Update on the flipsky 63100 motor screaming.
I opened up another 63100 I got a while back, and this one does not scream at all.
It feels like it has a little bit more cogging torque, not sure where that comes from, but the parameters are the same.
I did notice that the one that does NOT scream has a slightly larger gap between the can and the bell. According to my caliper, the difference is 0.7mm vs 1.00mm.
Maybe the solution to the screaming is to add an additional 0.5mm shim to the shaft inside the can?
Flipsky is also using a wave washer to hold the c-clip in place, looks like they’re taking motor assembly pretty seriously