DEWBOT VI Drive Train Tread Wear

One of the issues we had at Drexel is that one wheel had extreme tread wear. This page is a discussion on what the problem is, what possible reasons are and how to test for the reason before we do a repair.

Problem

The wheel on pivot #4 exhibits extreme tread wear when compared to the other wheels.

Wheels all were retreaded on xxx. Wear was noticed at the 7th match at Drexel and replaced. Wheel had only yyy minutes of wear.

Wear was even across the entire tread.

Thesis: Brake Jumper on Jaguar

The brake jumper is installed on the drive cRio. This means every time the robot changes direction the wheel will stop, dragging the tread. The other wheels would continue to spin along the carpet.

Tests and Results

Look at the drive Jaguar for that pivot.

Thesis: Pivot Steering Chain

The chain that controls the steering is loose, this would lead to wear because of ?????

Thesis: Loose Axle Bearing

The axle bearing collar was loose, this would allow the wheel to slide back and forth across the axle. This would lead to wear because of ???????

Thesis: Position Sensor Mounted Differently

The magnet for the Cherry Position Sensor is mounted differently than the other three. This would cause wear because ?????

Thesis: Different Drive Code

There is different drive code for that pivot. This would cause wear because ?????