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It should take aroun First, make sure your kit has all the required materials. +![All parts](./_images/assembly/all_parts.webp) + In the box: | Item | Quantity | Picture | | ---- | ---- | ---- | -| Circuit board | 1 | ![]() | -| LD-20 lidar | 1 | ![]() | -| Orange wheels | 2 | ![]() | -| Motor with encoder | 2 | ![]() | -| 18650 LiIon battery, 5000 mah | 1 | ![]() | -| USB-C to C cable | 1 | ![]() | -| Front skid | 1 | ![]() | -| Motor mount | 2 | ![]() | -| Cable bag | 1 | ![]() | -| Small parts bag | 1 | ![]() | +| Circuit board | 1 | ![Circuit board](./_images/assembly/circuit_board.webp) | +| LD-20 lidar | 1 | ![Lidar](./_images/assembly/lidar.webp) | +| Orange wheels | 2 | ![Two orange wheels](./_images/assembly/wheels.webp) | +| Motor with encoder | 2 | ![Two motors](./_images/assembly/motors.webp) | +| 18650 LiIon battery, 5000 mah | 1 | ![18650 battery](./_images/assembly/battery.webp) | +| USB-C to C cable | 1 | ![USB C to C cable](./_images/assembly/usb_cable.webp) | +| Front skid | 1 | ![Front skid](./_images/assembly/front_skid.webp) | +| Motor mount | 2 | ![Motor mounts](./_images/assembly/motor_mounts.webp) | +| Cable bag | 1 | ![Cable bag](./_images/assembly/cable_bag.webp) | +| Small parts bag | 1 | ![Small parts bag](./_images/assembly/small_parts_bag.webp) | In the cable bag: | Item | Quantity | Picture | | ---- | ---- | ---- | -| 4-pin JST GH 1.25mm straight across cable | 1 | ![]() | -| 6-pin JST PH 2.0mm reversed cables | 2 | ![]() | +| 4-pin JST GH 1.25mm straight across cable | 1 | ![Motor cables](./_images/assembly/motor_cables.webp) | +| 6-pin JST PH 2.0mm reversed cables | 2 | ![Lidar cable](./_images/assembly/lidar_cable.webp) | In the small parts bag: | Item | Quantity | Picture | | ---- | ---- | ---- | -| Motor attachment shims | 2 | ![]() | -| Motor spacing shims | 2 | ![]() | -| Wheel spacers | 2 | ![]() | -| M3-8 machine screw | 3 | ![]() | -| M2.5 hex wrench | 1 | ![]() | +| Motor attachment shims | 2 | ![Motor attachment shims](./_images/assembly/motor_attachment_shims.webp) | +| Motor spacing shims | 2 | ![Motor spacing shims](./_images/assembly/motor_spacing_shims.webp) | +| Wheel spacers | 2 | ![Wheel spacers](./_images/assembly/wheel_spacers.webp) | +| M3-8 machine screw | 3 | ![Machine screws](./_images/assembly/bolts.webp) | +| M2.5 hex key | 1 | ![Hex key](./_images/assembly/hex_key.webp) | ## Motor Subassembly +Insert a motor cable into one of the motors. Note the ridges on the connector, it can only be installed in one orientation. + +![Cable installed in a motor](./_images/assembly/cable_in_motor.webp) + +Take a motor and place it in a motor mount. + +![Motor in motor mount](./_images/assembly/motor_in_mount.webp) + +Add a motor spacing shim on top of the motor. + +![Motor with spacing shim installed](./_images/assembly/add_motor_shim.webp) + +Repeat with the other motor, making sure the second assembly is mirrored to the first. + +![Motor with spacing shim installed](./_images/assembly/both_motor_assemblies.webp) + ## Body Assembly -## First Power On +At the base of the circuit board, there are cutouts for the motor mount to slot into place. +Insert the circuit board into the gap... + +![Inserting the circuit board into the motor mount](./_images/assembly/before_mounting_motor.webp) + +... then guide the other end of the motor mount up through the slots in the PCB. + +![Guiding the mount up into the board](./_images/assembly/after_mounting_motor.webp) + +Place a motor attachment shim over the parts of the motor mount exposed above the board. +Push the attachment shim up and into place, locking the motor into place. +The hole in the attachment shim should line up with the bolt hole in the circuit board. + +Attachment shim placed +Attachment shim pushed up + +Repeat with the other motor. + +![Both motors attached to the board](./_images/assembly/both_motors_attached.webp) + +Flip the robot over. +Insert the motor cables into their connectors. + +![Attaching the motor cables](./_images/assembly/attaching_motor_cables.webp) + +Insert the LiDAR cable into the bottom of the LiDAR. + +![Inserting LiDAR cable into LiDAR](./_images/assembly/add_lidar_cable.webp) + +Place the LiDAR on top of the circuit board, making sure the cable passes through the hole. + +LiDAR on top of circuit board +Cable coming out the other side + +Using the provided hex key, attach the LiDAR to the rover's body using the bottom two mounting points. +For now, leave the third screw unattached. + +![Attaching the LiDAR using the machine screws](./_images/assembly/screw_in_lidar_back.webp) + +On the back, insert the LiDAR cable into its connector. + +![Attaching the LiDAR cable](./_images/assembly/attach_lidar_cable.webp) + +On the front of the rover, there are cutouts for attaching the skid. +Line the skid up with the cutouts, and push it on. +Use the final screw to attach the front skid. + +Front skid before attachment +Front skid after attachment + +Insert the battery into the back of the rover. +Take note of polarity - the positive side of the battery (the end with a bump) goes towards the left. + +Empty battery holder +Battery holder with battery + +Congrats! Your robot is assembled! + +![Completed robot](./_images/assembly/complete_robot.webp) ## Care for Your Rover +The rover has a USB C port which you can use to charge the battery. +Two red status LEDs, directly below charging port, show the charging status. + +The first LED, labeled CHARGING, lights up when the battery is actively being charged. +Once the battery is fully charged, this light will turn off. + +The second LED, labeled PWR GOOD, lights up when a valid power supply is attached. + > [!WARNING] > **Never charge Little Red Rover unattended.** > -> If something goes wrong during the charging process, lithium batteries, like the one contained in the rover, are a serious fire hazard. If the battery becomes hot, smokes, swells, or gives off an odor during charging, immediately stop charging and dipose of the battery safely. +> If something goes wrong during the charging process, lithium batteries, like the one contained in the rover, are a serious fire hazard. If the battery becomes hot, smokes, swells, or gives off an odor during charging, immediately stop charging and dispose of the battery safely. ## Next Steps