Recent content by JohnAnanda

Measure the voltage between GND and SWIM on the speed sensor connector : 5V = old controller, 0V = new controller.

I just went for a short test ride with SW102 version... It's great ! On my usual test hill at max power (48V motor, 14S battery, 800W/17A) the motor is almost 10°C cooler than before ! Also the power delivery at higher cadence with field weakening enabled is better : with the previous version...

I used thermal compound https://www.aliexpress.com/item/32956752708.html?spm=a2g0s.9042311.0.0.27426c379bE71i It conducts heat like thermal grease, except that it dries and sticks like glue after 24h. It's not precisely known, but people seem to agree it should not go over 90°C. I've set mine...

This is where I placed it as well (but in the part facing the controller, the rest of the motor being wrapped with aluminium shims for cooling). It seemed to me that the motor laminations get hot first since they are directly against the windings. It works well, but I haven't done any...

No, 110 kilowatts of power per kg. The interest of this study is that they claim to have solved the problem of lithium dendrite growth.

"A dynamic stability design strategy for lithium metal solid state batteries" : https://www.nature.com/articles/s41586-021-03486-3 Now that sounds cool.. There's often a catch with newly announced technologies, like a low energy density or other parameters, but here they claim a power of...

Hi, I'd like to share my own experience with thermal dissipation. I first did the mods with thermal pads and grease as indicated in the wiki. I also added 20x30x2mm thermal pads against the motor laminations, between the flanges screws, and top of that, 3mm thermal pads wraped around the motor...

Anybody in for a SW102 donation to Mbrusa (if he's interested) ? I could order it and make the initial flahing with the case opening - I'm getting used to the process - before sending it to him. PM me if you want to participate )

If I understood well, the Torque ADC offset is not meant to be the value from which the motor will start. It's simply the "weight" of the pedals alone, so the system has a baseline. You can fine tune the pressure level from which you will have assist with the Torque ADC threshold value : the...

Well on my system (SW102 / 20.1C2) the error 2 occurs every time I exit the configuration menu, even though the torque ADC offset is set at the real (no load) value. Turning off and on the display clears the error and the values I have set are saved. It's not a big annoyance since the booting...

What you're looking for is the hybrid mode. Or the power mode with boost.

1) 2) As Casainho and other developers have explained, field weakening allows for assistance above 4000 rpm for the motor, but at the cost of a lower efficiency (= more heat). That corresponds to around 90 cadence at the crank. You can have assistance a little above 90 cadence without field...

I've read several posts describing the drag as low to almost imperceptible. It's very noticeable on mine, so I thought the one way bearing could be faulty and would let the blue gear and motor spin. I measured the voltage of the hall sensors when turning the pedals with assist 0, and didn't see...

I just installed it on the SW102. The startup time when turning the display on is much quicker, I don't even have time to read the booting screen ! One issue is that whenever I exit the configuration menu, I always get an error 2 : torque sensor. Switching off and on the display clears the...

Yep, that's how it's been for me as well. I do have a significant temperature increase and can overheat when using full power uphill (I have a temperature sensor installed), but it's no worst than the 20.1B version I used before. I rarely go over 85 cadence. Concerning consumption, it's a bit...