# Tri-Layer Mini Round Robot Chassis Kit ## Assemble the Wheels To start, take the two motors, four long screws, four nuts, and two black panels. Screw the two black panels onto the motors. ![adafruit_products_DSC_3398.jpg](https://cdn-learn.adafruit.com/assets/assets/000/036/843/medium640/adafruit_products_DSC_3398.jpg?1477504955) Screw the two black panels onto the motors. The metal panels go on the side with the red and black wires coming out   Have the hex nuts on the metal panel side so they dont interfere with the wheel! ![adafruit_products_DSC_3401.jpg](https://cdn-learn.adafruit.com/assets/assets/000/036/845/medium640/adafruit_products_DSC_3401.jpg?1477505036) Take the two wheels, rubber treads, and 2x small screws found in the same bag as the wheels. ![adafruit_products_DSC_3404.jpg](https://cdn-learn.adafruit.com/assets/assets/000/036/846/medium640/adafruit_products_DSC_3404.jpg?1477505120) Put the rubber treads on the wheels. This is a lot of fun!   Fit the wheels onto the white knob on the motors, they will snap nicely onto the oval center. Attach the wheels into place with the tiny screws ![adafruit_products_DSC_3405.jpg](https://cdn-learn.adafruit.com/assets/assets/000/036/847/medium640/adafruit_products_DSC_3405.jpg?1477505243) # Tri-Layer Mini Round Robot Chassis Kit ## Assemble the Chassis Take one of the black chassis layers.  All three layers are identical.   Align it on your table as shown on the left. Note that the panel **is not symmetrical** - look on the left to see that rectangle cut out? make sure its aligned as you see here!   Attach two of the brass standoffs onto the black chassis layer.   **The standoffs should be screwed into the second set of holes from the outer edge - meaning the two interior holes.** ![adafruit_products_DSC_3402.jpg](https://cdn-learn.adafruit.com/assets/assets/000/036/848/medium640/adafruit_products_DSC_3402.jpg?1477505797) **Turn over the plate**   Attach the white free-wheel into the exterior hole closest to the rectangular opening.   The white free-wheel should be on the opposite side of the chassis of the standoff. ![adafruit_products_DSC_3407.jpg](https://cdn-learn.adafruit.com/assets/assets/000/036/849/medium640/adafruit_products_DSC_3407.jpg?1477505890) **Turn over the plate again** Take your assembled wheels and fit them into the chassis layer. There are 2 slots on the black panels that you attached to your motor that should fit perfectly into the chassis layer. The metal front of the motor will be pointing toward the side of the chassis where you placed your white freewheel ![adafruit_products_DSC_3408.jpg](https://cdn-learn.adafruit.com/assets/assets/000/036/850/medium640/adafruit_products_DSC_3408.jpg?1477506025) Place the next layer of the chassis on top of the motors. _In this photo we didn't line up the second plate just like the first plate (note the off-set rectangle cut out) - this might fit for you or you might have to line them up with the same cutout to get a good fit_ The two slots on the black panels you attached to the motors should fit perfectly into the next chassis layer. This sandwiches the motors in place so they can't slip Screw in the chassis layer by attaching to the brass standoffs ![adafruit_products_DSC_3409.jpg](https://cdn-learn.adafruit.com/assets/assets/000/036/852/medium640/adafruit_products_DSC_3409.jpg?1477506283) Screw the remaining 2 or 4 standoffs into the second chassis layer.   You can put them just about anywhere as long as you get both sides. The holes circled in red are good candidates.  ![adafruit_products_one_one_one.png](https://cdn-learn.adafruit.com/assets/assets/000/125/963/medium640/adafruit_products_one_one_one.png?1699471799) [Click here if you're using the battery pack supplied in the AdaBox tutorial to learn how to finish assembling your tri-layer chassis!](https://learn.adafruit.com/adabox002/assembling-your-robot) Screw in the last layer of your chassis.   YOU DID IT! Now it's time to add electronics to your little robot friend ![adafruit_products_DSC_3415.jpg](https://cdn-learn.adafruit.com/assets/assets/000/036/854/medium640/adafruit_products_DSC_3415.jpg?1477506662) ## Related Guides - [AdaBox 002](https://learn.adafruit.com/adabox002.md) - [AdaBox 013](https://learn.adafruit.com/adabox013.md) - [AdaBox 010](https://learn.adafruit.com/adabox010.md) - [AdaBox 009](https://learn.adafruit.com/adabox009.md) - [AdaBox 012](https://learn.adafruit.com/adabox012.md) - [AdaBox 014](https://learn.adafruit.com/adabox014.md) - [Introducing Adafruit Crickit #MakeRobotFriend](https://learn.adafruit.com/adafruit-crickit-creative-robotic-interactive-construction-kit.md) - [micro:bit Crickit Robot](https://learn.adafruit.com/microbit-crickit-robot.md) - [AdaBox 008](https://learn.adafruit.com/adabox008.md) - [AdaBox 006](https://learn.adafruit.com/adabox006.md) - [AdaBox 011](https://learn.adafruit.com/adabox011.md) - [Adabox 001](https://learn.adafruit.com/adabox001.md) - [AdaBox 007](https://learn.adafruit.com/adabox007.md) - [Adafruit ISO1540 Bidirectional I2C Isolator](https://learn.adafruit.com/adafruit-iso1540-bidirectional-i2c-isolator.md) - [Adafruit Feather RP2040 with DVI Output Port](https://learn.adafruit.com/adafruit-feather-rp2040-dvi.md)