Lego Adder/Subtractor Vehicle With Caterpillar Tracks

[appleintosh]

So... What model potato did you film this with?

[appleintosh]

@eliseley I think it is powered by a Lego RC motor. You can see it at the back, it is that odd shaped black piece. But I can't tell for sure because this was filmed with a potato...

[SMGJohn]

Where you get those small tracks you connect the engine with and all that? I've been looking for it every where

[AdhitoLEGOCreation]

Great!

you must be runs out of gears,isn't it?

[tomi9777]

Whats the point of using a subtractor?U get more torque with normal and hole lot easier to make.

[abbe5225]

lol this is nothing stupid but when u turn it sounds like it gonna blow in pieces xD

[TheLexhoya]

Short question: did you post building instructions on BS? I'd love to see what motors you used and in what way they connect to the adder/subtractor. You can also post via email directly, if you want. Thank you in advance by the way.

[eliseley]

cool design, what motor is it at the front and HOW THE HELL IS IT POWERED

[bcc423]

What are the advantages of this over powering each track with a motor? It looks to me that one motor on each track would be more powerful, more maneuverable and be of a simpler design.

[eliseley]

@bcc423 he made it to show it can be done and if anyone can make one of these they could make a tank style controlled viechle

[MrTRISTANCOOL]

ehmm this black motor at the front !

[MrTRISTANCOOL]

i have a question :

what is the motor for turning ?

please answer me

[SciGuy16]

@MrTRISTANCOOL Which motor are you referring to? There is one motor providing power to move the vehicle, and the other motor changes the ratio of rotational speed between the tracks.

[iansoreta]

@SciGuy16 I have a question. How can you steer it?

[WorldWar2Legos]

looks a little bit like WALL-E

[WilhelmTheAlmighty]

I tried to make one of these before, but |I didn't think it was POSSIBLE to make it so SMALL! Job well done!

[alreadytaken334]

I'm very confused about this video, because this is just a moving lego machine, it doesn't add or subtract numbers like the title indicates.

[SciGuy16]

This isn't a numerical adder, it is an adder of rotation. There is a motor that turns both tracks in the same direction and a motor that turns the tracks in opposite directions. Running the latter motor 'subtracts' power from one track and 'adds' it to the other, allowing different turning ratios to be obtained.

A numerical adder is slightly more difficult, but a worthy challenge for me to make in the future.

SciGuy16

[alreadytaken334]

Ah, I get it.

[amj441]

A lego train motor would be the worst for turning. (trust me I have one) any other motor would probably be better

[damititititiit]

goes pretty slow

[RjbsNXT]

tracks go slow because they usually carry heavy loads where high torque is needed

[youssef2008salem]

it looks like wall-e

[Dshmokiez]

A good way to have equal power to steering and motion is to have a motor server each side of treads, to turn can be achieved via either turning only one tread or turning both in opposite directions. - Using the RC set Lego released would help.

[SciGuy16]

Yes, I've done this on a few vehicles with the Lego Mindstorms NXT Servo Motors. I haven't uploaded any videos of them yet, although other people on YouTube must have done.

SciGuy16

[Scorge120]

this is perfect for say... a bulldozer powered by a pneumatic engine. This is what i've been looking for!

Thanks for posting it :P

[DjMarimel7]

cool SHIT

[pogodrummer]

nice idea!!!!