Starter moter

[Guest]

i am lookin at using a carstarter moter for my bot because i have a low budgit and can get one at a scrap yard for a couple of bucks i was wondering if they can go in reverse if the curent is reversed i know that i have to cut the field winding coil wires and conect them directly to a battery and take out the selanoid but if i reverse the curent after that will the motor reverse or is there some kind of mecanical catch to stop it from reversing
and dose the selanoid move the gear on the motor or the whole insides of the motor and the shaft that comes out how long do they last do they burn out after a certan amout of time or do they last a while can you give me rough specs of a starter motor like hp torke and rpm

[Guest]

Starter moter

I only have seven words for you!

http://homepages.which.net/~paul.hills/index.html

[maddox]

Starter moter

If youre strapped for cash, and still want to build a robot, then startermotors arent realy the way to go.
For the same amount of money you can get some wipermotors. With 4 or 6 you can get a heavyweight moving, giving more controle and upgrade possibilities in the future.It wont be fast, but you can use smaller cheaper batteries and due the low speed On/off relay control can be used.
And speedcontroling startermotors was a disaster, as my first robot used a startermotor, so I speak from experience.It isnt cheaper.

[jamesb]

Starter moter

my new (well, havent actaully started it yet but got the bits sitting on the table) featherweight uses a starter motor.

wont say any more than its name.....

Trauma.

[mute]

Starter moter

Or you could call it Fireball

I can almost smell the Nicads burning already.

[jamesb]

Starter moter


who said it had NiCads????

yeah ok, it does :sad:

go away..... snot fair.... blub.

(being serious though, Im not daft, Id thought of the current requirements.)

[big_nipper]

Starter moter

Starter Motor 4kG, battereis to run it for 5 min 2kG, over half the weight gone, doesnt leave much left for anything else.

When we got the Litton Motors they were £35 each. Pitty the CIM2s are more but they are better built. Starter Motors can work but are very unreliable and this is probably why hardly any are used. To use them you really need a current limit.

[leorcc]

Starter moter

In all fairness, i do not recommend starter moters in a robot, not for drive at least. Not because they are unreliable because the ones ive used in 2 robots were very reliable and powerfull, but simply because there too hungry for amps, and speedcontrol is virtually out of the question.

We had a 40Ah SLA battery on board, 2 startermotors for drive, and we could barely make it last the 5 mins in a fight. We had heaps of power though, and loads of torque.

--
Leo

[Guest]

Starter moter

thanks for all the help so they draw a heap of power you said like how many amps and i still didnt ancer my question about reverse or if the selanoid moves the gear or he whole shaft of the motor thans for the help how fast do you think it would go on 20 amps

[leorcc]

Starter moter

mine drew well over 180 amps during acceleration, and about 100 during driving.

[woody]

Starter moter

Perhaps these will answer some of your Qs Davd..

http://www.m.case.btinternet.co.uk/html/stater_motor_mods.htmlhttp://www.m.case.btinternet.co.uk/h...otor_mods.html
http://www.mgcars.org.uk/electrical/start_sol.htmlhttp://www.mgcars.org.uk/electrical/start_sol.html
http://www.mgcars.org.uk/electrical/start_motor.htmlhttp://www.mgcars.org.uk/electrical/start_motor.html

[Guest]

Starter moter

if you limited the curent i could get how low do you think you colld get the curent and still get a reasionabel amout of power and dose the selanoid move the gear on the shaft or the whole shaft

[maddox]

Starter moter

Forget limiting a startermotor, you will rob the only advantage those have. Torque for amps.
And only 1 brand of relay I know and trust,useable in RW and capable to switch startermotors or bigger on A. Albright. At least a SW 80B .Or when you want reversing, the SW 88B.

[woody]

Starter moter

On the later pre-engaged type it moves the gear on the shaft.

[Guest]

Starter moter

If you would have read the link that I posted above, it would have answered all your questions!

But please, learn how to spell properly. Your posts are really difficult to read.