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  1. C

    Smoke and sparks coming from controller. Trying to learn what happened so it doesn't happen again.

    Thanks for the reply, I always thought that the ignition cable/blue wire in the display connector powers on a contactor/relay inside the controller that is normally open so even with the controller off but battery plugged in, there's only power up to the controller terminals and that's it. I...
  2. C

    Smoke and sparks coming from controller. Trying to learn what happened so it doesn't happen again.

    TLDR: What happened (most likely) is that hall sensor ground shorted to phase wires with the controller turned off but still plugged into the battery when brake disc rotor bolts chewed through insulation as the wires exist the axle. The short caused sparks and plume of smoke so there was a...
  3. C

    Controller upgrade from Sabvoton 72150 recommendations.

    An update on this incase anyone else finds this thread in the future with the same issue. I upgraded to the SVMC72200-M from 72150-M, both locked as MQCON does not sell unlocked M controllers. I was disappointed to find out that the 72200 is locked to 150A rated phase current just like the 72150...
  4. C

    Controller upgrade from Sabvoton 72150 recommendations.

    Thanks for the info. I think I'll try upgrading to 72200-M at some point, they are the locked version with display functionality. My battery is rated for 200A burst for 5 seconds anyway so I wouldn't even be able to fully take advantage of the unlocked one without upgrading my battery which I'm...
  5. C

    Controller upgrade from Sabvoton 72150 recommendations.

    The controller doesn't let me enter a higher value than 150 probably because it's locked so I guess there's nothing that I can do about it except upgrade. 72200 will probably limit the phase current to 200 so it's not going to do me any good. There is a thread on here of people trying to unlock...
  6. C

    Controller upgrade from Sabvoton 72150 recommendations.

    With almost fully charged battery (83v), doing a full throttle pull from a stand still, the voltage drops to 74v-73v with a peak power output of 9200w (according to UKC1 so take this with a pinch of salt, the watt measurement might not be accurate). I remember working out the voltage sag of this...
  7. C

    Throttle not responding

    Indeed, with both. Exactly, when I tested my throttles with external power source, minimal reading I was getting was 0.8v so that's what the controller should be getting. I tried it, with no throttle plugged in or hall sensors, I get perfect 5.00v, when I plug in the throttle, voltage on the...
  8. C

    Throttle not responding

    Yes, I mentioned this in my post, it's at 20mV with nothing plugged in and it jumps to 400mV-550mV when I connect the throttle.
  9. C

    Throttle not responding

    Running system, I probably should've mentioned this in my post but on the day when the throttle stopped working, I was experiencing delays when I was letting go off the throttle, sometimes it would take a solid second for the power to cut out after letting go off the throttle, sometimes it would...
  10. C

    Throttle not responding

    Regulators failing did cross my mind but eliminated it because if that was the case, wouldn't the voltage drop when I bypasses the throttle and put a wire between 5v and the signal/input? When I did that it was exactly 5.00V, didn't even drop a single mV. Unless the failing 5v regulators can't...
  11. C

    Throttle not responding

    I have a throttle that does not respond to any input, here's what I have done so far; - I used a generic 'general ebike tester' that has a built in throttle tester to test the throttle and it was working fine, to be sure, I hooked 5v to the throttle and with a multimeter, I measured the outout...
  12. C

    Controller upgrade from Sabvoton 72150 recommendations.

    I have a Stealth Bomber clone that I built about 5 months ago which I'm generally happy with but there's two things that I'm not happy with; it doesn't wheelie under it's own power, I have to preload forks and lift the bike to get it to wheelie and I want slightly higher top speed without...
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