Recent content by Mcmattwich

So I was repairing someone's bike and it required that I install a sw900 display. Long story short, after a couple of rides they gave me the error 10, display not communicating with controller. There is a YouTube video of a guy who managed to connect a jumper wire to two points within the...

Yeah there's no sensor wire. But it adjusts quite a bit, by .1 of an inch at a time on the wheel. He won't care if the wheel size is set wrong if it makes the speedo right

Not at all! I'm so impressed by the responsiveness here, I have always looked at es posts that were posed to answer questions I had, I figured the ones with such outpour were outliers and there were endless amounts of unanswered desperate bastards that went unnoticed. First post though and I've...

I get that, I build battery packs. I just was under the impression the voltage for figuring watts was a constant in the equation

Okay will do. See this turned out to be important after all because it seems to me that something I thought I knew about batteries I was incorrect about, I always took the voltage in that equation to be the nominal vault of the battery, what it was considered like a 48-36 etc. wattage is...

Ok I mean it's not important to the actual process and solution here, which I'm grateful for. But it's not quite answered either. The sw900 I have can be set from 24v to 72 in the settings. (But 17s isnt one) The display reads out watts, that's it for the power measure. I get how using the...

Ok yeah I haven't continued. It made the noise and I stopped. I'll give them a switch around. So it's because non industry standard color coding pretty much? Not that there is an industry standard, just saying they're different

Ok so about the lowest it drops to is allegedly 200 watts

Yeah I get that. But the wattage being produced is based off the equation v x a=watts right? If it's only reading the voltage of a battery as it sits, then doing that equation for a 48v and a 52v, both of which are options in the parameters, would show different results, but a battery at 50v...

Ok I'll check. While I do that, how high should it go? And if the lvc is the only Factor affected, how would the bike know what to display for the wattage if there is no voltage known to this equation? I mean I get that it can tell the amps, but without knowing a nominal to multiply it by how...

So what lifted off the ground, and then hit the throttle and see what it jumps to?

Hm I didn't know it would be heard at the motor, but again, this definitely made the same noise on a sabvoton, which is sine wave. Plus, this is like metal on metal sound, though there's no evidence of that being possible as nothing is damaged. Visibly anyway. Inside the motor. The best way to...

Also my P1 is brightness?

This grinding noise isn't the controller, it's not the original controller he wanted to go with, and the first one I put ondid the same thing (sabvoton clone). But it was also giving problems with jumpy starts. I know the noise you mean, and this one IS noisier on takeoff than the original. But...

So I agreed to help upgrade a bike I was contracted to build a battery for. I have built my own bikes, so the required controller upgrade (was going for a higher voltage battery so was necessary) seemed straightforward enough. But it's been an array of problems since . Here are the stats as I...