FingerTech 'Cobra' Mini-Sumo Chassis (no PCB, unassembled)
  (Enlarge)  

FingerTech 'Cobra' Mini-Sumo Chassis (no PCB, unassembled)

Price: 144.14 CAD
List Price: 163.55 CAD
109.07 USD 92.18 EUR
In Stock: 56

• Development of the new Cobra kit is taking longer than projected, so in the meantime you can purchase this package that includes the best parts of the Cobra R5.

• Designed to be a competitive entry into the masters class of mini-sumo, this chassis has the ability to beat those big-wheeled servo bots every single time.

• Includes 4WD Silver Spark motors, four high-traction mini-sumo wheels, stainless steel scoop, heavy steel ballast, screws, wrenches, stand-offs,  and hex stand-offs for attaching your control board.

• Does NOT include: control board, motor controllers, line or opponent sensors, battery. Requires gluing motors to metal plate.

• If you would still like to be informed when the new Cobra kit is available, sign up for email notification on the original Cobra product.

Quantity:
-
+
  • Description
  • Videos
  • CAD Files
  • Reviews
• Development of the new Cobra kit is taking longer than projected, so in the meantime you can purchase this package that includes the best parts of the Cobra R5.
• Designed to be a competitive entry into the masters class of mini-sumo, this chassis has the ability to beat those big-wheeled servo bots every single time.
• Includes 4WD Silver Spark motors, four high-traction mini-sumo wheels, stainless steel scoop, heavy steel ballast, screws, wrenches, and hex stand-offs for attaching your control board.
• Does NOT include: control board, motor controllers, line or opponent sensors, battery. Requires gluing motors to metal plate. (Shoe-Goo works great!)

Dimensions (of Cobra R5 - this kit does not include the 0.0625" thick red pcb):
The Cobra conforms to the standard mini-sumo ruleset. Most events uses these dimensions, but always check with your event organizer to make sure.
Width: 9.9cm (3.90")
Length: 9.75cm (3.84")
Height (ground to top of standoff): 3.77cm (1.48")
Weight: 333grams (11.75oz) - Maximum allowed in competition is 500g (17.63oz)


Kit Includes:
Motors:Four 50:1 Silver Spark Gearmotors to be glued in place as shown above.
Wheels:Four FingerTech Mini-Sumo Wheels.  Shore A20 polyurethane - the highest traction mini-sumo wheels available.
Scoop:0.020" stainless steel angled scoop
Steel Ballast:An underweight mini-sumo is at a disadvantage!  This steel ballast keeps the center of gravity low.
Screws:Four 6-32x0.375" screws for mounting the scoop, ballast and stand-offs.  Four for securing circuit board to top of standoffs.  Two hex wrenches included for tightening screws and setscrews. 

Requires:
Battery:The chassis has a spot to accommodate a 44x24x29mm (1.75x1.15x1.15") battery.  Our Galaxy 7.4V 300mAh or Galaxy 11.1V 300mAh fit perfectly and will run the robot for several matches.  Min/Max Voltage suggested for the motors: 6V-16V.
Motor Drivers:The Cobra requires two motor drivers (left and right, with two motors on each side wired in parallel). If your control board does not include motor drivers, you can use two tinyESCs which operate from a standard servo signal.
Control board:In the Cobra chassis kit, the brains are up to you.  We carry the user-friendly Arduino Uno's, but boards from the SumoVore, Mark III, or SumoBot will all work.  You may want to make an adapter mounting board because every control board uses a different mounting hole pattern.
Sensors:Opponent detection can be anything you desire.  Infrared emitters/sensors are most common, but ultrasonic sensors are an option too.
Common line sensors include the QTR reflectivity sensors carried by Pololu Robotics.


Orders normally ship within 1-2 days. Other Silver Spark motor ratios can be used for an additional $10 fee - please add a note in the Additional Comments section of checkout for which ratio you would like. (33:1 is the most commonly used after the default 50:1, but make sure your sensors can react fast enough to the increased speed!)

Here is a quick video showing the top speed using 50:1 Spark motors at 11.1V.
 
 
Product Reviews

No Reviews For This Product.

Click to review this product


Shopping cart  Shopping cart
0 Product(s) in cart
Total 0.00 CAD
» Checkout
Login Status  Login Status

Not logged in

» Login

credit cards