Sneak preview of T'REX robot tank chassis prototype
June 21, 2013
Inspired by the Rip Saw tank, I have designed a new robot chassis called the T'REX tank chassis. I finally received all the parts for the prototype chassis. The entire chassis including gearboxes and tracks are all metal. The tracks have been anodized a gun metal grey colour.
Check out the ground clearance on this beast! It can go over very rough terrain without getting stuck.
Body Height: 60mm
Ground Clearance: 70mm
Total Height: 130mm
Nominal Current: 3A
Stall Current: 11A
The T'REX motors are 12V and work best from a 3S LiPo 5000mAh or better. Each motor has a stall current of 11A so you need a beefy motor controller. The chassis included mounting holes for either a Wild Thumper controller or the new T'REX robot controller.
The new T'REX robot controller features:
- Arduino compatible with ATmega328 processor @ 16MHz.
- USB, ISP and FTDI sockets for easy programming and bootloader burning.
- Input voltage from 7V to 30V with 6V @3A servo power in high voltage mode.
- Input voltage from 5.5V to 8.4V with servos powered directly from the battery in low voltage mode.
- Battery monitor on A3.
- 5V @ 2A output for powering external controllers (ideal for Raspberry Pi and other 32bit controllers).
- Dual FET "H" bridge rated at 20A per channel (40A peak).
- PWM controlled electronic braking independant for each motor.
- PWM frequency of 32kHz for silent motor control.
- PTC self resetting fuse for each motor.
- Hall effect, factory calibrated current sensor for each motor.
- 6x servo outputs (6V or battery voltage depending on power mode).
- Built in 3-axis accelerometer with selectable 1.5G or 6G sensitivity.
- I2C interface with voltage translation circuitry, works with 3.3V and 5V devices (ideal for Raspberry Pi and other 32bit controllers).
- Bluetooth interface socket for optional bluetooth interface (ideal for mobile phone control).
- Power, RX, TX, SDA, SCL and motor fault indication LEDs.