Recent content by leoms

The shaft is attached to the outrunner's bell (rotor). If I leave it that way and glue the stator bearings, while sets, the stator will be surrounded by magnets, which will very possibly pull it in one direction or another... is this a problem? Think it's a better idea to un-set the shaft from...

Oh that's great, sounds like the best option most likely. Thank you.

Thanks all... My calipers are mechanical and not quite precise enough to capture this variation, even though they're ticked down to the thousandth of an inch. It appears that the bearings are not bad or worn out: they feel new, and the shaft play feels identical in both, suggesting that they're...

I have an outrunner which was making noise, and I think the reason is that the shaft doesn't fit tightly in the bearings. It's a 12mm shaft and the bearings are supposed to have 12mm bores, but it turns out that the fit is not tight. I'm going to try to fill the gap with retaining fluid. Anyone...

I have an outrunner which I took apart (to diagnose a problem, which turned out to be play between the shaft and bearings; I'll ask about that on a different thread). Before I put it back together I want to make sure the shaft is perfectly straight in the rotor. It slides into a holder which is...

Thank you! I'll play around with it, and try to find info for similar cells.

My bike has a battery pack with sets of 3 LiFePo4 cells in parallel. Each has 3.8Ah and recommends max charge current of 1C=3.8A. All well and good, I try to charge the bike even slower than that. But I'm interested in running my regen brake as hot as possible, because (at least for now) it's my...

Oh, I definitely did turn the limits down to what it seems like my hardware can handle as soon as I realizede they were too high. For the battery, this was pretty easy: I looked up the exact cells and also read in general about LiFePO4 cells and what they can do, and did the math, and I can also...

I have no interest in pushing my equipment past its limits - the trick is that I'm new to inferring what those limits are! So I really appreciate your tips. I don't trust the specs on the motor (they seem unrealistically high) and the guy I bought this from re-wound the windings to increase...

Thanks all - especially after reading amberwolf's message (and their responses on my other thread), I don't think this is a straightforward heat issue. I do regular finger checks on the windings themselves and they never feel hotter than about 150F, and the wires and resin in the windings are...

Hi all, I'm having some issues with my mid-drive outrunner motor which I think are heat related. After running it hard up a hill (high torque, low airflow) it emitted a little wisp of smoke. I backed off, of course, and things seem OK, and I'll be gentler. But in an ideal world I'd improve its...

With the new limits (calculated by the Vesc automatic tool and based on the battery parameters I looked up) the bike is mostly working great. But occasionally, when I hit the throttle hard for five or ten seconds, the acceleration just cuts out. As if the ESC is automatically stopping the...

Thank you!! I ran Vesc's automatic motor setup and it substantially reduced the current, and the problem resolved. I really apprecaite this.

I have a custom made mid-drive bike. When I punch the throttle at low speed, there's a loud popping noise and the motor, I believe, jumps/backfires/skips. After being too casual about this, I discovered smoke coming off of a blackened-looking stator post (sorry if that's the wrong word, the...