Hi,
I want to create a small thing that goes on wheels - something that goes forward and backward (with a robotic arm - but that's extra). Can you tell me which motor is the best and/or, if it isn't difficult, give me the Amazon link? (I fear that I will choose the wrong one only with the name... sorry...
The best motor is definitely the one that fits your specifications and budget, and works well with your project.
speedylearner:
Hi,
I want to create a small thing that goes on wheels - something that goes forward and backward (with a robotic arm - but that's extra). Can you tell me which motor is the best and/or, if it isn't difficult, give me the Amazon link? (I fear that I will choose the wrong one only with the name... sorry...
You'll need to give a lot more specific specifications than that if you want anyone to be able to pick out a motor. How big? How much torque? How much power? How many volts? How much weight?
It's a bit like asking what are the best tires for my vehicle without even telling you whether it is a car, truck, or motorcycle. It's impossible to answer.
Find something you can buy - perhaps a kit to make a similar device and see what sort of motors it uses.
Have a browse in some the online shops that sell parts for making robots.
For a small lightweight project that does not need to move very fast continuous rotation servos might be suitable. They come in a neat package that includes gears and the motor drive electronics.
...R
I would like a 5V motor, the weight does not go over 1kg. I need four of them (four wheels). The dimension can be around 3x3x5 (or something around this).
Thank you Robin2, I think I focused my browsing on the motor and not on the kits 
As for the continuous rotation servos, I think that's what I need. Thank you very much!
speedylearner:
The dimension can be around 3x3x5 (or something around this).
Might be an idea to say what the 3 and 5 are, milimetres or miles ?
From my (extremely limited) experience, gears are also needed and, in my case, are much more difficult to find or to build from wheels and axis.
I plan for few months time to learn and start making a platform on tracks (or wheels) using gears and motors. For me, the motor is the easiest thing. Any motor can do the job. I found more time consuming to plan the gear and to design the overall (primitive) robot.l
jremington:
The best motor is definitely the one that fits your specifications and budget, and works well with your project.
this is the most correct answer.
trial and error is inevitable.
some time spent looking at the works of others on youtube or the net will show what others are using.
the terrain will dictate many things
the weight of the vehicle will dictate many things
the speed desired.....
I can almost assure you that once you get your project up and running, there will be something you want to alter, improve or replace.
in my humble opinion, the best is the one you have to work with now to gather data for the one you need to accomplish your goals.
The dimension can be around 3x3x5 (or something around this).
3 millimeters by 3 yards by 5 miles?
I believe that if a unit of measure is not specified, then the default is to use the FFF standard.
Clearly then, this is 3 furlong by 3 furlong by 5 furlong.
vinceherman:
I believe that if a unit of measure is not specified, then the default is to use the FFF standard.
Clearly then, this is 3 furlong by 3 furlong by 5 furlong.
F**king Forgetful Freaks?
speedylearner:
I would like a 5V motor, the weight does not go over 1kg. [...] The dimension can be around 3x3x5.
A motor is mostly metals but with some air as well, copper and iron and some magnets, let's say the average density 4 g/cm3. Therefore a 1 kg motor would be about 250 cm3. A cylinder (motors are usually that shape) fitting in 3x3x5 inch bounding box is 573 cm3, if that's 3x3x5 cm3 it's just 35 cm3. So neither gets close.
So it's not cm, nor inch, or it is cm and the motor has to be a lot lighter than that.