We’re building the GoPiGo from a GoBox kit. One of the black encoders will not maintain a friction fit with the motor axle. It simply falls right off.
I’ve found that the issue is this specific encoder, not the axle; if I switch the encoders, the same encoder falls off, no matter which axle it’s attached to. When I remove both encoders and compare them, the loose encoder appears to have a slightly larger center slot. The other encoder stays on fine.
Is there a known issue with the cut of certain encoders?