cells. Most of this was road and trail riding but I did do about 8 miles of gnarly loose hill off rod area climbing to get to the view of the valley.
The 9” tires make me want to go really fast. Also, bunny hopping over ruts in the road is quite hard with a 50lb board.
I’ve been trying to find a reason for this because I noticed the same when I went to 9" tires. I originally did it for the offroading but noticed that I felt a lot more… grounded (?) on the road as well. Still need to try some mudpluggers out though.
I’ve also felt that urge on 9in. My theory is that the road feels smoother on bigger wheels because of the relative difference in height between any given road imperfection and the diameter of the wheel.
Bigger wheels make road feel smoother make rider go more fast
Nice! Yes 9” really help on sand. 8” possible with skill & light rider weight but supermanning always possible. The Trampa golfas are so wide they may make 8” great again
Well my hall sensors or my hall wiring has been beaten to shit and now my back 2 motors have non functioning sensors.
My initial experience with sHFI on these motors with default settings wasn’t great. I noticed that they have relatively high ld-lq inductance to overall inductance, based on what @Deodand stated in his tuning video.
Based on that I figured I’d try tuning the sHFI parameters. I was, of course, lazy af. So I just upped the HFI run voltage and max voltage to 10v each, dropped HFI gain to 0.150, and boom the sHFI 45deg v0 works fantastic. I took it out for a spin off-road with some gnarly low speed hill climbing on rocks, and I didn’t get any cogging. I’m stoked. This is way more fun to ride than sensorless. The noise is not as loud as regular HFI but it’s obviously still noticeable.
The d100s do also have phase filters, which vedder has stated will improve the sensorless performance. I’m not sure if he is referring to HFI in that statement or just general sensorless FOC.
I’m planning to try my hand at real HFI tuning, instead of guesswork, but I’m pretty happy to have sensor like performance again for the rear motors.
9 provide less road bumps being transferred but there also less responsive so reduces rider oscillations.
the weight increase imo is the biggest reason, heavier board feels more ground but the weight is also on the hanger.
Update: the croix mountainboard is dead until I can find time to tear down one of the gear drives / motors.
I was riding yesterday and felt some motor weirdness from one of the back wheels. I had been riding over roads that had cracks recently tarred, so I chalked it up to hitting a slick spot.
I rode another few miles before picking up my board at a stop and my back right motor burned my arm. All the other 3 motors were just warm to the touch at 55c. The third motor has a broken temp sensor, but it was well over 100c for sure. It was painfully hot to touch.
So it wasn’t a slick spot in the road - it was motor magnets demagnetizing because motor was overheating like crazy.
I’m assuming I have a bad bearing in the motor, or something else in the gear drive is causing resistance. I’m pretty disappointed, because I only have about 300 miles on this board. I didn’t expect something to go wrong this quickly.
I guess I could set the motor to 1 motor amp in vesc and just treat that wheel as dead weight. Any reason that is a dumb thing to do?
You can actually set it to zero amps. I dont remember if it’s battery amps or motor amps you want to set to zero. One makes VESC ignore it, the other makes issues. @jack.luis did this on Mistfall when one of my motor pinions failed, so I could limp home on one motor.
Better to set wattage to zero, only one setting. Just don’t forget you did that or you’ll be confused and angry later lol
Oooofff. Sorry to hear it dude.
I only ever tried a 3 wheel drive 4wd once and it sucked balls, but that was just straight disconnecting the motor.
Made all sorts of weirdness.
Took the overheating motor apart today to see what was going on. Suspecting a bearing at first, I was interested to see an enormous amount of dirt grinding away at the magnets.
Took me a minute before I noticed the fried windings. One phase is totally torched. I’m surprised this motor was still working. It’s cooked for sure. Replacement ordered.
I’m not sure why the motor nuked itself. It never sees high amps and it’s rare that the motors get above 65c.
#justmaytechthings
Welcome to take these. Sensors not working.
lol, just had them out to convince someone else of bad idea with mt60/mr60s and bullets.
Thanks Mike - that’s is a very kind offer. Do you know what kv they are?
