Re: Team 1902 Roller Grabber Teaser
 

...chop saw :cool:

Re: Team 1902 Roller Grabber Teaser
 

We are thinking of dropping the speed, but only slightly, using Banebots in place of the Cims as the Cims are probably overpowered for this application. The cims were all we had to prototype with. A "gripped" tube will be detected by a limit switch on the back of gripper. We are debating the need for an encoder to sense the rotation and control the speed.

The tube is captured by not allowing the wheels to back drive, if you watch closely when the tubes are released the wheels are driven backwards. We'll make sure to have the controls in place to keep that from happening.

The cool thing about the roller gripper is that it can allow for "easy" tube manipulation ala 233 in 2007. We found that this can be difficult on the points of the square and triangle but every semi circular cross section is mostly adjustable.

Adam, the tools in the video are at a mentors house, who was assisting in the fabrication of the gripper.

And of course this mentors house does come fully equipped with a chop saw.

Re: Team 1902 Roller Grabber Teaser
 

Excellent! Looks great guys! Hopefully you make it to Einstein this year too!

Good Luck, and see you in Florida!

Re: Team 1902 Roller Grabber Teaser
 

I'm an avid believer that no shop is fully equipped unless it has a chop saw.

Also, can any of you guys expand on the Modulox system? I've been trying to find info on it, but it doesn't seem like there is much. Is it just a "universal" gearbox of sorts?

Re: Team 1902 Roller Grabber Teaser
 

Looks like an awesome prototype!

Horizontal band saw > chop saw.

Re: Team 1902 Roller Grabber Teaser
 

The Modulox system is a modular gearbox that utilizes keyed bearing blocks in machined slots to construct nearly limitless gearbox outputs, gear ratios, and arrangements. It uses standard sizes and hex bore gears (both .375" and .500") to make it easy to configure only requiring a set of Allen Keys. Their is a walk through at the top of Modulox.com website that describes how the system works. And the kits are being sold by AndyMark.com here:

We used it on our gripper for two purposes, to adjust the height of the rollers so we could dial in the perfect distance for the tubes as well as to adjust the gear ratios up and down a bit. It made the prototyping process quite easy.

/edit Oh and Art, you speak blasphemous words sir. Red dots coming your way.

Re: Team 1902 Roller Grabber Teaser
 

We were just actually rearranging the MechE department machine shop at Iowa State.

The chop saw got stuck under a bench out of the way as everyone went straight for the horizontal bandsaw...

Re: Team 1902 Roller Grabber Teaser
 

How hard does it actually grip the tube?