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Author Topic: its an idea for a transformer , help me out  (Read 1541 times)

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Offline diablocyrusTopic starter

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its an idea for a transformer , help me out
« on: July 05, 2009, 12:24:17 PM »
i have built a spider bot

now i want to try a revolutionary idea so help me out






i would like to get a leg design of the quadruped robot that is posted in the video

it is an awesome robot


[youtube]http://www.youtube.com/watch?v=MFgePgQ73Ws[/youtube]



i dont know how to design the legs

please help me out

i intend to make a transformer as i like that movie

i will just share my idea

it will be a hexapod

but its middle leg on both sides will be longer

it can walk like a quadrapod and hexapod and also drive as a car

but if it walks like a qudrapod the longer legs will be used as arms



then the hardest part

it can also walk as biped robot

this is where the longer legs comes to application

these legs have more base width for balance

the front legs will become hands

the hind legs will become either balancing since it can also reach the ground when in biped mode

or as another pair of hands -like goro of mortal kombat




according to my calculations and assumptions

there is a need for 4 degrees of freedom per leg 3 for movement of joints and 1 for the wheels

i intend to use stepper motors bcos it moves at same speed at all battery levels and since it is a biped robot it needs to have special flexibilities right


i also planned on adding an optical mouse sensor to calculate the distance an other stuffs

but now only the transforming function is much important along with walking and wheel drive

it would have 24 motors i think

i would like to do this on a pic 18f series with usb 2.0 support



plus i would like to know more about how they did the balancing

is it with a pressure sensor

Offline Metal Slug 2

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Re: its an idea for a transformer , help me out
« Reply #1 on: July 05, 2009, 03:14:52 PM »
If by "balancing" you mean retaining its horizontality or parallelness with the ground this was most likely done with an accelerometer.

Heres something to think about:  each leg has a wheel on it right?  Therefore if you want your robot to ALSO be a biped, you run into a big problem.  If your robot attempts to walk on two legs, its feet will be wheels...hmmm...if you have ever looked at other Bipeds, you will notice that the feet are ussually very large compared to the rest of the body.  The reason for this is to provide a large base, so the robot will not fall over.  If you have wheels as the feet to your robot, to put it simply: your robot will never walk.

Offline diablocyrusTopic starter

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Re: its an idea for a transformer , help me out
« Reply #2 on: July 05, 2009, 06:39:08 PM »
If by "balancing" you mean retaining its horizontality or parallelness with the ground this was most likely done with an accelerometer.

Heres something to think about:  each leg has a wheel on it right?  Therefore if you want your robot to ALSO be a biped, you run into a big problem.  If your robot attempts to walk on two legs, its feet will be wheels...hmmm...if you have ever looked at other Bipeds, you will notice that the feet are ussually very large compared to the rest of the body.  The reason for this is to provide a large base, so the robot will not fall over.  If you have wheels as the feet to your robot, to put it simply: your robot will never walk.


well not all the legs have wheels

the middle leg on both sides have longer length and more base

i have written

it can also walk as biped robot

this is where the longer legs comes to application

these legs have more base width for balance-


and these longer legs doesnt have wheels on them

when it moves as a car these legs will be working as a robotic arm
that is the 4th motor in these legs will be used for operating the grips instead of wheels

 

i havent quite decided about that

but in car mode the legs will be turned to upside

bcos it dont have wheels

4 wheels is enough bcos  otherwise more friction hard to control and more motors


and an accelerometer how ?

could u explain it to me

and was i clear enough my friend

if u spotted any more problems in my idea point it out

:)


but i say that it can walk

:)


Offline Metal Slug 2

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Re: its an idea for a transformer , help me out
« Reply #3 on: July 05, 2009, 09:56:44 PM »
Oh ok, that now sounds like a somewhat feasible idea.  For a more in depth explanation and for one that would be better than mine, read this: http://www.dimensionengineering.com/accelerometers.htm

Now that you have mentioned that the middle legs will have grippers, possible you could just open them completely and use those as the feet (which was probably exactly what you had in mind).

Offline diablocyrusTopic starter

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Re: its an idea for a transformer , help me out
« Reply #4 on: July 06, 2009, 10:03:51 AM »
wow

not really

and thats an awesome idea

ur really good

but could u help me with the design of legs

i only have ideas with me

i would share them

and about accelerometer

so for each leg u need to have that or one for all legs

:)


Offline diablocyrusTopic starter

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Re: its an idea for a transformer , help me out
« Reply #5 on: July 07, 2009, 06:04:29 PM »
http://www.sarantel.com/products/index.php


just a doubt

will this antenna work standalone or it just an antenna to be conneced to a gps module

 


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