Team 254 Presents: Deadlift Technical Binder 2015

[Cherry254]

Team 254 Presents: Deadlift Technical Binder. The binder can be found here. If you have any questions or want more specifications, feel free to ask!

[thatprogrammer]

Finally! Is code next?

[Cherry254]

Code will be coming out soon!

[thatprogrammer]

1.How are the carriages driven up and down? They appear to be attached to timing belts through some type of clip?

2. What type of bearings did you use for your elevator?

3. What types of belt did you use in your elevator?

4. How did you install your chain in the tubing?

5. Are you using the talon srx or victor SP?

[Eugene Fang]

*effect

:-\

[asid61]

This is a great resource! Thank you for releasing it.

[Jared]

As always, the design binder is amazing.
I've got a few questions about the design process and the robot itself.

From what I can see, you guys have almost all of the robot in CAD before you start making parts for systems other than drive. At what point in the season do you finish drivebase CAD and the rest of the CAD? How many people do you have on your CAD team, and how long do they work to get it done?

Finally, does your team use any type of version control for SolidWorks, either EPDM or workgroup? If so, what type of server/computer does it run on?

It looks like you had no way to adjust chain tension this year. Would you recommend running a chain in tube drive system with no tensioners in a more aggressive game, or would you probably switch back to an adjustable and accessible design?

I've also seen your team run 3mm pitch pulleys off the output shaft of the RS-775 motors many times. Are these pulleys you make yourselves with a press fit for the motor shaft, or are they something else?

What material was used for the friction brakes?

[kgzak]

When you release the code will the simulator also be released? I'd love to see it.

[wendells]

Thank You Team 254! Simple and effective process.

[thatprogrammer]

Is it just me, or did one of 254's mentors post a reply, only for it to disappear?

[Knufire]

If you guys are willing, I'd love a more in depth overview of the brake system used.

[Travis Covington]

Originally Posted by thatprogrammer

Is it just me, or did one of 254's mentors post a reply, only for it to disappear?

I did. Alex will add to what I had. He had some additional insight specific to the assembly and maintenance.

[Joe G.]

Originally Posted by Knufire

If you guys are willing, I'd love a more in depth overview of the brake system used.

If I recall correctly from my visit to their pit in St. Louis, it's dead simple. Literally just metal on metal contact when the piston is engaged. The pressure and friction are enough to stop the elevator.

[asid61]

Originally Posted by Joe G.

If I recall correctly from my visit to their pit in St. Louis, it's dead simple. Literally just metal on metal contact when the piston is engaged. The pressure and friction are enough to stop the elevator.

When I looked at it, it looked like there was an odd rough brown material, not something like aluminum on aluminum.

[Travis Covington]

Originally Posted by asid61

When I looked at it, it looked like there was an odd rough brown material, not something like aluminum on aluminum.

We used 410 Stainless Steel to make a "disc" that pushed against a High Friction Molded Brake & Clutch Lining Sheet. It works just like a disc brake, except the forces are applied axially about the point of rotation.

As you can see, the disc spins and slides on a 3/8" hex shaft. This allowed us to install the disc brake outside of the gearbox. It was the smallest solution we could come up with.

See below: