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Menampilkan postingan dari April, 2019

Ninebot by Segway ES2 E-Scooter: Rear Wheel Maintenance

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After barely 50 km of riding on the Segway-Ninebot ES2 e-scooter, I found that the rear wheel has developed some looseness. When pushing it from side to side, there is noticeable play. Also, when riding, I can detect some knocking sound coming from the rear wheel due to this looseness.

In order to fix this issue, I went online to find a solution, which shows you how to remove the rear wheel and axle. Here is how it is done!

First, we need to remove the rubber mat on the rear fork, as the screws are located underneath. Use a hairdryer to soften the glue before pulling it off gently.
Once the mat is peeled off, the screws can be seen.
I noticed that the rear cover was already cracked, maybe from overtightening by the factory? Or some impact to the side of the cover.
Do the same for the other side to expose the screws, so that they can be removed.
There is another screw at the side of the cover. Each cover has 3 screws that needs to be loosened before the cover can be removed completely.
Take o…

Ninebot by Segway ES2 E-Scooter: Folding Mechanism, Mobile App, Battery Calculations

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Finally, let's take a close look at the folding mechanism of the ES2 e-scooter. It is difficult to design a folding joint that is strong, durable and also free from looseness. For the last requirement, to be free from looseness, it is only possible if there is some kind of pre-load mechanism, to apply force to press two parts of the frame together.

On the Dahon folding bike, the two folding areas are the main frame clamp, and the handlepost clamp. Both have adjustable clamps to allow adjustment of the clamping force, so that if it loosens or wears out, it can be tightened to make the joint tight again.

It seems that there is no adjustment mechanism on the ES2, which means that there will be joint looseness over time, from wearing out of the contact surfaces and the gradual loosening of the joints.

Metal pin slots into the groove when unfolded, locking the two parts (handlepost and base) of the ES2 together.
The rubber piece (1 on each side) is compressed when unfolded, which reduces t…

Ninebot by Segway ES2 E-Scooter: Lights and Suspension

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After taking a look at the handlebar area of the Ninebot by Segway ES2 E-Scooter, let's now take a look at the other parts of the e-scooter. More specifically, the integrated lights and also the suspension design.

Warranty seal located at the bottom of the handlepost. I think there are 2 bolts behind the seal.
Front part of the e-scooter, which links the handlepost to the front fork to the platform.
Electric motor is integrated into the front wheel. Also, there is a simple coil spring located inside the rubber sleeve to act as the front suspension.
Front white light integrated into the top of the handlepost. It is quite powerful, and is angled to shine straight ahead. Does not really illuminate the road, it is more of a to-be-seen light.
Rear red lights located on both sides of the rear wheel. The rear lights will flash when you activate the brake lever.
There are also many LEDs located under the platform, which will glow nicely. You can choose the colours and the illumination pattern f…