wiper motors are best for featherweights. if your looking at bulding a heavy, then wheelchair motors would be the easiest to get hold of on a scrapyard (we got ours from there). they may also have the control gear as well, which can be easily modified.
Theres a special chapter on that page called http://homepages.which.net/~paul.hil.../Starters.html
I used starter motors for the drive power in Velocirippa for 2 years and actually qualified for series 3&4
with them. They had tremendous torque at only 12v but the current draw was horrendous. In combat I
would often find cables stripped of insulation or even melted together, and lots of puddles of solder.
Reversing was pretty straight forward with heavy duty relays, but speed control came from switching from
6v to 12v batteries (2 speed). It was almost impossible to make the batteries last 5 minutes, if they did they
were totally flat, so I had a car full of charged spares.
I finally bought 2 littons but to match the torque output of one 12v starter I have to push 36v through both
motors.
That said I would not touch them again ever, even as a weapon drive. I now have reliability, batteries that
will go 3 or 4 fights without charging, speed control, and smaller cables. I also don€™t have a box full of
melted relays.
If you are working to a budget I would recommend scouring the scrapyards for air-conditioning fan
motors from audi or VW€™s, some of these use 12v Bosch motors and are pretty powerful, I know, I have
one that was given to me by a friend and it only cost him a tenner. Visually they are identical to the 24v
Bosch motors used by many builders.
Also dont for get the radiator fan motors ,some of them are quite big ,i got some bosch motors very similar to the 750 GPA a while back.
GORD
So David the recommendation of seasoned Roboteers is .... Leave starter motors alone!
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Christian has been helpful in providing a link to one of the best resources for this sort of thing on the web. The fact that you have not read it (you cant have, or youd have the answers to most of your questions) does not give you the excuse to address other people in that manner.
I could provide you with quite a few in depth link describing the relative merits or using wheelchair motors, but you are really not deserving of the time that people have gone to to try and help you.
Suggest we have some moderator attention in this thread before we end up with the second pointless flame war of the week.
Yupo swearing like that is a big no no and i will not be suprised if admin ban his account.
I was trying to help you, but the fact that you didnt read the link is quite obvious, it would have answered most of your questions (including that about the solenoid).
But as Im not easily offended, I will still try to answer your questions. You may also want to look at the Reliance motors from Roger Plant. They may not be the best motors in the world, but theyre fairly cheap and have moderate power.
The choice of wheelchair motors is huge. They can produce anything from 300W to about one horsepower. But most importantly, they already have gearing.
The radiator fan motor in most cars will produce something like 400W if theyre run at their recomended voltage (four times that if you double the voltage). Theyre also quite cheap and might be a good choice.
If you decide to go for them, try finding the motors from an old Audi 100 (they weigh about a kilo more, but peak at about 600W instead).
but i did read the link it said 2 difrent things about the seanoid i couldent tell what it was trying to tell me that i moved the shaft or the gear thaks for the help with the wheel cair motor and the radiator fan motors sory about the last post i had a bad day
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