How to chosse a mottor

How to choose a motor

I bought one Arduino starter kit and am very exited about it.

So far I played around with the servo and led.

I decided that the best way to learn is to have a goal and strive to archive it.

I have a few years of programing in my back so I am just having some trouble with the hardware part.

My goal will be to build a replica of Tiger V tank and after to conquer the world!

If I am no mistaken the main body of the tank will be around 80 cm wide, 120 m length and 40 cm height, this without the main canon.

That makes the tank heavy. I guessing around 50kg with a few motorcycle batteries for power it.

I would like to start with the motor part of the project.

I don’t know to choose the motors, I don’t even know where to buy!

Should I go with step motor? DC motor?

I was thinking in using one motor for each track of the tank.

Any suggestions? Alternatives?

First you'll need sealed deep-cycle batteries, not standard vehicle batteries.

Secondly you're going to have to work out the mechanics in order to estimate
torque and speed for motors - factors include gearing ratios, friction losses,
maximum incline required to climb, maximum speed on the flat. Do you have
ideas about drive gearing etc and friction in the treads?

[ you may be into the range of a few horsepower BTW ]

First you'll need sealed deep-cycle batteries, not standard vehicle batteries.

Aha! just learned something, i did not knew there were another kind of batteries now i know i am going to need boat batteries and not motorcycle ones.

Do you have ideas about drive gearing etc and friction in the treads?
Not a clue! I was thinking in budding around the motors since i no experience building hardware, if it does not work for my goal its ok, i will learn from it and move on.

First goal is to make the Arduino move two motors. I got one to move, well i got a servo to move. But it seen simple to move the DC motor. Step motor i believe it is harder and require extra shield (I calling the board that controls the step motor shied correct?)

Is there any benefit in using a step motor to a remote controlled tank?

Can you point where i can buy motors and give me your best guess for a model that will be sufficient to start my project of world domination?

uacaman:

Do you have ideas about drive gearing etc and friction in the treads?
Not a clue! I was thinking in budding around the motors since i no experience building hardware, if it does not work for my goal its ok, i will learn from it and move on.

You have to understand mechanics and motor sizing to choose the motor for the task.

I suggest you start with a much smaller build first, the heavy stuff is expensive
and guesswork isn't enough, educated guesswork (back of the envelope calculations
are required). Make cheaper mistakes!

i don't where to start, no even to a smaller version. Can you at least provide a link to any store that sells motors? or should i go for RC modeling stuff?

Used car screen-wiper motors are a cheap source of low speed high torque 12v motors.

Another option may be golf buggy motors.

And golf-buggy batteries might be available in more convenient sizes than marine batteries.

I would just use cheap (maybe even used) lead acid batteries to get me started.

...R

Cordless drills are another good source of powerful motors. You can get old ones from junk shops when the built in rechargeable battery has failed or is not so good.

And these days eBay has quite a range of DC motors / gearmotors of various
sizes and voltages at good prices.

RC motors are specialist very high current motors that need the appropriate ESC
and LiPo batteries to power them.

woot! Lots of places to start my quest! Thanks everyone for the tips.