Mindboards

Hi everyone!

NXT beginner / short time lurker just turned member here! I love what I've seen so far and am glad to have found this place.

As I'm just starting out with the NXT, I am finding new hurdles and overcoming them several times a day. But one problem that I still haven't been able to find a good solution for is this:

I want to create a device that is able to grab objects in order to then pull, carry or lift them. I've experimented with dozens of builds so far, but I haven't found one that gives me enough flexibility while maintaining a high level of stability. Maybe someone has a few pointers? I'll attach a few photos next to let you know where I stand currently.

Why won't the pictures show?

It doesn't work because you're not using the right URL:



Uploaded with ImageShack.us
Regards,
Xander

Well, they are URLs pointing to the pictures, never knew it could be "righter" than that

The only thing I can think of is the use of clutch gears, to allow the grip, then with the same engine the continued revolutions of the motor for the next movement, be it lift or pull, or what have you.

there has been used such a gripper for a submarine model using pneumatics, and a similar one for a RCX robot gripper (IIRC in the set "Exploration Mars" using a Motor with a Newton wheel).
It 1st closes the gripper and then lifts the arm by a lever system (or lowers it and then opens the gripper).

If you google 'lego gripper' you will find quite a few photos of examples. easier than trying to describe them.

h-g-t wrote:If you google 'lego gripper' you will find quite a few photos of examples. easier than trying to describe them.

I did (I don't know if you did) but I could not find fotos of such 1-motor-gripper-arms - but maybe you could show us? ^^

Didn't look very hard, d-h.

http://us.mindstorms.lego.com/en-us/Com ... 92b942dd6c

that's in fact a good one. Couldn't find that googling 'lego gripper'.