Middle weight motors

[Guest]

hi im a new roboteer and looking to build a middle weight bot. I was thinking of using two electric scooter motors (which these are already geared and have full transmission to the wheels) has anyone used these, if so could you give me there

good points
and the bad points

thanks
billy

[typhoon_driver]

Middle weight motors

have you got any pictures of them?

[Guest]

Middle weight motors

hi there gary,

i havent got them yet, having a look at my mates, they must be alright if they can make an adult go up 15mph (well so the box says lol)

[jamesb]

Middle weight motors

i have seen these scooters in action. i weight 100kg (ish) and having ridden a very good one, i think you are JUST ABOUT able to use them. it will be right on the edge as far as performance goes, you are getting near the bottom end of what i would say is useful power/speed. these would make brilliant featherweight drive, but middleweight... i wouldnt.

but then, if you can double the gear ratio and overvolt them 100%, maybe this is getting reasonable results? i imagine youd get good performance in this situation, but life expectancy would be an unknown.

hope this helps

[typhoon_driver]

Middle weight motors

William, to be honest I think you would be better looking at motors around the 400w to 750w range. In the middleweight typhoon we used 2 750w iskra motors and they were more than adequate for our needs.

[jamesb]

Middle weight motors

if you need gearboxes as well? try finding scrap mobility scooters (like the ones you see in asda) or small elecric wheelchair motors?

another option, start with a featherweight, and move up to middleweights later?

[Guest]

Middle weight motors

thanks for the help guys, much needed

[Guest]

Middle weight motors

does anyone know where to buy second hand wheel chair motors with gear boxes attached?

ta
billy

[Guest]

Middle weight motors

would these wheel chair motors be the best to use, (im trying to get a motor which has already the gear box on it, and even better if the transmission is there also)

ta
billy

[maddox]

Middle weight motors

Gearbox and transmission is thesame for us.

Unless you want to go Firestorm, with a single motor and a differential( keep in mind that Firestorm had 1 large and 2 small motors)

Also, I think the Speed 900 motors can drive a middle. If you use 4 of m. Each do easely 320W on 24V. If 259 in heavy config could drive on 4 simular motors....

[julian]

Middle weight motors

The other problem is that a middleweight has a lack of opponents, and fighting the heavyweights hurts!

[Guest]

Middle weight motors

do any of yous think that the scooter motors would be ok to use for a lighweight bot?

thanx
billy

[maddox]

Middle weight motors

With the right size of wheel, Yes.

[john_frizell]

Middle weight motors

Scooter motors or wheelchair motors will be fine. With wheelchairs you get motor/gearbox/wheel in one package. Lots of wheelchair units are scrapped when they have lots of life left in them. Go to your local mobility store and see whats available or check the ads in Friday Ad. You will need to remove or defeat the brake but thats not hard.
Wheelchair units will give you a slow and underpowered robot but it will be an easy build and easy to drive. You can run 36 volts to the motors to speed it up. Make it very solid with armour over the wheels because although you plan a middleweight, you will find yourself fighting heavies. I have had over 50 fights with my middleweight and only 4 of those were against other middles.
Good luck with your build.

[julian]

Middle weight motors

Are you going to Wicksteed Park, John? Or more importantly, is the Sandwich going?