Polycord

[Chuck_Glick]

Hrm, seems everyone is forgetting about that hollow black tubing that we all have available to us...

Anyone though about using the pneumatic tubing?

3/8" bend radius; so it would fit around the white spacers nicely. All you have to do is figure out a way to make a loop. (Hollow polycord uses a barbed plug method. Try using your plastic sheet allowance or maybe even some other vex components to make your own plug).

This is something I have been wanting to play with for a while, but haven't had the time to do so. Maybe someone will beat me to it... (please! less work for me )

-Chuck

[AndrewRemmers1902]

I might do this for you chuck. As I have been thinking about these for a while. The problem though is that poly cord is a happy medium between the elasticity of surgical tubing and strength of pneumatics tubing. If there is a way do use it I will update. Another problem is getting power to the tube. On a spacer you need to put a set screw inside unless you use some kind of friction plate or clutch- always a possibility.

I'll work on this when I get home.

Time for my last final

- Andrew

[dontworryaboutit]

The problem with pneumatic tubing is that it isn't stretchy and does not have a whole lot of friction (more than string, less than latex tubing).

For powering, I would think a roller with mesh (anti-slip mat) or adhesive foam should do the job, provided the rollers are tensioned properly.

I'm not sure how well ratchet gears would work (in one direction only), but I guess you could try that if you really needed more grip (although I doubt it will be practical).

[AndrewRemmers1902]

I'm at work right now waiting for my boss to get back. I have already designed a small prototype using multiple variants of materials as pullies.

Once I get approval for the lathe I will machine them and will build something tonight.

- Andrew