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  1. stan.distortion

    Problem flashing TSDZ2 on linux SWIM error 0x05

    Maybe try turning on debugging before running make on stm8flash? Looks like line 10 in the makefile does it: https://github.com/vdudouyt/stm8flash/blob/master/Makefile No idea what's causing your problem but talking to microcontrollers can be hit-and-miss in my experience. I've had lots of...
  2. stan.distortion

    Problems with Votol Em200sp and low acceleration.

    Max torque at 175rpm, that's motor rpm, not output shaft after primary reduction? I'm guessing motor rpm, iirc the 90h doesn't come with primary reduction so if you're doing 15kmh at 175rpm then that's 85.7kmph/1000rpm... you're geared for about 260kmph before the field weakening kicks in??
  3. stan.distortion

    Yamaha YZ250F

    PTFE sheet might be another option, I've never seen it used as gasket material but thread tape does a similar job well and it's reasonably cheap and readily available.
  4. stan.distortion

    Yamaha YZ250F

    Have you got enough depth to cut an o-ring groove in the motor side face? Gasket paper with plenty of grease on one face might work but still sticks after a while.
  5. stan.distortion

    Question about 12v li-ion 3s battery for RV.

    That's a 12v inverter and if so, any idea what its low voltage cutoff point is? Could be it will work fine with 3s and you're going to need to limit charge rate from the vehicles battery anyway. Not sure what the options are for 12v(+) to 3s charging, RC balance chargers would be one possible...
  6. stan.distortion

    Question about 12v li-ion 3s battery for RV.

    Iirc 4s LifePo4 gives a closer range, energy density isn't as good as Li-ion but lifespan and discharge rates are generally better. You're running the lithium cells alongside lead acid? If not, BMS voltage limiting could be an issue, alternators burn out pretty much immediately if disconnected...
  7. stan.distortion

    wr250f conversion

    @amberwolf, Thanks, it looked simple from looking at controller schematics but I hadn't come across discussions on it before. Still surprised variable regen isn't a more common feature on these newer controller brands (wasn't aware the bigger APTs had 2 levels), maybe not too far off though...
  8. stan.distortion

    wr250f conversion

    For the regen, does anyone do add-on regen modules? The circuit looks relatively simple, a 3 phase rectifier with DC current regulation, I could probably even put one together within my (very limited) electronic hacking skills. Failsafes might be tricky but if something like that would be...
  9. stan.distortion

    gas price thread

    Oil prices have very little to do with supply and demand. A recent example is the crash from over $100 to less than $40 in 2014. That was negotiated by the IMF and had two major effects, firstly it initiated recovery from the 2008 crash (oil gets cheaper, everything gets cheaper) and secondly...
  10. stan.distortion

    Embarrassingly Simple questions - Choosing a Voltage

    I'm surprised no ones mentioned the safety aspect yet, even 24v can give you an unpleasant surprise when you're stuck out in the rain and touch something live and that can turn into a very nasty surprise or even something lethal as voltages rise. Of course, we should never be touching live...
  11. stan.distortion

    Advice ATV motor

    Not "also" important, the battery is of primary importance, it's what you start with and develop around. It's counter-intuitive coming from an infernal combustion background, feels like designing a drivetrain based around the fuel tank but that's the way it works with electric, specify your...
  12. stan.distortion

    KX250E

    Great job! :bigthumb:
  13. stan.distortion

    gas price thread

    Hard to distinguish between reservoir hydro and wind in that pic, interesting all the same :bigthumb: The main issue with wind is storage and the main issue with storage is incentive. The private sector can easily provide the masses of storage needed but it has little incentive to do so without...
  14. stan.distortion

    Ford model T conversion

    1. Usually a high current contactor is used, a damn big relay and that would usually be actuated with 12v, it's switching the full battery voltage (72v?) with a lower voltage. 3. Immobiliser, usually ok to leave disconnected but it depends on the controller. 4 and 6. High or low brake (regen)...
  15. stan.distortion

    Ford model T conversion

    That should make a really nice conversion :) Wouldn't have gone for hub motors personally as there's not a whole lot of weight in a T so unsprung weight will have a big effect, mounting might be tricky with wooden wheels and iirc axle location is by torque tube but hubs are definitely the...
  16. stan.distortion

    gas price thread

    The cops, and they sell 'em off cheap :D They're the business, using a cf-30 atm and it's had several falls of vehicles and workbenches onto concrete floors, doesn't mind getting rained on much either. Had a cf-27 once, surprisingly good for an ancient P2 and it fell out of my backpack while...
  17. stan.distortion

    QS 3000 138 motor bike installation generalized

    Yeah, the swarf from burrs is vicious stuff! I'll normally put a sheet of plywood, steel, whatever is to hand over the bed if grinding, best avoided altogether imo but there's sometimes no alternative. The extra rigidity is the big danger when fixing a grinder to a lathe, if things do go wrong...
  18. stan.distortion

    QS 3000 138 motor bike installation generalized

    I'd be more worried about the bloody things being transported through the air to the lathe bed! Always cover the bed whenever any kind of abrasives are near it, that crap gets between the slides and becomes grinding paste. If that grinder snatches, what's going to happen? Can't see from the pic...
  19. stan.distortion

    Homemade Axial flux PM motor

    Cool! :) Could be worth going over each poll one by one with a magnet and a light dc current to the winding just to make absolutely certain all polarities are correct. An oscilloscope would be a really useful tool too, maybe even essential when you get into the fine tuning. I've got a Hantek PC...
  20. stan.distortion

    Homemade Axial flux PM motor

    You're certain all your polls are wound/wired in the correct direction? I've messed that up a few times before, with generators so the only symptom was rough running and low output plus but the symptoms would be similar to the vid as a motor, trying to drive against its self.
  21. stan.distortion

    Swing arm question

    That "professional" arm isn't really all that professional, it should have much more bulk around the pivot area and the side plates are far heavier than necessary for most of their length. Nice tidy job though, the side's are likely for the sake of convenience and it gives a clean look but I'd...
  22. stan.distortion

    gas price thread

    That's probably going to be the number one economisation technique, road trains to minimise aerodynamic losses. As far as I know google have been testing it for several years, one driver (e-stop button presser) in the front vehicle and the rest of the train slaved to it. Upgrading railways would...
  23. stan.distortion

    Purple

    I'd guess its rust prevention too, might be something along the lines of engineers blue either, used to highlight where contact is being made between parts (if the rotor was rubbing off the stator it would help show where, ie. if the stator was off-centre it would only be touching at the high...
  24. stan.distortion

    What can ES do to support open source ebike software?

    Have you any idea how valuable that is!? It's probably worth just about any useful bit of software you'd like to see written, many (most?) devs love good documentation but detest having to write it. Did I offer to write something for an Arduino a while back, throttle re-mapping iirc? The offer...
  25. stan.distortion

    Motor Torque Smooth

    ie, "learning" control, it knows what to expect so can react better to the unexpected. Are you also using speed, the time between positions? I'd imaging the troughs between peaks would be hard to use otherwise and they're usually where I'd stop peddling. Could also work for low power, keep...
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