I’ve been tinkering with one of my boards after swapping out the Ling-Yi esc with a Ubox. I noticed that it has an occasional slight stutter at full throttle only. The ramp up is silky smooth both unloaded and when riding. I wasn’t geared up properly (plus my body and bones are old)when testing so I didn’t push the speed, but things seemed fine on the short test run. I started searching the issue here and found a post where Evwan mentioned micro stutters can be a normal occurrence when bench testing so I’m wondering if that’s what these are? Hopefully it’s noticeable in the uploaded video. Any input is appreciated.
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Looks normal to me boss. You’ve probably seen all of the typical ubox shenanigans, so be careful and check on your battery often when not using the board.
Also, uboxes can be weird, set your fault stop timer to 80-100ms. In case you get a cutout, it’ll be much shorter and much less likely to throw you off.
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Honestly I haven’t heard too much in the way of specific issues. Some general stuff about them being occasionally buggy and firmware finicky I think, but that’s all I remember. Can you elaborate on the battery issue? Is it related to the parasitic drain that the Spintend equipped XLR suffers? If so, I wasn’t aware the the other Kalys with Spintends were suffering the same symptoms and thought it must be related to the electronic stabilization. My Kaly is older and has a Unity in it so this Ubox is my first Spintend product. Now I was aware that I needed to reduce the fault timer from the 500ms default so I’ve got it at 80 now.
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Kalys with newer batch uboxes have this issue. No clue why.
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Any chance you can share your vesc tool settings? or how you decided on them. I need to program my 2nd board and my main board has always used some version of a Ling-yi controller.
I was eventually going to ask and see if anyone has suggestions so this post came at a perfect time since you have experience with what a Ling yi feels like.
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Honestly I’ve been changing it up as I learn and experiment, so I don’t remember exactly where I’ve settled as far as my current configuration at this point. My settings are obviously being made with my specific hardware in mind though, and the only thing that is still stock Propel are the motors. The battery is a 12s 6p custom job with 40T cells and my remote is a VX4, so that’s what I’m working with. I do remember that mapping and curves are at these numbers for now: Throttle expo= +10, Brake expo= -6 and Dead band= 4%
I’ll also say that I’m tuning for smoothness and predictability more than anything else. I’m not needing to wring every ounce of acceleration and aggressive braking performance out of it. As much as I hate to admit it, my reaction time isn’t what it once was. Muscle memory (specifically linking my thumb to body weight shift) is helping to close that particular gap in my skills, but even that is developing slower than I’d like.
I know I’ll need to change stuff since you have tires and I’m running thane. Just figured it could be a good starting point.
I prefer that too. On my ling yi I do have a high+ mode but I only use it rarely because it is so jerky but also sometimes the acceleration is worse than it is in the high mode. So you get jerky acceleration or baby acceleration with no real way to know which one it will pick. Gotta hope it gives you the fast jerky option if using it at lights and if it doesn’t you look more like an asshole for taking so long to get through the intersection 
When I got the Endeavor it was a new enough experience that the abrupt jerk with throttle input was sort of forgivable maybe? I rode it several times and thought I was getting used to it, but it only took stepping onto my Kaly or Lacroix for a minute to be reminded what smooth speed control is like. From the brief ride, I can tell that it actually pulls harder than it did with the Ling-Yi, but does so with a predictable nature when you roll on the thumb wheel from either a dead stop or when accelerating while rolling. I will say though, that I really didn’t hate the brakes from the Ling-Yi or theLing-Yi remote.
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Well it seems like the slight motor stutter on the bench translates to slight motor stutter while riding. I have done little riding but took this Endeavor out for a quick one yesterday and could feel it at about 25mph. I need to probably dig into my settings and double check everything I guess and run motor detection again. Oddly it’s also not running one side as fast as the other. RT data (and speed display on the VX4) on that side show a top speed 4-5 mph slower than when the VESC tool reads the other side. I can not tell if the stutter is one side only though. I am reasonably certain it’s related to the U box since pinning the throttle wheel didn’t cause the top end stutter when the crappy Ling-Yi was in it.