Yet another Gripper post...

[DirtyRoboto]

I have just (as of yesterday) finished my first attempt at a gripper, and have been playing with it for a good few hours.

I have just done a video for you guys so you can grasp the concept (hehe) of how the grippers work.

I went for a design that was a fixed thumb and movable grasp. I decided that I wanted to introduce tolerance into the design by having the fixed thumb plate, it would flex but also offer good grip so that the servo can rotate to its end stop without great stress, yet also offer a good fixed surface to grip against.

**** THIS IS THE FIRST EVER EMBEDDED YT CLIP ON THIS BOARD (SO THERE ) ****

http://www.youtube.com/watch?v=If-_ojUnens

Marcus
_________________
In servo's we trust!

[Pev]

Cool, like the sprung thumb.

I haven't tried this with the Hitec Servos but is there any way to read the current load? I used this technique with the Bioloid AX-12 servo to set a load threshold to stop the servo when the gripper had got hold of the object?

Cheers

Pev
_________________
Carl
-------------------------
www.alt-view.co.uk

[DirtyRoboto]

This is just stage 1. The bracket will be replaced by a custom part and the thumb will evolve in its shape.
I would not consider touch or force feedback in this config. I would look at triggering different grip routines by remote. I would section the grip into 6 degrees. 1 is light and 6 is full. If I go over by one then the flex on the thumb takes it up.
_________________
In servo's we trust!

[Pev]

Cool solution as it lets you control the amount of grip

Pev
_________________
Carl
-------------------------
www.alt-view.co.uk

[onesandzeros]

cool concept

[gdubb2]

Great grips..

I like the idea of the spring loading. I may have to return to the drawing board..

Gary

[beermat]

Interesting concept. YouTube says the video is not available now, BTW.....

[Humanoido]

I like it. Great preliminary. Did you buy an extra bracket and servo, or have a spare Robonova for parts? After affording RN, there's not much cash to spend so I'm looking for low cost but highly workable and good looking.
Humanoido

[DirtyRoboto]

Yea, I bought a few servos and got some various brackets to test out some madcap designs I have.
I will try and post some photos so you can see what I have done. Start to finish took me about 50 mins.

Marcus
_________________
In servo's we trust!