rbrak29
100 µW
Purchased a Bafang G310 kit from Grin. Baserunner with Superharness and Fischler AG bottom bracket torque sensor. Install was simple, but no assist, only throttle. First Grin did not program the controller correctly as I only had speed while on throttle and not while pedaling. Had to buy a programming cable to fix setting. The resting torque sensor voltage was 0.16V. Should be 0.5-0.6 as default offset is 0.6V for the Fischler. Grim had me do some changes mostly to assist levels in the display. Did not work. Grim sent a new BB. Resting voltage now 0.57V. Still no assist. After road testing voltage dropped to 0.37V. Grin made me change some settings, but still no assist. Sent the old BB back to Grin and they installed it on a demo bike and it worked fine according to them, but they increased the multiplier to 1.00X from default of 0.14X. Offset 0.6V (Fischler default), gain 25Nm/V (Fischler default).
Made the same changes. On the road the assist is all over the place. Pushing…0 watts, slightly let up while still pedaling..watts go up, sometimes to over 150 based level selected. Push again, watts go to 0. Stop pedaling and the watts shoot up. Almost impossible to control assist.
Assist will only occur if torque sensor voltage sent to controller is above offset (0.6). Since mine is 0.37, I set the offset to 0.30 and gain to 50Nm/V (seems more reasonable). I now have assist. With the changes I made to the offset and gain, the assist felt much better and I left the multiplier at 0.14X. On the road the watts do not bounce around as much and they do not go to 0 when pushing.
The problem is the resting voltage is dropping. Not below 0.30 yet. If it does I will have the reduce the offset accordingly.
The only thing I can think of is the Baserunner is drawing down the resting voltage coming in from the Fischler. The Baserunner does have a battery/power tap installed by Grin. Nothing is attached to it.
Thoughts.
Made the same changes. On the road the assist is all over the place. Pushing…0 watts, slightly let up while still pedaling..watts go up, sometimes to over 150 based level selected. Push again, watts go to 0. Stop pedaling and the watts shoot up. Almost impossible to control assist.
Assist will only occur if torque sensor voltage sent to controller is above offset (0.6). Since mine is 0.37, I set the offset to 0.30 and gain to 50Nm/V (seems more reasonable). I now have assist. With the changes I made to the offset and gain, the assist felt much better and I left the multiplier at 0.14X. On the road the watts do not bounce around as much and they do not go to 0 when pushing.
The problem is the resting voltage is dropping. Not below 0.30 yet. If it does I will have the reduce the offset accordingly.
The only thing I can think of is the Baserunner is drawing down the resting voltage coming in from the Fischler. The Baserunner does have a battery/power tap installed by Grin. Nothing is attached to it.
Thoughts.
