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### Re: Robot Arm C

Posted: January 21st, 2012, 8:53 am
illusionist wrote:
sachleen wrote:
illusionist wrote:If the robot is within the 30 x 30 box at the beginning of the run, but the back end of the robot exits the back edge of the 30 x 30 square during a run, is that a violation? I couldn't find any mention of it in the rules.
How did I miss that...
Thanks.
Actually, let me rephrase my question. Our robot sits on a base that pivots in the center (to turn side to side). The arm is attached to the base and the whole base spins on top of a piece of wood. Now, as we turn side to side, the robot base base (not the piece of wood) will go past the Arm Square. I think this is legal because rule 6.c.v is meant to prevent mobile robot arms. Rule 3.a states that "The Arm is not restricted to these dimensions during the run". So, it should be legal if the robot base crosses the 30 x 30 square during the run, so long as it isn't touching the floor, correct? It's not any different than the actual arm crossing the square.

### Re: Robot Arm C

Posted: January 21st, 2012, 9:06 am
illusionist wrote: Actually, let me rephrase my question. Our robot sits on a base that pivots in the center (to turn side to side). The arm is attached to the base and the whole base spins on top of a piece of wood. Now, as we turn side to side, the robot base base (not the piece of wood) will go past the Arm Square. I think this is legal because rule 6.c.v is meant to prevent mobile robot arms. Rule 3.a states that "The Arm is not restricted to these dimensions during the run". So, it should be legal if the robot base crosses the 30 x 30 square during the run, so long as it isn't touching the floor, correct? It's not any different than the actual arm crossing the square.
Yes, that's legal and within the spirit of the rules (however this is not the place for official clarifications, etc etc

### Re: Robot Arm C

Posted: January 25th, 2012, 12:03 pm
Does anyone know if the robot can be tethered to the base or does it have to be controlled remotely?

### Re: Robot Arm C

Posted: January 25th, 2012, 12:04 pm
I meant to say the remote can be tethered to the base with wires!>

### Re: Robot Arm C

Posted: January 25th, 2012, 12:10 pm
JennMichaels wrote:I meant to say the remote can be tethered to the base with wires!>
It can be attached by wires, so long as the wires don't physically move the robot or base.

### Re: Robot Arm C

Posted: January 27th, 2012, 9:07 pm
Anyone got tips for a claw design? The Vex kit has a custom claw, but it's awfully expensive (\$9.99 for shipping?!). I've got a servo at the ready — just not sure how to design the pinchers.

http://www.vexrobotics.com/276-2212.html

### Re: Robot Arm C

Posted: January 28th, 2012, 11:04 am
Primate wrote:Anyone got tips for a claw design? The Vex kit has a custom claw, but it's awfully expensive (\$9.99 for shipping?!). I've got a servo at the ready — just not sure how to design the pinchers.

http://www.vexrobotics.com/276-2212.html
And it's a little bigger than what you would need/want for this event.

### Re: Robot Arm C

Posted: January 28th, 2012, 3:29 pm
Primate wrote:Anyone got tips for a claw design? The Vex kit has a custom claw, but it's awfully expensive (\$9.99 for shipping?!). I've got a servo at the ready — just not sure how to design the pinchers.

http://www.vexrobotics.com/276-2212.html
I'm just buying a claw from Lynxmotion, I'd rather spend time fine tuning the rest of my design than spend that time building my own claw. There are plenty of claws out there, sparkfun, robotshop, etc all have them.

### Re: Robot Arm C

Posted: January 28th, 2012, 4:13 pm
Agreed, starpug. Are you using an electromagnet, too? It seems rather superfluous if you've got a claw capable of picking up the batteries. Unless it's powerful to grab all the nails at once, I suppose.

### Re: Robot Arm C

Posted: January 28th, 2012, 5:29 pm
Considering the fact that an electromagnet would probably end up counting as another motor, no I'm not planning on an electromagnet.