What COTS parts would you like to see?

[jwfoss]

-4"x1.5" and 4"x2" Aluminum Wheels with 1/2" Hex Broach
-Anti-backdrive stage for VersaPlanetary
-Disc Brake set up with 1/2" Hex or "Standard" Sprocket Hole Pattern

[Kellen Hill]

Originally Posted by jwfoss

-4"x1.5" and 4"x2" Aluminum Wheels with 1/2" Hex Broach
-Anti-backdrive stage for VersaPlanetary
-Disc Brake set up with 1/2" Hex or "Standard" Sprocket Hole Pattern

For the anti-backdrive stage, you could even add in a switch to the stage, similar to a ratchet wrench, to engage, disengage, or flip the direction of the anti-backdrive.

[Chris is me]

Originally Posted by jwfoss

-Anti-backdrive stage for VersaPlanetary
-Disc Brake set up with 1/2" Hex or "Standard" Sprocket Hole Pattern

Was just thinking about both of these.

An anti-backdrive VP stage would be awesome - that is basically the only feature I miss from the old DeWalt transmissions, and it can't be *that* hard to do, right?

I would really like 4140 pinion gears (at least 18T, 20T, 24T) for high load applications. Aluminum works sometimes, but sometimes you want steel.

[Mk.32]

Originally Posted by jwfoss

-4"x1.5" and 4"x2" Aluminum Wheels with 1/2" Hex Broach
-Anti-backdrive stage for VersaPlanetary
-Disc Brake set up with 1/2" Hex or "Standard" Sprocket Hole Pattern

Discs brake you want eh?
https://electricscooterparts.com/discbrakes.html

I learned that BRK-512 works with BRK-480L and has a hole pattern that is close enough to work with the AM 1.875in hole pattern with number 10s.

[jwfoss]

Originally Posted by Mk.32

Discs brake you want eh?
https://electricscooterparts.com/discbrakes.html

I learned that BRK-512 works with BRK-480L and has a hole pattern that is close enough to work with the AM 1.875in hole pattern with number 10s.

Thanks for the heads up, did you also buy the caliper from the same company? If so which one, and do you have any images of integration into your robot? Thanks!

[Monochron]

Originally Posted by jwfoss

Thanks for the heads up, did you also buy the caliper from the same company? If so which one, and do you have any images of integration into your robot? Thanks!

Seconding!

[Greg Needel]

Originally Posted by Monochron

Seconding!

We used a mechanical brake this year, and had good success integrating one like this onto the robot. https://www.ombwarehouse.com/univers...e-caliper.html


We actually just used a sprocket as the disk without problems.

[Mk.32]

Originally Posted by jwfoss

Thanks for the heads up, did you also buy the caliper from the same company? If so which one, and do you have any images of integration into your robot? Thanks!

I have listed both model numbers for the disk and caliper: BRK-512 and BRK-480L. You should find both parts on the website. The caliper uses a regular old bike cable.

Heh.. ironically this was an happy accident. As I did not buy these parts for FRC but for a gokart I race at makerfaires (us mentors gotta have something to build in the off season). And I used AM tires for the front, and realized that everything lined up nicely so it saved me the trouble of making an adapter hub.

You can also make your own disks to if you have basic milling abilities, take piece of .09 flat stock and drill the holes you want into it. You do not need any of the fancy cutouts and speed holes/etc of the commercial disks. Just need the stock to be flat.

[Ryan Dognaux]

Originally Posted by Mk.32

Discs brake you want eh?
https://electricscooterparts.com/discbrakes.html

I learned that BRK-512 works with BRK-480L and has a hole pattern that is close enough to work with the AM 1.875in hole pattern with number 10s.

We've also used disc brakes for the past 2 seasons. It was extremely helpful in 2015 for holding our elevator's position without stalling motors.

I'm about 99% sure we purchased this kit from Amazon - https://www.amazon.com/Signswise-Mou...rds=disc+brake Came with 2 disc brakes and 2 caliper kits. Great for a practice bot and competition bot setup.

The hole pattern was close enough to get 3 or 4 bolts aligned to mount a 1/2" hex hub. We used a small pneumatic actuator to pull the caliper's brake cable, worked great. You can see a video of it here.