spinner motor help

**RogueTwoRobots** · 5th June 2011, 16:06

In that second brushless motor you linked to, there is a guy who has posted the following review:

Will not be using this item for a couple of weeks yet, will leave a review when I do
and then proceeds to give the item three stars.

Don't some people realise that reviews and the product score form an important part of research for people interested in buying? When every other review gives it five stars, why give it three stars and tarnish the overall score when you haven't even used it yet and plan on reviewing it in a couple of weeks? Jeez, some people are born with pish for brains!
Sorry, rant over.

Anyway, I reckon you're probably aware of the fact Ben but just to clarify, the Graupner motor won't be able to be used with the brushless ESC you linked to and the servo board won't be able to control the brushless motors.
The servo board will probably even be too weedy to control the Graupner motor.

**death robotics** · 5th June 2011, 16:09

Originally Posted by PJ-27

@Lian, haha that's awesome!

Thats what you can expect from a 3-time Battlebots MW champion

**Laser** · 5th June 2011, 17:06

That guy did ruin the review.
Anyway..
I looked through my box of many things and found a 15a brushless speedo and a jp outrunner brushless.
That would work well on 11.1v. The thing is that its broken. so i would have to get a new one.
link http://www.galaxymodels.co.uk/detail.as ... C608%7C615
for armour of my kilobot I found some 4mm Lexan (is that the same kind of stuff as polycarb?)
the actual weapon disk would be run by a 1:1.5 ratio and will be a 30x6mm hardened steel bar.
It will look like NST and I think I will call it KLB.

**RogueTwoRobots** · 5th June 2011, 17:11

If my memory serves me correctly, Lexan is just a brand name for polycarbonate (as is Makrolon).

Considering NST stands for Nasty Spinny Thing, does KLB stand for anything? Or is it just an abbreviation of KiLoBot?

Look forward to seeing it once it's built.

**Mouldy** · 5th June 2011, 17:12

@ craig;

Brushless motors in large robots are still hit and miss at times... but when they do work its pretty obvious there far superiror to any brushed setup.... brushed still has the edge on reliability (at the moment... im working on it) lol...

Anyhow...

Brushless motors should be quite a good option for beetles, they have been proven to be reliable in this weight classs... but obviously to work out what motor you want, you need to know the following;

Weight of weapon
Gear ratio
Budget
Required performance.

If your on a budget and you disc/bar whatever isnt going to be to heavy... you could try a setup like this :
http://cgi.ebay.co.uk/2204-C2822-KV1200 ... 4aaba4fbd9

If you can spend a bit more, look at scorpion motors and castle creations esc's (two brands i rate highly. and use myself) Axi motors are also really good.

Remember... it wouldnt be a good idea to run your bar directly attached to the motor... you will want to belt drive it or something to take the shock away from the motor.

**Laser** · 5th June 2011, 17:20

@Dave the motor is running using pullys on a 1:1.5 ratio.
My budget for the motor and ESC is Â£60
@Jamie KLB does stand for KiLoBot

**craig_colliass** · 5th June 2011, 19:07

I don't know why I thought the robot class concerned was featherweight, I must be tired. (or OLD) You are quite right Dave in this class brushless would be the way to go,
On the subject of feather spinners the problem with brushless is keeping the robot in the arena! I hope to make a Kilo bot too, but first I want to see the arena finished and at a show then I will make something fun and totally useless.