XiaoR Geek Smart Robot Car Chassis Kit Aluminum Alloy Big Tank Chassis with 2WD Motors for Arduino/Raspberry Pi DIY Remote Control Robot Car Toys - Free Tools (Black)

I really like how the tank is built. It has lots of space for adding things on. I built a custom acrylic case that can mount a pi, controller, and 2 battery packs under the top. This leaves even more room for things to get mounted to the top.The intention I have, because I'm still working on it, is to use this with a raspberry pi 3 b+, using a L298N controller to work the motors. I'm using 2 18650 batteries for the controller, 2 for the pi. That part works great. I had to work through figuring out how to get PWM working, using Python. That's done. It works. The only issues I've had so far, is that the tracks broke pretty easily when I was assembling it, and that the drive wheels keep coming off both sides, over time, when it's not even running on the ground, track to surface. I keep putting them back on, trying to align them so they're pretty straight, screwing in the screw on the drive wheels, to the shaft. Not long after using them, they come off again.I guess I may have to drill a small hole into the screw hole where the drive wheel is to try and make sure it stays locked on there, but I wish there was an easier alternative. All in all, it's ok, but for $79, I was hoping it'd be just a little more durable. When I say durability, again, it's all related to the tracks and the wheel driving them. The rest is very solid.

The quality control is awful. 2 of the m6 machine screws that hold the track guides in place were mangled to the point where they would not thread into the provided locknuts. Luckily I have an assortment of fasteners and was able to source one. Be prepared to make a trip to the local hardware store. There seems to be a track alignment issue with one side of my chassis and no matter how much finagling loosening / retightening etc. I do it won't align properly. The track still spins but at a certain point in the rotation the drive wheel grinds into the plastic track which will inevitably cause wear until it breaks at which point this thing is useless. Aside from it being a really cheap toy that's marketed as a decent chassis it works as intended and I'll use it for now until I can find something better or it breaks.

For the price this is a great kit. Everything fits together, the motors that come with the kit are powerful enough but run fairly slow. Standardized mounting makes replacing the motors very easy though. The tracks are great for rough surfaces but struggle on smooth floors. Very flexible mounting, I was able to relocate some of the panels with no problem. Plenty of screws provided.

This chassis is stable and in good quality. The chassis is metal, with holes to settle the Raspberry Pi. There are two motors control each side of the track. The speed of the track is not so fast with the 5V input signal.

Overall design and construction seems pretty sturdy, but my kit was missing three screws and one of the wheels was missing the ball bearing inserts, making it unusable.

Didn't receive any set screw for drive sprocket, had to improvise. It required a bit of tinkering to insure the track was in a straight line and would run smoothly. Directions were vague. Motors just had to blue wires polarity was not clearly labeled, none of this was a deal breaker.

Over priced and under powered

Actual chassis was shipped packed and went together really well but the motors lack torque.