28-01-2008 13:49

Ben Piecuch

Re: pic: the inventor file

The concept looks good. I am slightly concerned about the length of the 2nd stage of your elevator. (The stage with the arm connected to it.) I would recommend having a larger overlap, or span between the contact points for that stage. The cantilevered load is quite high, and the "wheelbase" for that stage is very short. I think you'll find that the contact points will be under a LOT of load, and will tend to bind up on you. If you can lengthen the engagement of that stage, I think it'll help you in the long run. I'm also hoping that you add some diagonals to strengthen mounts for the elevator. What motor(s) are you using to raise the elevator?

Best of luck!

Bengineer

28-01-2008 13:50

Tapoore

Re: pic: the inventor file

Are you using Taigene motors to power that gripper? I see two, and we're only allowed to use one...

28-01-2008 14:14

sea_master

Re: pic: the inventor file

we dont know yet which motor we will use for the arms,
for the elevator we will usa cim motor with a planetary gear.
this is a 3 part lift and it wont be exactly like it is showen.. we r using frame instead of the 3rd part (with thr arms).
thank u guys for the notes.
ofir

28-01-2008 15:15

BRAVESaj25bd8

Re: pic: the inventor file

Is there a special material you are using to get grip on the ball? It seems as though it is very difficult to get anything to get a secure hold. Great design by the way, reminds me of old 2004 robots.

28-01-2008 17:51

edgar_amaro

Re: pic: the inventor file

nice... that is similar to the arm we were thinking about building ... but after thinking about it... we decided that it was going to be dificult to accomplish

28-01-2008 22:25

Tottanka

Re: pic: the inventor file

WOW what an amazing arm!
Whos' the genious that suggested that

JK, i'm a part of that team.

And yes, we are using something that is gonna assist us in friction on that ball, and it's working great (the even greather thing is that currently i am the only one on the teams who actually knows what it is and how great it really works!)

28-01-2008 23:42

DonRotolo

Re: pic: the inventor file

Very nice.

I saw those grippers and was reminded of a huge bubble wand. Now, wouldn't that be cool if it could also blow these HUGE soap bubbles??

29-01-2008 00:24

rachal

Re: pic: the inventor file

The bubble wands aren't made out of aluminum, are they? What's the wall thickness? Just looks like they would be obscenely hard to fabricate...and they could definitely be made lighter

29-01-2008 07:54

FIXIT

Re: pic: the inventor file

Quote:

Originally Posted by Tapoore Are you using Taigene motors to power that gripper? I see two, and we're only allowed to use one...

29-01-2008 09:52

Maggie27

Re: pic: the inventor file

That's something strangely similar to what we're doing.

29-01-2008 12:33

MrForbes

Re: pic: the inventor file

It really only needs a motor on one side of the gripper...and you could make the other side spring loaded so it fits in the starting configuration size limit, but also will bend over several inches to allow the ball to be centered (as you run the motor on the other gripper)

29-01-2008 12:38

sea_master

Re: pic: the inventor file

i don't understand what u are saying .
the arms need to rotate back and forward and also open and close on the ball.
how can it be done with only 1 motor?

29-01-2008 13:22

MrForbes

Re: pic: the inventor file

Oh, I didn't realize the need to rotate, so what I said was wrong...sorry!

If the arms only need to rotate over the lift when the lift is in the full up position, then you could connect both sides together with a shaft, and then you would only need one motor. I can not tell enough about your design to know if this would actually work, though. Does the center part slide all the way to the top of the channel?

29-01-2008 16:16

sea_master

Re: pic: the inventor file

now i see, we thought about it but it wont work with 1 shaft.
what u suggested might work i will check it out!
thanks alot!