Segway Ninebot S

[evm]

My ninebot recently started steering left out of no where.  I'll be riding and all the sudden the unit goes left.  After jump off the unit will still slowly go in a circle to the left.  Powering the unit off and on stops the unmanned unit for some time but comes back randomly.     I also feel like as I am riding I am constantly compensating by leaning right with my left thigh.  I have about 900 miles on this unit.  What could be causing this problem?

[fred_dot_u]

Does the mechanism have a visible tilt to it? If it does, there's a spring imbalance. If it does not, there's an electronic circuit imbalance. I've not disassembled that model, but it could have either a potentiometer also known as a variable resistor, or a hall effect sensor. The latter is more reliable and more precise, so I'd expect to find that type of sensor inside. Ideally, there will be a means of centering the sensor readings.

 

Without seeing the internals at the pivot bolt, it's tough to get more accurate in my answer.

[evm]

The shaft does have a tilt to it.  How do I go about fixing the spring imbalance?  Are there any tutorials out there?

[fred_dot_u]

Can you toss a couple photos of the assembly? I'd be surprised if there is any documentation for these devices, but I've been surprised before, not related to the scooters. My S8 might as well be a paperweight for the lack of deep board support from the manufacturer. Well, one of them is. I'm glad to have a couple that still move me.

[evm]

I will post some photos.