4WIDR
4WIDR
Author's Notes
Posted By mike1 on 07/28/2008

4 Wheel Individual Drive Robot (4WDIR)
Pros
Won’t jam if one wheel is locked up.
Kicked up dust or soil mounds passed by the movoing gears jam up the gears and destroy gears.
It is bigger
It has much more space between the back and front wheels allowing for slipping or slowly crawling down steps.
Can somewhat operate even if one brick loses power.
Low Center of Gravity
Don’t rely on gears than can be jammed with some soil.

Cons
Hard to syncronize
Lower ground clearence
Power Hog
Can’t spin on a dime (for now)
Hard to replace batteries
Hard to make programs with multiple sensors.

Even though the 40 tooth gears don’t seem to get much traction, they are good enough to work on the ground. The reason I didn’t want the robot to use normal wheels is because of carpet and actual rough terrain where rubber ain’t going to get traction to loose soil on a hill while the gears get plenty of traction by driving in their teeth. I got my inspiration from Voyager GPS robot. I was trying to accomplish a pivot robot but I couldn’t because my wheels were to small to build a big joint. I’m currently trying to improve it so it can fall or slip down carpet stairs without jamming or destroying itself

Comments (4)

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#1 megamindstorm101
Posted on 07/30/2008
so you have 2 nxts thats interesting i want to get two for rc stuff.
#2 mike1
Posted on 07/31/2008
He he, Actually 3 NXTs one for syncronizing if ever needed. Well one of them is my friends (he never uses it and he got a battery pack that he didn’t use. So I’ll guess I could use these NXTs for a while...
#3 NXTBoy
Posted on 09/01/2008
Try replacing the wheels so they look like the ones on this
http://robotics.ee.uwa.edu.au/omni/wheelchair-design.gif
that would enable it to go sideways, and spin on the spot

video: here
#4 mike1
Posted on 09/01/2008
That looks somewhat like a small worm gear. I wonder how I can build that...

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