Dagu Wild Thumper 6WD All Terrain Chassis (Aluminum, 75:1)

The Dagu "Wild Thumper" 6WD All Terrain Chassis (Aluminum, 75:1) is made from 2mm thick anodized aluminum plate with stainless steel and nickel plated brass fittings. It is provided with 6 powerful steel geared motors with Encoder on two separate wheels, spiked tractor tyres and a "Super Twist"suspension system to keep all wheels on the ground. This chassis will let your robot go almost anywhere. "Outdoor search and rescue robot research" is not only an important subject in universities, but also leads to the development direction of military applications. Each unit comes pre-assembled. Wheels only need to be fitted with supplied allen key.

This rugged, 6-wheel-drive chassis from Dagu Electronics is designed to excel at traversing rough terrain and steep inclines, making it a great platform for any robot that needs to perform tasks in a complex outdoor environment. It features six powerful DC motors with brass brushes and 34:1 or 75:1 steel gearboxes that drive large (120mm diameter) spiked tires, and a unique “super-twist” suspension system acts to keep each wheel in contact with the ground for maximum traction, even when driving over uneven or bumpy surfaces. The suspension can be adjusted to suit different loads and conditions. The chassis is made from a 2mm-thick corrosion-resistant anodized aluminum plate, all of the nuts, bolts, and screws are stainless steel, and the brass fittings and suspension springs are nickel-plated.

When powered at 7.2 V, the version of the chassis with 34:1 gearboxes can reach a top speed of approximately 7 km/h (4.5 mph), and each motor has a stall torque of roughly 5 kg-cm (70 oz-in). At the same voltage, the version of the chassis with 75:1 gearboxes can reach a top speed of approximately 3 km/h (2 mph), and each motor has a stall torque of roughly 11 kg-cm (150 oz-in).

Using the Chassis:

The chassis’ aluminum plate has 4mm holes spaced every 10mm, providing plenty of options when it comes to mounting your control  electronics, sensors, and additional hardware, and with a maximum recommended payload of 5 kg (11 lb), this platform is capable of  carrying a lot of cargo! Two compartments in the chassis have been designed to hold 7.2V sub-C battery packs (not included) that are  commonly used in RC cars. A total of four such battery packs can fit in these compartments. The interior of the chassis also features  convenient screw terminals for connecting your battery and motor driver leads. The motor leads are pre-connected to these screw  terminals.

This is a differential-drive chassis, meaning that turning is accomplished by driving the motors on the two sides of the platform at  different speeds. The three motors on each side of the robot are wired in parallel, so only two channels of motor control are required  to get this chassis moving. The motors are intended for a maximum nominal operating voltage of 7.2 V (2V minimum), and each has a  stall current of 6.6 A and a no-load current of 420 mA at 7.2 V. Since the motors will briefly draw the full stall current when  abruptly starting from rest (and nearly twice the stall current when abruptly going from full speed in one direction to full speed in  the other), we recommend a motor driver capable of supplying the 20A combined per-channel stall current of these motors at 7.2 V.

Specification:

• Encoder On Two separate wheels  

• Rated voltage: 6V DC (Min. 2V- Max. 7.5V)

• Stall current: maximum 5.5A

• Maximum Locked current of 5.5A

• No load current per motor: 350mA

• Motor RPM: 10000 + / - 5%

• Gear Box speed ratio: 75:1

• Output shaft speed: 295rpm + / - 5%

• Stall torque is 4Kg/cm

• Locked-rotor torque: 4Kg/cm

Features:

• Maximum load: 5kg

• Gear ratio: 75:1, Silver colour

• Rated voltage: 6V DC (Min. 2V and Max. 7.5V)

• No load current per motor: 350mA

• Spiked tractor tyres

• "Super Twist" suspension system

Chassis Options:

• Silver (chrome-colored hubs), 34:1

• Black (metallic-red or gold hubs), 75:1

Resources:

• Modifying the Wild Thumper to use motors with encoders