975's Working Arm

[JoshD]

Well our first 3 1/2 weeks have been busy. This, as of tonight is our design. There are still kinks to work out, and there is still discussion on if we should can the hurdling idea. Anyway enjoy!

P.S. sorry about the weird turn towards the end, it was filmed with a digital camera and I didn't realize it would view sideways.

Click!!

[DarkFlame145]

very nice, seams to work very well.

[GaryVoshol]

How far forward does that arm go? It looks like you're way outside the 80" limit.

[EricH]

Originally Posted by GaryVoshol

How far forward does that arm go? It looks like you're way outside the 80" limit.

Dunno, Gary. Looks like it's about 4 ft. long (guesstimate based on robot height). That's 48", some of which is over the robot. They're close, but I'm not sure they are over yet. If it is over 80"...Then their mentor is right about it not working.

[Qbranch]

Interesting gripper design.

I can't really tell... is this thing rotating to the up position under it's own power? It seems like someone was always holding on to it.

If it is powered, does it spin with enough force and speed to hurdle the ball?

It also sounds like there's a motor that was running a lot in the back ground, and it seemed to be loosely coincident with the gripper opening and closing. Is your gripper electromechanical?

Cool.

-q

[GaryVoshol]

Originally Posted by GaryVoshol

How far forward does that arm go? It looks like you're way outside the 80" limit.

Originally Posted by EricH

Dunno, Gary. Looks like it's about 4 ft. long (guesstimate based on robot height). That's 48", some of which is over the robot. They're close, but I'm not sure they are over yet. If it is over 80"...Then their mentor is right about it not working.

Yeah, we don't have a good angle to see it. It just seems to be way in front of the bot as its moving up in the arc. Another factor is the width of the grabber around the ball, which could add a few inches to the maximum size. I was just issuing a friendly warning, in case they had forgotten to consider it.

I also presume that after they get the rest of the guts put in, they won't have to have 2-3 people around the bot to balance it!

[JoshD]

Well it's on our nonmoving chassis so there is no weight under it. Also, it has two mechanisms, a motor to lift the arm, which it was doing under its on power, and a motor that powers a lead screw that moves the arms in and out. As for the 80" rule, I'm pretty sure were ok there, but we haven't check yet.

And yes, it does fit in the 28 by 38 starting configuration.

[flyingcrayons]

our team has something like that. thats all i can say. it looks good though.

[Madison]

Do you have a Globe Motor set into a Banebots planetary gearbox? What gearbox are you using and at what ratio?

[JoshD]

I believe we are just running the lead screw striaght off the Banebots motor. We also moved the lead screw because in it's original position it kept binding.