Hexabot: Build a heavy duty six-legged robot!

Step 2: Materials

Here's a list of the materials you'll need to construct the robot:

-41 feet of 1" square steel tubing, 0.065" wall

-14 feet of 2" x 1" square rectangular steel tubing, 0.065" wall

- A 1" x 2" x 12" aluminum bar

-4 5" 3/4-10 bolts

-2 3" 3/4-10 bolts

-6 2 1/2" 1/2-13 bolts

-6 1 1/2" 1/2-13 bolts

-2 4 1/2" 1/2-13 bolts

- 4 3/4-10 standard nuts

- 6 3/4-10 nylon insert lock nuts

- 18 1/2-13 nylon insert lock nuts

- 2 3 1/2" ID 1/2-13 U bolts

- Small bolts for set screws (1/4-20 works well)

- Washers for 3/4" bolts

- Washers of 1/2" bolts

- 2 electric wheelchair motors (these can be found on ebay and may cost anywhere from $50 to $300 each)

- Some scrap wood and metal

- Microcontroller (I used an Arduino)

- Some perfboard (a proto shield is nice if you're using an Arduino)

- 4 High current SPDT relays (I used these automotive relays)

- 4 NPN Transistors that can handle the voltage put out from the battery (TIP 120's should work fine)

- 1 high current on/off switch

- A 30 amp fuse

- Inline fuse holder

-14 gauge wire

- Various electronics consumables (resistors, diodes, wire, crimp on terminals, switches and buttons)

- An enclosure to house the electronics

- 12V sealed lead acid batteries

Additional components you may want to add (but aren't necessary):

- A chair to mount to your robot (so you can ride it!)

- A joystick to control the robot

Comments

[ducttape99]

How fast does it move with 24 V?

[rpantaleo]

Never tried it. Probably about twice as fast?

[deobomb]

can this be made with just 2 batteries 2 motors and 2 seprate switches for the motors?

[rpantaleo]

Yes!

[manojkumar6027]

which micro controler is used for this project and also mention the number of micro controler
circuit board for connections

[rpantaleo]

I used an older version of the Arduino Uno for this project. I used 4 digital input pins for the main control circuit. 

[manojkumar6027]

thanxs

[manojkumar6027]

2 3" 3/4-10 bolts what is this means

[rpantaleo]

2 bolts, 3 inches in length, 3/4 inch diameter, 10 threads per inch.

[manojkumar6027]

thanxs dude

[karankochhar13]

can we use other types of moter like 'a car starter or moter used in wiper in car'

[rpantaleo]

A car starter motor would require some sort of gear reduction to reduce the speed and increase the torque.

A windshield wiper motor would work but the torque output would be too low for you to ride on it.

[aafram]

you can use 24V and PWM to control the speed of the robot as well.

[rpantaleo]

Yes you can. I used relays mainly due to budget constraints.