Introduction: How to Make a Mini Battlebot

Picture of How to Make a Mini Battlebot
Battle Bots are normally pretty cool, and I've always been wanting to make one and thought I'd have my go in making a mini one. This is not exactly a great bot, but will actually work and especially good for like a first time type thing. It's really easy, not awesome but easy.

This is also my first instructable and also I've already created it, so I kind of have to show you what I have, and can't really show the steps very well
But hope its still okay

Also I made this while I was kind of tired so some things might not make too much sense.

Step 1: Materials

Picture of Materials

A fair few materials is needed for making this project most of which can be found at home, or a lot I've just bought from eBay at a fairly cheap price.

Materials:
Motor (around 12 volts)
small saw blade
lots of wires
2 hacked servos (there are many instructables on hacking these on the net)
6 volt battery clip
12 volt battery clip
wheels
aluminum sheet
small screws
small bolts
radio receiver
radio transmitter
2 hinges
superglue
Switch

Tools:
preferably a drill or mini dremel tool
Tin snips
screw drivers
pliers
pop rivets with some rivets

Step 2: Wheels and Servo

Picture of Wheels and Servo

Firstly you need two average sized servos, these can be bought from eBay or many other places, they also need to be hacked so that they turn in complete rotation when used.
One this has been done (you can Google how to hack them) you need to screw on the servo horns on at the top. with them in place nicely.
The wheel can now be glued, preferably with super glue onto the servo horns, this keeps them in place. Pretty much any smallish wheel sizes can be used

Step 3: The Body

Picture of The Body

This was probably the hardest part, the body can be made however you wish, on my instructable i used a triangle based body, this made it strong and also wasn't too hard to do.
First a sheet of metal had to be cut out about the size of about
10x21 cm
using the piece of aluminum sheeting.
You then need 4 small pieces of aluminum sheeting at about
4x1 cm
for holding the servos into place
and lastly a backing part of two sheets of aluminum at
9x4 cm
With these cut out, its time for placing the parts together

Step 4: The Body, Putting Parts Together

Picture of The Body, Putting Parts Together

Firstly with the base laid on the ground, we need the four small 4x1 cm pieces, with them they must be bent at about 1 cm in, from one side of the aluminum piece, this makes an L shaped piece, the bottom part of the L shape must then have holes drilled into them
Anywhere near the middle should be fine (of the L piece).

on the top part of the L shape pieces of aluminum >L that part, must also have two holes drilled into them, they should be spread out apart enough so that the servo holes will be able to fit.
Holes must then be placed onto the bottom base sheet metal (10x21 cm) sheet metal, these holes need to be placed nicely and equally apart so that it holds the servo in place, and so that its near the back part of the base.
For mine I placed the two L shapes at 3.5cm and 8.5 cm from the back of the base, they were also about a Cm in from the side so that the servo could fit snugly while still over hanging the edge nicely.
Now just simply pop rivet the pieces into place and you have the start of the body.

Step 5: The Body, the Back Part.

Picture of The Body, the Back Part.

For the back part of the body we need to create a little space for the blade to go, with the 9x4cm cut outs of aluminum, we need to bend just under a centimeter in of these pieces of metal on both sides, that creates a kind of U or C or [ shaped bend, so that the bottom part can be connected to the base and the top can be connected to the roof of the body. Two holes should be equally placed on the top and another two holes on the bottom parts of the C shaped or [ shaped piece of sheet metal.
Another two holes should then be placed on the actual base of the sheet metal too line up with the backing of the two U/C/[ shaped metal piece.
These pieces should be placed on the edge of either side of the base and nicely pop riveted into place.

For the last part, you need to connect a 10 x 4cm piece of aluminum cut out, and shape it so it fits around the motor, with some space at the end, kind of like the shape of a ? this allows the curve piece to connect onto the top part of the [ shaped aluminum piece while also allowing enough room for the motor (can be soon on the photo 3 and 4)
this in put in place with a drilled hole to the top part of the back of the [ shaped piece, and also another hole needs to be placed at the end of the sheet metal so that it can tightly grip onto the roof.

Step 6: The Body, Front Part

Picture of The Body, Front Part

Now you need to do the front part of the body, this is fairly easily done by first getting the two hinges, these will be placed on either side of the front of the base. A hole then needs to be drilled on the base, where you can see the holes on the hinges. Once done you can then just pop rivet the hinges into place, and you're done with the bottom body :D congratulations

Step 7: Top Part of Body

Picture of Top Part of Body

For the top part, a sheet of aluminum needs to be cut out at about
21x10 cm
for the back part, using the tin snips, a rectangle needs to be cut out so that the blade of the saw can fit nicely within, with A LOT of clearance, my rectangle used a 8x2 cm box (look at the second picture) placed at the exact middle of the top sheet.
the front bit then needs to be measured so that the holes can be places from the hinges, so that the hinges fit on each side, and it allows the top part to swing open an shut. Drill the 4 holes for the hinges and then hold this in place with rivets.
With the motor holder created earlier for the base part find where the hole lines up of the ending part so that a hole can be created on the top part, this is used so that a bolt can tighten up, and this tightens the motor onto the roof or the body.
with that hole placed correctly, you can now pop rivet the hinges onto the top base.

4 holes also need to be made for the top part so it connects nicely onto the [ shaped thing, bolts will later be placed here to connect these parts together

Step 8: Electronics

Picture of Electronics


With that done its time to start adding the electronics for the car, to make it movable using the remote control, first part is to connect the servo onto the L shaped things used for the base, its probably best to use the screws that came with the servo, although you can also use bolts instead
This needs to be connected onto channel 1 and 2 of the receiver, with also the battery pack of the receiver.
Everything can then be sticky taped onto the base of the car

Step 9: Weapons

Picture of Weapons


The weapons can be changed to however you like, I just connected the blade onto a 12 volt motor, This isn't the greatest weapon ever, but the speed is pretty quick and I probably still wouldn't touch it, you can connect it how you like, with the blade I bought, I glued two pieces of plastic over the huge hole on the blade, using super glue.
With that I placed a small hole in the middle of the plastic where the motor was connected right though. The motor was then placed onto the motor holder of the base part.

Step 10: Motor Wiring

Picture of Motor Wiring


The motor can be wired fairly easily, just by connecting the two wires onto a battery with a switch in between (note the picture is a 6 volt battery clip, but you can up it to 12 volts to make it much faster), this will mean once the switch is on then the motor will start spinning and so will the weapon, then the other switch can be turned on for the receiver and this will allow the wheel to be able to turn using the transmitter.

Step 11: The Ending

Picture of The Ending


Lastly bolts need to be placed for the back part to keep the top on properly, and also for the motor part so the motor gets pushed against the top of the base, this then pretty much completes the battle bot :D you should now be able to drive it around and crash the back part into things,
As i said its not the greatest thing, but its still pretty cool, also if you would like me to elaborate more on any part, just tell me

Comments

Yorgy (author)2016-08-18

I added a flamethrower to mine! To make it I went to www.instructables.com/How-to-make-a-flamethrowing... I just removed the pumpkin.

srotondi18 (author)2011-01-31

Ya I tries one and it took three tries to cut a paint stirrer in half ,but would you be able to help out with a rc flamethrower attachment?

calvin_evird (author)srotondi182011-01-31

Yeah its a bit like that, takes a few cuts, but it does go through, guess the biggest problem is keeping everything small makes it hard to make a strong enough cutting tool.
A flamethrower attachment would be heaps awesome as to have on the RC car, I would be happy to help as much as I can although I will admit I'm not too great at this.
I would probably suggest trying to keep it simple by using something like the usual spray can an lighter type thing, even if you tried something like this instructable
https://www.instructables.com/id/How-to-make-a-flamethrower-out-of-a-Axe-can/
and just adding an un-hacked servo to press the spray can bottle down to start the flamethrower.
It will mean you'll need an extra channel on the radios though

Yorgy (author)calvin_evird2016-08-18

For the flamethrower there is an instructable for that at www.instructables.com/Id/How-to-make-a-flamethrowing-Jack-O-Lantern/?ALLSTEPS

ellisgt406 (author)2016-05-25

I have been wanting to make my own battlebot, but I don't have the proper equipment

toxsined pikachu (author)2016-05-23

how can you conect a xbox360 controler

Elliotbarbo (author)2015-09-17

and i can't find a servo that is the right size

Elliotbarbo (author)2015-09-17

is there a place i can buy a hacked servo?

Chikpeas Brother (author)2013-06-27

If you're going to use that in a fight, I highly reccommend covering the sides. As it is right now, a competitor could easily cut through your motors. Otherwise, a great bot! Thanks for posting.

dudeman6457 (author)2011-09-22

how could you make the robot steer and drive?

calvin_evird (author)dudeman64572011-09-22

hii, as the saw is connected straight to the battery with a switch once the switch is turned on, the saw will always run full time unless the switch is turned off or battery runs out.
The steering is a little weird, how it works is one servo is connected to the trigger while the other is connected to the steering part. so having both on full will make the bot go forwards, while having only one full while the other stopped or not as much, will make the bot turn in that direction since only one wheel will be turning.

Its a bit different to normal bots but it made the build so much simpler

dudeman6457 (author)2011-09-22

and can u make the saw run full time?

srotondi18 (author)2011-01-30

Would the motor be strong enough to power the saw blade so that it can cut through wood or thin metals? If so where do you get one?

calvin_evird (author)srotondi182011-01-30

Hi, unfortunately not really, i have tested it on an aluminum cans an it does cut it but the blade I used is fairly thick, and the motor has not much torque so it slows to a stop fairly quickly.
I would probably recommend trying a different motor or at least some sort of gearing for it, but that does make things a little less simple.
I would say try testing out a drill motor as I would guess it would work best, especially an old or broken portable one.
You could also try a hair dyer motor as I hear there good but never tried one.
Hope this help if you find one that works great, It would be great if you post about it
Thanks :D

sparkstriff (author)2011-01-17

Can I please ask for the dimensions of this robot?

calvin_evird (author)sparkstriff2011-01-18

Sure man umm from the side view
just the chassis is about 21 cm wide and height of about 7.5 cm
although full height with the blade and wheels come to about 12 cm with I think is the depth to be about 10 cm
Hope this helps
Thanks

lemonie (author)2010-11-27


This is a nice build, you've got a smaller version of some of these heavyweight 'bots.
If you're fighting with this, what is the defensive strategy to protect the wheels? They look vulnerable.

L

calvin_evird (author)lemonie2010-11-27

Thanks, that's what I was looking for to make a smaller version of the bigger bots.
Since it's using servos its pretty slow, so the defense on the wheels are fairly low except for pretty much trying not to get it hit. Changing the wheels to something stronger might be a better idea, although in later builds I might flip the servos around so that the wheels are inside the body and then that way it should be a lot less vulnerable.

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