I had 2x BMC 48v1000w geared hub motors. I thought there may be a bad hall, so, to save time and effort, I swapped out the axle, stator and coil. Now, the internal will spin when throttled, but the axle wont engage. When I assembled I was sure to seat. Im confused.....
Gears not meshing BMC 48v 1000w hub
- Thread starter anarchy
- Start date
Maybe the motor is running backwards or possibly the clutch is installed backwards. With the power off, try spinning the wheel by hand in both directions. The freewheel clutch should engage when turning backwards.
If the core unit (axle, stator, rotor, gearing, etc) was one unit, then it should just work unless it's missing parts connecting the rotor (magnet ring "bell") to the sun gear (which might be machined as part of the bell, or a separate part fixed to it via a key, etc).
If the motor was disassembled past that point, down to just the stator and axle (don't konw what the "coil" would be, the only coils are normally part of the stator as motor windings), then perhaps it was reassembled without the sun gear connecting to the rotor bell, or if the clutch was not attached to the axle fully (via key, etc), or the clutch was installed backwards.
Alternately, if the wiring to the controller isn't the right phase/hall combo, it might be spinning the motor backwards, which wouldn't spin the motor casing because of the clutch in the planetary gearset.
If these are being controlled via the baserunner in this unresolved thread
endless-sphere.com
then the autotune might still not be working for the reasons given in that thread, and manual phase/hall combination wiring may be necessary.
If the motor was disassembled past that point, down to just the stator and axle (don't konw what the "coil" would be, the only coils are normally part of the stator as motor windings), then perhaps it was reassembled without the sun gear connecting to the rotor bell, or if the clutch was not attached to the axle fully (via key, etc), or the clutch was installed backwards.
Alternately, if the wiring to the controller isn't the right phase/hall combo, it might be spinning the motor backwards, which wouldn't spin the motor casing because of the clutch in the planetary gearset.
If these are being controlled via the baserunner in this unresolved thread
Baserunner + BMC V3 48v 1000w.....wont autotune/detect halls. error 1-6
I tested volts from z9 to the hall sensors....just under 5v to each...pcb perfect....its a brand new motor! 80 pole pairs based on 5:1 gearing and 16 pairs. Autotune defaults to sensorless. I tried kv 9-13 and no difference. Anyone have a clue?
endless-sphere.com
I couldn't find a good disassembly set of images or exploded diagram of that specific motor in a few seconds of searching, but did find this that atleast shows the general assembled state of the 600w version motor core from the clutch side.
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