rotating electric contact

[joy123]

hello ,

currently i am working in a project where i have to use a motor to spin a metal jig and in some stage of spinning i have to transfer 5v dc through the metal jig for a chemical reaction. my wire which will pass 5v dc will spine and will wear out . is there any special wire or contact we can use to avoid twisting? any suggestion?


thanks

 

[jpanhalt]

They are called "slip rings." If your current needs aren't too great, you might use the commutator of a DC motor. Commercial assemblies are available, but are probably expensive. For example, they are needed for electrically controlled pitch in wind generators (**broken link removed** ).

Can you say a little more about the chemistry involved. I have done a fair bit of electrochemistry and may be able to suggest an alternative arrangement.

John

 

[kak111]

Mercotac® Rotary Electrical Connectors
Rotary Electrical Connectors vs. Brush Slip Rings

http://www.tempco.com/Catalog/Section 12-pdf/Rotating Connectors.pdf

 

[newbharat]

hello ,

currently i am working in a project where i have to use a motor to spin a metal jig and in some stage of spinning i have to transfer 5v dc through the metal jig for a chemical reaction. my wire which will pass 5v dc will spine and will wear out . is there any special wire or contact we can use to avoid twisting? any suggestion?


thanks

I am not much aware about it but i know expert they can help you visit **broken link removed**

ask them question motor and you will have answer.

 

[joy123]

They are called "slip rings." If your current needs aren't too great, you might use the commutator of a DC motor. Commercial assemblies are available, but are probably expensive. For example, they are needed for electrically controlled pitch in wind generators (**broken link removed** ).

Can you say a little more about the chemistry involved. I have done a fair bit of electrochemistry and may be able to suggest an alternative arrangement.

John

hi john,

thanks for replay, i am working on a electropolishing center for medical equipment. i have a anode which hold all the parts and go into EP solution bath. anode is clamp free. i hope you familier with ep process. when i put my anode into the EP SOLUTION, i have to turn on 5v dc (ripple free) for 5/8 second into the anode while it is spinning. does it makes any sense to you?

maintaing the quality of 5v dc(ripple free) is very important to get a stable result. is it possible to get a slip ring which dont effect the quality of DC?
thanks
joy

 

[jpanhalt]

Most plating processes with which I am familiar have fixed electrodes and agitate the solution. I suspect EP is similar. Why not vigorously stir the EP solution and have a fixed anode?

As for slip rings, I don't know quantitatively how much electrical noise they produce, but I suspect the rubbing contacts must produce some. The ones that use mercury are said to be very low noise (Slip ring - Wikipedia, the free encyclopedia). A web search for "mercury slip rings" will yield many vendors.

John

 

[joy123]

HI John,

It's not the ep solution I need to stir, it's the anode I need to rotate in uniform circular motion to keep all the parts touching the anode in a way that's suits our quality requirements.