Sprockets on wheels

[motty]

Where do I get the wheels with the sprockets attached so that I do not have to mount my wheels directly onto my drill motors also what kind of gear ratio and drill rpm should I be looking for?

[geeza]

Sprockets on wheels

Im confused, the drill motors come with a gearbox on so you dont need to have any other sprockets attached to your wheels. Unless you are planning 4WD from one drill motor per side?

[motty]

Sprockets on wheels

I am looking to put a sprocket on the wheel and drive that from the motor purely so as not to attach the motor to the wheel directly not to be used as a gearbox as such only so as any inpact on the wheel is not an impact on the motor itself

[geoff]

Sprockets on wheels

Something like this?

http://www.pillowtorque.com/tech.htmhttp://www.pillowtorque.com/tech.htm

[motty]

Sprockets on wheels

Not really Geoff, I want to put a sprocket onto a wheel and then drive that from a sprocket on the drill motor so that any shock on that wheel is not a shock on the motor bearings, or do I not need to do any of this and just put a wheel onto a drill motor

[RogueTwoRobots]

Sprockets on wheels

So you would effectively be having the chain/sprocket setup running a 1:1 ratio, therefore no alteration in speed or torque from the drill motors?

I wouldnt add that complexity personally. While, as you say, it will save the motor from any potentially damaging shocks (from being flipped for example) youre adding more areas of failure.

The chains could easily jump or break during a fight, leaving you high and dry. Connecting the wheels directly to the gearbox is a much simpler option. Yes, there may be a time when the motor bearings become damaged through shocks but that wont happen as frequently as chains jumping or breaking. (and drill motors are relatively cheap to carry as spares)

A direct connection to the drill will also save on weight, allowing you to add that extra bit of hardox or steel to the sides or top of your bot, which may defend against spinners or axes.

Also, the one-piece Robochallenge drill mounts or the two-piece Xbotz drill mounts have served many roboteers well. Both have had comments like In over x amount of hours use, or despite being flipped x amount of times, the motors dont sustain damage

If you use either of them in your robot for your drills, you probably wont suffer from bearing failure too regularly (probably about 8 times out of 10 being flipped, you robot will initially land on its chassis before landing back on its wheels anyway, therefore the largest shocks will be absorbed by the part thats designed to cope with them)

[glen]

Sprockets on wheels

you can also mod the drills to have 6 pins, and an extra plate on the other side of the second stage gears if you want to. tons of us over in oz land do it with vast success, broken drills is like so last year

[motty]

Sprockets on wheels

Could you explain that for me please Glen as it sounds very interesting but being slightly stupid I have no idea what you mean

[woody]

Sprockets on wheels

Here you go Tim ...... http://www.robowars.org/forum/viewtopic.php?t=880&sid=3608b9fbe2be62c41bfbd3ec51 3dd10ehttp://www.robowars.org/forum/viewto...62c41bfbd3ec51 3dd10e

Happy reading