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5

There is also ready to use commercial solution from Adafruit, called "slip ring" http://www.adafruit.com/products/736 The only problem is the max speed, which is only 300rpm, but probably you won't get any better with a custom solution.


4

I think this is a great question. The two basic options are make it yourself or have someone else make it. EDIT: check the bottom for a third option... Make it yourself To make it yourself you need to choose a material and manufacturing process for the part, then acquire the material and skills needed. (Usually people select a process they know how to do ...


4

Actually, you can perform most milling operations with a file, a micrometer, and patience.


3

The problem with asking for a specific answer without providing all the requirements (it must do this, it can't do that, etc.) is that any answer becomes a circular argument as to what might work or what won't. There are many possible answers, there are many possible designs. What you are asking is this: "Go find me a rock." Then someone offers up a rock ...


3

I would make an X shape using L channel or U channel going from corner to corner on the upper side. It is much easier to bend a flat piece of metal, plastic, wood, etc than it is to stretch or compress the same material. Think of I beams in buildings, the material at right angles causes the beam to have much more strength. https://www.mcmaster.com/#aluminum-...


3

Look for a makerspace in your area, in boston there is http://artisansasylum.com/site/ they have various CNC machines, laser cutters, Etc. which with some simple low cost training you are allowed to use.


3

As John Williams points out you can find desktop metal milling machines that are reasonably priced. However if you want to work with metal make sure the machine you're buying is designed for that. There are a few major differences between metal cutting and machines designed for wood or for additive processes (3D printers): The cutting forces with metal (...


3

In recent years, there is a surge in low-cost desktop-size home/DIY/High School level CNC, milling machine, router and 3D printers (common 3D motions parts, just the 'head' differs). Hundreds of companies do sell assembled unit and/or kits. I do not have hands-on experience on this myself and cannot offer solid help. But since many people make/buy/sell ...


2

If your number n is small enough then there are simpler and more durable ways to hook things up. Car steering wheel style: these wheels turn ~ 5 times from steering lock to lock, I understand they use coiled flat flex cable that coils around the steering shaft with 90degree bends/turns on the ends to mate to connectors on the steering wheel and the static ...


1

If you need to use a chassis so poorly made, its manufacturer has pushed you out of the realm of engineering and into tinkering. I would suggest that you release yourself from the desire for precision, elegance, and beauty. Instead, embrace the embarrassment of cardboard, foamcore, X-acto knives, hot glue, and toothpicks. Especially when it's necessary, such ...


1

It is difficult to provide a specific answer due to not knowing details of your design, but consider these factors for the deflection of a beam. They should give you ideas. For a beam supported at the endpoints, with a load in the center, the deflection increases if: The load increases. The distance between endpoints increases. The deflection decreases if ...


1

I don't see the problem here. You just need to pass a metal shaft across the body on the underside. This shaft needs to fit the wheels but I suppose that part is sorted already. To fit the shaft to the body you could buy attachment points or make them yourself (3d print or adapt something, for instance cut a few short lengths from a thin copper pipe as used ...


1

For fast rotations, you can turn to transmitting information using wireless protocols or light. e.g. a turret with laser for detection purpose, can have its own separate circuit and power on a rotating plane, while information is sent using a LED to its base that have a light receiver. For slow rotations, use a Slip Ring. Be careful as this solution is not ...


1

This is a problem I've thought a lot about, but haven't yet come up with a good solution. The only ideas I've had thus far are: Custom turntable: if it's only a few wires, a custom turntable could have a brush/copper contact system. This might have a problem with noise, however. Create a separate control system for the head (include battery, ...


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