pic: 114 CAD idea

[CraigHickman]

[cdm-description=photo]26077[/cdm-description]

[chris31]

Its looks nice. However I think the arm might be heavy. Do you have an estimate weight of both the arm and the whole robot?

[Billfred]

I'm willing to bet it can be slimmed down as well, but I've got to ask the other pressing questions:

1) How would you have it expand or retract?
2) Is the arm designed to tilt, a la 233 or 1251 in 2005?

[CraigHickman]

The arm tilts, and will extend via cable pulled by a winch like mechanism at the base. As far as the mechanism to do both of these, I haven't added it in as of yet.

Weight on the arm is about 10 pounds.

[Dan Petrovic]

Do you really need box tubing for the whole arm?

In 2005 we had a staged lift almost exactly like that, and it was made of flat stock and angle stock welded together. You could probably save a bit of weight if you do the same.

[Arefin Bari]

Weight on the arm is about 10 pounds.

I am having hard time believing that it is only 10 pounds...

1) How long are the pieces?
2) What is the wall thickness (1/16? 1/8?) on the box tubing?
3) Are those L brackets quarter inch thick?
4) How many of those L brackets you got in that design if they are quarter inch thick?

... the reason I am asking these questions is to see if you miscalculated while you were figuring out the weight for the mechanism.

I would jump up and down if I had 100 pounds to work with for a chassis and electronics (assuming your mechanism would be between 10-20 pounds).

[=Martin=Taylor=]

I really hope the game pieces are intertubes too:)

Any ideas on how you will pick them up? There isn’t a lot of room there for a claw/grabber/(thing).

[CraigHickman]

As far as material choice, this is my first time designing a game object manipulator. Up until now, I've been the drive train guy.

The extrusion for the arm is 1x1 with 1/6th inch wall, at 24 inches long, and the sliders/brackety things are made of delrin, and are 1/4inch thick. I'm probably going to make the thing smaller, but with the grabber I play to design onto the end... I might need to make it thicker. This grabber should be able to passively "slurp" up about 4-5 inner tubes at a time, and then spit them out onto a post. Now all of this is speculative of what I think the game will be.