Dolphin e50i track skipping

[alBeen]

Hi everyone

new forum user here. I have an e50i which is only 1.5 years old. Recently it started skipping its track. I have already replaced the rear roller (and its related wheels) as well as the drive gear and the tracks itself. However it's still skipping.

It seems to me like that when looking at the robot when it's upside down the right hand side of the rear roller is not properly aligned, you can kind of see this alignment I'm referring to in the static video thumbnail. The right side of the can move slightly if you use your hand, however the left side doesn't have the same movement. If i flip around the roller the problem remains at the right hand side. Maybe this is normal but the track skipping is definitely not normal!
Can anyone help?

 

[JoyfulNoise]

Check the larger front drive wheels. There is a plastic bushing that fits in the wheel hub. My guess is that the wheel hub, the bushing, or both, are no longer concentric smooth circular openings but have worn down to a point where they are slightly oval shaped. That is enough typically to cause slack on the trends and cause the treads to skip.