18-01-2011 20:04

Chris is me

Re: pic: 2791 Concept Arm Frame

Probably should have sent this as an email, whoops.

Right now there's no room on the arm pivot for a sprocket or anything behind the pivot point. I'm not sure how to fix this but it looks like as long as the long 2x1 pieces are mounted on the back like that it'll be a problem.

19-01-2011 00:22

MrForbes

Re: pic: 2791 Concept Arm Frame

see if you can get the arm to weigh 10 pounds or less...5 would be about right

then yeah, it's overkill....

19-01-2011 01:09

Chris is me

Re: pic: 2791 Concept Arm Frame

Quote:

Originally Posted by squirrel see if you can get the arm to weigh 10 pounds or less...5 would be about right

19-01-2011 09:54

MrForbes

Re: pic: 2791 Concept Arm Frame

They make 1.5" ABS sewer pipe too, it's lighter and tougher than PVC, and looks so cool since it's black. We're currently planning our arm to be made of 1.5" ABS at the manipulator end, and 2" ABS at the arm pivot end...it'll do an "extendo" maneuver at the beginning of the match to become a longer arm. If it all works, that is. The prototype is assembled, but not yet powered or mounted to a robot.

19-01-2011 09:59

gvarndell

Re: pic: 2791 Concept Arm Frame

That's gonna make one heck of an obstacle when it's lying on its side in the middle of the field.

19-01-2011 10:10

Chris is me

Re: pic: 2791 Concept Arm Frame

Quote:

Originally Posted by gvarndell That's gonna make one heck of an obstacle when it's lying on its side in the middle of the field.

19-01-2011 12:44

scottydoh

Re: pic: 2791 Concept Arm Frame

Be careful of rule <R45>, It appears that you have three CIM motors on each of those drive gearboxes.

19-01-2011 12:54

Chris is me

Re: pic: 2791 Concept Arm Frame

Quote:

Originally Posted by scottydoh Be careful of rule <R45>, It appears that you have three CIM motors on each of those drive gearboxes.

19-01-2011 13:19

Joe Ross

Re: pic: 2791 Concept Arm Frame

Quote:

Originally Posted by Sh1ine Please forgive the poor Photoshop Job. I am looking for a bit of advice. Although we have not nailed our arm manipulator design yet we want to be able to get the fixed upright welded when the rest of the frame is in the shop. Currently I have it drawn with 1/16" wall tube. The two vertical pieces are 2x1 the rest are 1x1. Do you think that this system will be strong enough to support a arm that can reach to the top peg and weights around 30 or less lbs? Is it overkill? Thanks.

19-01-2011 17:10

scottydoh

Re: pic: 2791 Concept Arm Frame

Quote:

Originally Posted by Chris is me We have 3 CIMs in the model, but we did that just because there wasn't a BB + CIMple Box model available while designing.