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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.
Discussion
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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
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Originally Posted by squirrel
see if you can get the arm to weigh 10 pounds or less...5 would be about right
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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
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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.
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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.
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<R45> Motors specifically permitted on 2011 FRC ROBOTS include: C. one or two additional 2½” CIM motors (part #FR801-001 and/or M4-R0062-12) in addition to those provided in the KOP. This means that up to four, and no more, 2½” CIM motors can be used on the ROBOT, |
19-01-2011 12:54
Chris is me
Re: pic: 2791 Concept Arm Frame
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Originally Posted by scottydoh
Be careful of rule <R45>, It appears that you have three CIM motors on each of those drive gearboxes.
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19-01-2011 13:19
Joe Ross
Re: pic: 2791 Concept Arm Frame
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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.
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19-01-2011 17:10
scottydoh
Re: pic: 2791 Concept Arm Frame
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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.
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