I want to make a weapon with brushless motor

**Rahulvyas** · 2nd November 2012, 05:18

Hello,
I have a outrunner brushless motor(1000kv) & want to make a powerfull and good weapon out of it for beating and defeating another 5-6kg robot.
Any idea?
Also how Do I attach a pulley and belt to it?

Thanks
Rahul

**Eventorizon** · 2nd November 2012, 12:47

What are the exact motor details? Do you have a link to say the data sheet, that will help in deciding on some key factors.

What kind of spinner do you want? They each have their own pros and cons so I would look at those first and see what you can do with your budget and skills.

The main point is that you will have to gear down the motor to some degree. For drum spinners it can be as little as a 2:1 ratio. My machine Conker runs a 3.33:1 ratio, others run more. Inertial XL Runs a 4:1 ratio but the disc is 300mm dia where as Conker's is only 200mm.

**psychostorm** · 2nd November 2012, 13:10

It's a bit of an ethical or moral dilemma in giving this advice to people entering competitions we know little about.

We'd love to tell everybody everything but, without knowing what safety precautions are in place, we can't recommend what is safe or harmless to other people.

Particularly, a brushless spinner. Those things are lethal!

**typhoon_driver** · 2nd November 2012, 13:14

where is the machine going to be run? There isn't much you can do with a brushless beyond a spinner and even then not all brushless are suited for the job.

For a first machine, stick to a rammer. You will struggle enough to get that running let alone with a weapon system in the mix as well.

**Rahulvyas** · 2nd November 2012, 15:05

Rammers- I made my first robot with a rammer after which I made a front wedge robot. They work good with my 29$ motors(without any external gears) DRIVE MOTORS NOT THE BRUSHLESS ONES.. But I wanted to make a very CHEAP use of my brushless motors which I have.

These brushless motors I have
http://stores.servosandstuff.com/-strse ... Detail.bok

**typhoon_driver** · 2nd November 2012, 20:07

Where will the robot be run?

**Rahulvyas** · 3rd November 2012, 04:54

In a local school competition.

**Ellis** · 3rd November 2012, 09:20

I think Gary is asking because it is likely that the arena you will be fighting in won't be safe for a spinner. To give you an idea, the RoboChallenge arena is a completely sealed bullet proof box, with 10mm thick polycarbonate walls.

It wouldn't be right to advise you on how to build a weapon with the potential to harm (severely) you or anyone around your robot.

**typhoon_driver** · 3rd November 2012, 09:38

Precisely. I don't think you will find much use for the brushless motor as they are pretty much only useful for building spinning disc weapons. Basically machines too dangerous for a small scale competition without a proper arena.