Wheel chair motors, batteries and wheels

I have been offered a fully working wheel chair and was wondering if any of the parts in the title would be usable as I can just over time start to collect bits for a heavyweight

In short, yes

So everything off that would be usable?

exept the battery, yeah i would imagine so

Motors are a definite yes, I am using them on Scar and also have a new set on the way. Wheels, I suppose so yeah they will attach straight on and, if they're free you cant go wrong with that. Batteries, maybe, though I havent used them. Using the setup as it is almost guarantees that it will work, and will also keep the costs down. If you decide at some point that some or all of the parts can be upgraded and you're enjoying the world of heavies, then go for it. Thats would be my thinking anyways.

Generally if its free, I would say take it! :lol:

If I were to use those, add another set of wheels and make it 4wd I could be onto a robot that might hold it's own as a pusher in the arena?

jack orr had a 4wd hw pusher driven by wheelchair motors and i think that beat dantomkia

My wheelchair motors are currently stationary (I think the last time they worked was on Robot Wars series 4 :lol: ) but from what ive heard there are better options out there for pushing power. But by no means useless

If I made it investable with 8mm steel armour, I think it would work?

all i would be after to start with is a robot that can just hold its own in the arena when eventually upgrade to a flipper system similar to merlin :)

yes wheelchair motors work on heavyweights although as some of them are quite slow (7mph) you may need to either use different gearing, bigger wheels or change one of the gearbox gears to one with a lower amount of teeth which is what the pair i've sold to tony have i beleive. the batteries may be useable it depends on there voltage/amperage/weight and if they will leak acid allover the arena if flipped as can happen with non sealed lead acid batteries. for armour i'd strongly suggest investing with hardox armour as it does seem to be the way forward.

i'd consider the cost, time and skill required to build a fully functional heavyweight that won't get trashed in its 1st fight before you commence your build. but don't let me put you off :) also if you can get most of the parts for free go for it

its a heavyweight that is going to be a 'keep costs as low as possible' one that will also still work. we already own a wealder for steel and its fairly readily avalible around my area so i would probably go with it

Personally, I would use the free battery for testing, then when you're ready to fight you can buy ones that are more appropriate, assuming the one you're getting with the chair isn't. But then i'm a Scotsman so i'm pretty tight...

im from the midlands so we are also tight :)

this would probably take about 2 years too build probably from a cash point of view but i going with the 'keep costs low yet build it right' theory. its going to hopfully have a very powerful electric lifter similar to bio-hazard since there aint as many safety ruels as with CO2 powered ones and my knowledge of electric lifters is far better than CO2 powered ones.

8mm steel armour and hardox parts for the lifter. will run fully inverted.

one question, how far can you over volt wheel chair motors?

it differs for every motor, as a general rule only overvolt to 150% unless you're sure that the motors can take more

so if they are 18V, i can go to 24V etc?

also, this is something which will take a while, yet i think will be worth it in the end

most are 12v or 24v, but an 18v on 24v should be fine.

ye, that sounds fine. with the armor im having i should do ok in the arena. but it will be tracking down a powerful enough motor for the lefter which will be the issue

look to about spend £200 on the wepon motor

depends how fast you want the lifter to lift. a bosch 750 may suffice with correct gearing. a very powerful linear actuator may work although it would have to be built pretty strong, i beleive team hydra's linear actuator on smidsy kept breaking due to the power of heavyweights smashing into it.

There is a 4.5 BHP motor running at 24 V from the guys who build bio-hazard in America but if I can find something over here it would be better but importing might be the best call if I can't get a similar product over here

im thinking that if i can find someone who knows about pneumatics to help me along with buying parts etc then i will go with either a LP pneumatic lifter of flipper but now i really cant decide on which to go for!

there are pros and cons to both and i dont know if i got flipped with a classic flipper, could i self right etc were as a lifter i can make so i can run inverted. also with a bar im not sure if i would be able to chuck people out the arena (which does appeal to everyone) and which would be the easier of the two too build?

if possible i would like peoples opinions on these points so i can make a more accurate decision. i like both but i dont know the pros and cons

don't go pneaumatic just yet get it moving add an electric lifter, just for the sake of not having antother heavyweight flipper and much more strict safety things, and as its only your second robot.

The more I look at electric lifter, the more I see thy thy are quite difficult to get right, it's not a attach he motor to the arm and away you go thing, and it would probably end up being less expensive going with CO2 than electric

don't go pneumatic, to get a decent flipper you either need to go full pressure or use a much more complicated system. besides there are too many flippers as it is, just build a decent electric lifter using a magmotor or something.

take a look at: http://www.teamstorm.com/storm2/storm2b.htm

with all the gearing etc needed for electric lifters and the constant thing of the motors being used and keep remewing them (best part of £200 a motor) i think going pneumatic will be better over all, but its just the finding a mentor about pneumatic's will be the hard part

just use the internet and this forum.

If I did a 2:1 or even 3:1 reduction on my drive would I get a noticeable difference in speed or not?

Yes very noticeable, 3:1 would give you a third the speed you started with

so then what if i somehow did a 1:3 increase?

Your robot would go three times as fast but have 1/3 the torque and less pushing power

its hard, i need some more speed out of the motor (probably) yet i also need torque.

what is the best to have more of? torque or speed?

well if you don't have enough torque you won't be able to move. best to aim for 10mph speed (unless it's a ram bot) and hopefully you'll have the torque to move the robot around

its a single motord wheel chair from a rascel 205 with diff and top speed at maximum 154kg load of 7 miles per hour running at 12v but ill be running at 18v in the bot

well if it has a 7mph top speed at 12v giving it 18v will make it go at 1.5 times the speed so you'll get 10.5mph out of it anyway :)

how are you going to use the motor/gearbox if its only a single motor?

its a single motor yet with the diff its able to drive both motors and can turn on the spot, i really dont know how it works but it does :)

And now thinking logically I have realised that the motors is completely useless since It only does foward and back!!!!

I got free wheels basically and that's it. I need to somehow find another of the same motor of a rascal 205 and then strip the diff off it to leave me with just the two motors or downswing on the price, I might just go the old bosch 705w route

Where is the best place to buy 750's?

http://www.ellis-components.co.uk/

i beleive they sell them

I'll give them a ring tomorow and see what price they are