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  1. scianiac

    VESC Flipsky 75100 Pro V3 MSUX3k & 72CV 40ah HELP

    That should be just due to the settings in Motor cfg > General > advanced, once you chance the max voltage to something slightly above 84v (the fully charged voltage of that 72v battery) and hit write to save the settings, then rerun the wizard and that error will go away and it will finish the...
  2. scianiac

    VESC Flipsky 75100 Pro V3 MSUX3k & 72CV 40ah HELP

    I mean they are not 5ah 18650s, the specs are wrong/lying and without knowing the cells in question how much power you can pull from them is unknown so reaching those power numbers of the motor may be totally impossible. I mean did you run the motor setup wizard and the input setup wizard? You...
  3. scianiac

    What motor and controller, dirtbike 60KW plus

    I'm just curious, what is your budget for this project?
  4. scianiac

    VESC Flipsky 75100 Pro V3 MSUX3k & 72CV 40ah HELP

    If it shows an overvoltage error you probably just have to set the voltage range correctly. Motor settings > General > Voltage and Motor settings > General > advanced. It's probably the latter maximum input voltage is set too low, should be slightly higher than your maximum battery voltage. The...
  5. scianiac

    VESC Flipsky 75100 Pro V3 MSUX3k & 72CV 40ah HELP

    The VESC wizard will find the motor settings automatically, if you have issues with tuning read this: VESC Tuning tips. That is a pretty small controller for a motor that size but I guess that depends on what you are after, will still go along nicely but you won't be pushing the motor very hard...
  6. scianiac

    Which Budget Spot Welder Should I Buy for a Few Battery Packs?

    It's funny they put more mosfets on them like that is going to solve any of their issues, I think these basically never fail from overcurrent spiking the mosfets. They either fail from crap fet driving design like luca has outlined or voltage spikes because they basically only use the fets...
  7. scianiac

    Which Budget Spot Welder Should I Buy for a Few Battery Packs?

    Buy one of the ones this guy has modded and do his mods, most of these have flaws in the circuit design that means while they do work they don't work for very long. The mods are pretty easy. Luca Obviously they still won't be as good as a more expensive unit but that is same as any other...
  8. scianiac

    [USA] Will Tariffs come about and lead to higher priced ebike parts

    My optimistic side thinks the tariffs won't hold out that long, either some deals are made, none of which will be very good and that's the excuse to roll them back or after 6 months congress or justice reverse them, they both easily have the power to given they are based on very shaky legal...
  9. scianiac

    What do you think of these HUGE rc brushless motors?

    They are there to protect the wires from abrasion caused by vibration. Cheaper motors don't have them because they don't care. You could remove them but you should make sure the wires are secured, possibly by wrapping them with more kevlar/nomex thread like they seem to be now and maybe...
  10. scianiac

    Hi, i need help about a new controller.

    I mean it seems controller quality is what you pay for, it seems perfectly possible for a controller to be made cheaply and reliably but it's not often the case. And it's not that they all fail it's just that some percentage of them fail because their designs are not amazing and quality control...
  11. scianiac

    What do you think of these HUGE rc brushless motors?

    If the motor manufacturer has a efficiency graph you could use that and the RPM you are typically running at to see where you stand on the efficiency curve, even if heat wasn't an issue I would assume that efficiency of the whole system is key for range and battery size. A slightly smaller prop...
  12. scianiac

    What do you think of these HUGE rc brushless motors?

    I mean to be fair why was this posted in some random 2012 thread that's barely related? How confident are you the prop pitch isn't too high and the motor is spinning too slowly leading to decreased efficiency? I would look at that first. And then I would make sure the intake airflow path is...
  13. scianiac

    Two wheel drive Beach bike

    I have also played around a bit with this and it seems to depend on conditions and what you are trying to do. I thought stopping the front wheel from spinning was always the best and used the VESC traction control to accomplish that but as it turns out that's not the case in some conditions. In...
  14. scianiac

    Mod this charger 40v down to 12v

    I mean like you probably could find them but probably more work than it's worth for a cheap power supply. Like quality 12v PSUs are somewhere between very cheap and free.
  15. scianiac

    plans to build a mid drive in ns snabb

    Or you could just like use a shorter motor.
  16. scianiac

    My kit middrive

    Appears to be conceptually a cyclone but with 219 chain instead of bike chain. A solid design I would say with better reduction than a cyclone due to the much smaller 219 sprocket and what is I'm assuming is a pretty similar first stage nylon geared planetary. Not exactly sure who it's for though.
  17. scianiac

    Porsche "AC battery"... isn't.

    I think one of the main reasons for solar micro inverters is to not limit the whole system output to the most shaded panel which begs the question if you have a battery pack with a multiple inverters could you spread the load to not limit the battery capacity to the weakest block, potentially...
  18. scianiac

    Best way to increase strength to dropouts on dh frame

    Yeah it kinda depends on the swingarm design but basically you just want some big and thick as you can clamping torque arms and distribute their torque farther along on the arms, both sides of course. On mine I used two plates on either side and those clamp either side of the existing dropouts...
  19. scianiac

    Does Lightingrods still exist???

    Honestly just go on the high voltage discord, he's on there daily and still developing new stuff all the time.
  20. scianiac

    Looking for help sourcing a motor for my ebike setup

    Exactly, and I think we will see more parts like this over time but may be slow. I think though as battery energy density keeps improving this weight range will make more and more sense. When I first built my bike I was super worried about weight but eventually gave in for most things because...
  21. scianiac

    Looking for help sourcing a motor for my ebike setup

    I mostly agree, but that is also my point, launching yourself 1m up on a bike weighing a couple hundred pounds is not exactly safe. But those also assume you have the skill to do those things, my bike is still well more capable then my current skills and that is probably the case for most no...
  22. scianiac

    Looking for help sourcing a motor for my ebike setup

    I mean 0 watts is plenty to be dangerous on a bike given a suitable hill. It all depends how you ride, I feel and historically am much safer riding offroad on my high power E-MTB than on my dirtbike (which has sat in my garage for many years now unmoved because it's less fun, harder to use, and...
  23. scianiac

    Looking for help sourcing a motor for my ebike setup

    Ah yeah that works better but I still suggest you slide the cassette over if you can to improve chainline. I mean my rear drive is all bike parts, the rear cog is a standard 58T narrow wide chainring with an adapter to the HG spine. My bikes are very much designed to be bikes and not motorcycles...
  24. scianiac

    Looking for help sourcing a motor for my ebike setup

    Huh that is interesting, also VESC controllers can use all manner of encoders sin/cos included.
  25. scianiac

    Spring seat suspension bouncing - is elastomer better?

    The elastomers seem to not be very bouncy, I have an old thudbuster on my fatbike (which has it's own level of bounce from the tires so hard to tell sometimes), they are actually pretty reasonably priced on ebay but I had to print new elastomers since the ones it came with were way to stiff for...
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