Slip Rings

Has anyone thought about using slip rings to allow unlimited rotating on launchers?

but how

Yes, but you can’t build one (as far as we can tell) within the confines of the rules. If you find a way to do it, that’d be a huge help. But even in VEXU, I don’t think it’s possible.

In the past, we’ve used about 3 feet of cable on places that spin a lot. It’s a nightmare to wire that. And the guy who’s in charge of it will hate you for designing the mechanism. But it does work.

What rules specifically would be broken with your concept?

Which concept? The concept of a slip-ring?

You just can’t do it. You have to connect all VEX motors with VEX wire. The only electrical stuff we’re allowed to mess with is for sensors. And in no way can a spinning turret with a cannon on it be considered a sensor.

A slip ring is an electromechanical device that allows the transmission of power and electrical signals from a stationary to a rotating structure. A slip ring can be used in any electromechanical system that requires rotation while transmitting power or signals. It can improve mechanical performance, simplify system operation and eliminate damage-prone wires dangling from movable joints.

how the heck are you going to make one with vex parts? even in VEXU.

please enlighten me.


here are some rules I would be worried about breaking.

l. Commercially available items used solely for the purpose of bundling or wrapping of 2-wire, 3-wire, 4-wire cables, and pneumatic tubing, for the purposes of protection, organization, or management are allowed. This includes but is not limited to electrical tape, cable carrier, cable track, etc. Note: it is up to inspectors to determine whether a component is serving a function beyond protecting and managing cables.

You are not allowed to modify wires in VRC. Not to mention, you’d have to be careful with the safety issues of having exposed wire leads. In VEX U, you are allowed to use other sensors and electronics, but those sensors and electronics are not allowed to directly electrically interface with motors. Therefore, a slip ring would only be legal in VEX U for sensors or other electronics.

Even if you were allowed, I wouldn’t try to use slip rings. Unless done properly, they can cause a lot of noise on a system and cause motors to kick in and out. David Byrne used to have some slip rings connecting his body to his brain and you can see what it did for him:

assuming the rings and brushes are almost perfectly made, it wouldnt put any noise on the system

worst-case scenario the positive and negative on the 3-wire shorts and half your robot stops working

It took a while, but I have come up with a viable solution for a LEGAL motor slip ring for HS. there will be a reveal when it gets put on the bot.