Hi,
I am new to robots and this is my very first build. I am aiming to build a 4 wheeled rover that zooms around the house. So far I have chosen the sensors, micro controller, motor controller, motor, and wheels.
Those are the wheels I want to use. The only problems is that the centre ring of the wheel is1 square and my motor has a circular shaft (robotshop.com/productinfo.aspx?pc=RB-Ban-239&lang=en-US)
Is there any way I could attach the wheel to this motor? Or will I have to get a new motor or wheel altogether?
Another Question, on tiled surfaces, will that omni directional will have enough grip on the surface to move properly or will I have alot of wheel spin?
Hi,
There is a final problem,
My bayteries are 12V and my sensors run at 5v each, because I only want one set of batteries, I chose this vvoltage regulator (robotshop.com/en/lm78m05-voltage-regulator.html), is this a good voltage regulator? Is there anything else I need for this voltage regulator to work?
Well,
The 5th motor is really just in case I the differential drive system doesn’t work exactly how I want it to. Because this is my first robot build, I only have a slight idea how well it will suit my needs. If it doesn’t exactly suit my needs, I will put a wheel at the back of the robot, and use some sort of servo motor to turn the wheel left and right, therefore steering the bot. That is only if the differential drive system does not work…
I decided I am most likely going to build the chassis myself, as I can build it to better suit my specifications. The wheels on this chassis wont be omni directional, and their size will most likely be 100mm
Ok, so what batteries would you recommed I use?
I would like the robot to last a fair amount of time.
Also, do you know of any omboard chargers I could use?
So when looking for a battery, I just have to get them to suit the motors voltage? Or do I have to take other things into consideration, such as sensors, and microcontrollers?
My motors nominal voltage is 12v, and im running 4 of them.
I have been considering some other options. It would be fantastic if the robot could zoom around and make some good curves, and I don’t really think omni wheels can create such curves (Please say so if im wrong!!!).
For such sweeping curves I was thinking of adding a wheel at the back that is turned left or right by a motor. If you reckon this would work and effectively turn the robot, how would I go about attaching it to a motor? I am guessing I need to get a Hobby Servo Motor, but what else would I use?
Hi,
Sorry for constantly changing my ideas, as I said I am really new to robotics. I was thinking of running this outdoors as well, because to some the idea of a dog chasing a medium sized robot around the house may not seem too appealing. Would omni wheels run affectively outdoors or would I have to rub my own steering system?
If I need to run my own steering system, how would I go about doing it?
Would this be the best way to achieve a turning system?
The problem is, I want this robot to be dynamic and fast in its turns. I needs to be able to change direction quickly, thays why I was wanting to go for omni wheels at the start. Is there any turning system like the omniwheels that can be used outdoors?
Would something like a caster work?
How about a 3 wheeled system?
I need a steering system that is suitable for both indoor and outdoor environments. I read that differential steering is great for outdoors, but can have its flaws indoors. I also read that car type steering is great for indoors but can have its flaws outdoors. youtube.com/watch?v=uaT7M3Nwj7c - Something like that would be perfect! Is it possible to get that kind of technology? Would casters do pretty much the same job?
Hi,
I plan to use 4 of these motors (robotshop.com/banebots-rs-555-12v-7750-rpm-brushed-dc-motor.html)
Will that be able to turn quick enough?
You have to imagine a dog chasing this thing around. The bot sees and obstacle, and must be able to change direction quickly, before the dog gets it
With a 4.1 gearbox ratio, what would my new torque and rpm become? The problem is, I need high rpm for high speeds, but I also need torque for quicker takeoffs and better performance outdoors. Will the rpms after applying the gearbox still be enough to generate speed that can outrun a dog?
