Society of Robots - Robot Forum

Mechanics and Construction => Mechanics and Construction => Topic started by: ccdjr106 on February 05, 2010, 07:27:49 PM

Title: gripper/claw
Post by: ccdjr106 on February 05, 2010, 07:27:49 PM

hi i need a gripper/claw that can open wide enough to pick up a water bottle


thanks

Title: Re: gripper/claw
Post by: Joker94 on February 05, 2010, 07:41:30 PM

there is admins gripper design, i am sure i have seen it pick up a water bottle sometime and it has a good shape for the job. or there is other gripper designs that could pick up a bottle but would have to line the surface area. like this one posted on Sor.
http://www.societyofrobots.com/robotforum/index.php?topic=10102.0 (http://www.societyofrobots.com/robotforum/index.php?topic=10102.0)

you also have to ask, what is the shape of the bottle, what is the weight of the bottle.etc

Title: Re: gripper/claw
Post by: ccdjr106 on February 05, 2010, 08:24:14 PM

well i dont know exactly what shape water bottle  but just a standard water bottle filled with water

Title: Re: gripper/claw
Post by: Joker94 on February 05, 2010, 08:47:07 PM

well if it is a standard water bottle you could design your own version of admins as i dont know if admins is large enough for you. and you will have to do the math on what servos will be able to pick up the bottle.

do you have to have it mounted on a robot or a stationary platform?

Title: Re: gripper/claw
Post by: dellagd on February 08, 2010, 06:10:31 PM

is this gripper going to be ONLY for picking up water bottles?
is so, designing it would be quite simple since it is only intended for one purpose

Title: Re: gripper/claw
Post by: ccdjr106 on February 14, 2010, 06:55:37 PM

ok guys i just bought one that seems to do the job its a little weak tho

Title: Re: gripper/claw
Post by: Joker94 on February 15, 2010, 02:46:19 AM

show us( a link would be good) :D'

give us ideas to and and good examples for others.

Title: Re: gripper/claw
Post by: ccdjr106 on February 15, 2010, 06:19:29 PM

http://www.robodyssey.com/mm5/merchant.mvc?Screen=PROD&Store_Code=RS&Product_Code=GKWS&Category_Code=RPAM (http://www.robodyssey.com/mm5/merchant.mvc?Screen=PROD&Store_Code=RS&Product_Code=GKWS&Category_Code=RPAM)   

Title: Re: gripper/claw
Post by: SmAsH on February 15, 2010, 11:31:19 PM

Quote from: ccdjr106 on February 14, 2010, 06:55:37 PM

ok guys i just bought one that seems to do the job its a little weak tho

Couldn't you just replace the servo with a stronger one?

Title: Re: gripper/claw
Post by: ccdjr106 on February 16, 2010, 08:26:29 AM

the servo is a hitec hs-311 is there a stronger one that is the same size  ??? ???

Title: Re: gripper/claw
Post by: SmAsH on February 16, 2010, 01:57:24 PM

Yes, i found one with almost exact dimensions!
HS-311: http://www.servodatabase.com/servo/hitec/hs-311 (http://www.servodatabase.com/servo/hitec/hs-311)
HS-422: http://www.servodatabase.com/servo/hitec/hs-422 (http://www.servodatabase.com/servo/hitec/hs-422)
HS-485HB: http://www.servodatabase.com/servo/hitec/hs-485hb (http://www.servodatabase.com/servo/hitec/hs-485hb)
The last one is identical to the 311 with heaps more torque but may be a bit expensive.
The second one is slightly stronger with a tiny length difference but is cheaper than the last.

Title: Re: gripper/claw
Post by: ccdjr106 on February 16, 2010, 04:06:34 PM

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXXCZ9&P=FR (http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXXCZ9&P=FR) this it the last one right if it is then its cheaper than my 30 dollar hs311

Title: Re: gripper/claw
Post by: SmAsH on February 16, 2010, 11:24:12 PM

Wow, $30 for a hs-311? Ripoff much?
Yes, that is the right one.