Re: Slip Rings

Post Reply
toblueiis
Posts: 270
Joined: Mon May 27, 2013 11:11 am

Re: Slip Rings

Post by toblueiis » Mon Nov 02, 2015 6:08 pm

Hello,

I was noticing the large numbers of connections mentioned on the slip rings. With this, I was thinking about another approach to this data transmission.

A while back, I was considering a project that had a stationary and rotating part, and had considered using an LED to transmit a data signal to a sensor. It allowed for rotation, and to still communicate the data signal. The would be facing each other for this data communication. They would have to be in the center of rotation, which here would be a problem if you need slip rings in the center for power transmission. But, it is a good thought to keep in the back of your mind for future projects. It would be nice to come up with a circular optical sensor that could go around a slip ring, or maybe better to have a single sensor and a ring of LEDs in series that send the signal to the sensor at any point in the rotation.

This being said, slip rings do have a real good point when it comes to testing and troubleshooting. They are very simple, in and out.

Thanks,
David M.

--------------------------------------------
On Mon, 11/2/15, David Schulpius dschulpius@wi.rr.com [B9Builders] wrote:

Subject: Re: [B9Builders] Slip Rings
To: "Tobor001@aol.com [B9Builders]"
Date: Monday, November 2, 2015, 1:48 PM

Thanks for the info Bob. This
stuff is good to know. It's great to have options. You
say the one's you are use are only rated for 2 amps.
That looks like the smallest in this 300 series. Looks like
they have two sizes in this series with several models that
will handle up to 10 amps. Much larger wire also. I wonder
if the larger 16 gage wire is only for the power
distribution and there are smaller ones for signal.
Dave Schulpius
On Nov 2, 2015 1:30 PM,
"Bob Ross robertr609@yahoo.com
[B9Builders]"
wrote:

























We use
these on all the R2s for the body to dome connections since
the dome spins 360. Normally use either the 15 or
24 wire slip rings. They work great providing you're
careful with the wires mechanically and electrically. They
are very fine - either 28ga or 26ga depending on the
manufacturer.
Mechanically,
don't flex them a lot. Some of the guys take the upper
rotating wires and connect them into the dome directly. As
the dome is taken on & off the wires flex, get pulled,
etc. and eventually break. Its beneficial to have the
rotating wire bundle go to a connector that's mounted to
the part that's rotating. Then you can plug into that
connector for running to whatever you're hooking up. I
use either 15 or 25 pin D connectors depending on the size
of the slip ring.
Electrically, don't run a lot of
current through them. They're rated at 2A/ring, but it
seems like a lot considering the small size of the slip ring
and its wires. I parallel as many as I can for power and
ground leaving the rest for signals. And this is for an R2
dome that has relatively low power draw in the
dome. For the more power hungry B9s, you may have to use
the much more expensive industrial slip rings.

Bob
Ross

Industrial Types
Signal
and Power300
Series Miniature Slip Rings - Orbex Group
300
Series Miniature Slip Rings - Orbex
GroupView
on www.slipring.comPreview
by Yahoo Powerhttp://www.slipring.com/documents/Orbex600DataSheet_DS600R1.1.pdf




From:
"Gordon Smith gordonrbt@yahoo.com
[B9Builders]"
To: "B9Builders@yahoogroups.com"


Sent: Sunday, November
1, 2015 1:14 AM
Subject: Re:
[B9Builders] Slip Rings













I just
saw a 24 conductor slip ring for sale at Electronic
Goldmine for $10.



From:
"Bob Darlington rdarlington@gmail.com
[B9Builders]"
To: B9 Robots Builders
Club

Sent: Saturday, October
31, 2015 8:14 PM
Subject: Re:
[B9Builders] Slip Rings













Yeah, or at least I'm
planning to. I bought the slip ring that was being sold
in a group buy through the R2 club. It's something
like 20 conductors and fairly small.
-Bob
On Sat, Oct 31, 2015 at 7:01 PM, Daniel
Angel danielscottangel@gmail.com
[B9Builders]
wrote:

























Anyone using slip rings on their build?



D.Scott

--

Conquering the world one robot at a time....













































































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warpig2011
Posts: 343
Joined: Thu Aug 18, 2011 8:42 pm

Re: Slip Rings

Post by warpig2011 » Mon Nov 02, 2015 8:05 pm

Where's Gwen? Her G-Bot uses a slip ring; a heavy-duty one.

I bought a similar one to have on hand when I get to building my B9. It's a Mercotac, eight conductor; 2 at 4A and 6 at 30A. All metal. Not cheap, but I'll never have to replace it. Image

That said, there are some heavy-duty ones on "That Popular Auction Site". If nothing else, the auctions are fun to read because of the bad translations...
Top
toblueiis
Posts: 270
Joined: Mon May 27, 2013 11:11 am

Re: Slip Rings

Post by toblueiis » Mon Nov 02, 2015 8:20 pm

hello,

wow, 30 amps is pretty good for a slip ring, and six to boot....

thanks,
David M.
--------------------------------------------
On Mon, 11/2/15, warpig@cyberpigstudio.com [B9Builders] wrote:

Subject: Re: [B9Builders] Slip Rings
To: B9Builders@yahoogroups.com
Date: Monday, November 2, 2015, 7:05 PM

Where's Gwen? Her G-Bot uses a slip ring; a
heavy-duty one.

I bought a
similar one to have on hand when I get to building my B9.
It's a Mercotac, eight conductor; 2 at 4A and 6 at 30A.
All metal. Not cheap, but I'll never have to replace it.


That said, there are
some heavy-duty ones on "That Popular Auction
Site". If nothing else, the auctions are fun to read
because of the bad translations...









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Gwen
Posts: 30
Joined: Sat Jun 16, 2007 10:23 am

Re: Slip Rings

Post by Gwen » Tue Nov 10, 2015 11:02 pm

I used the Mercotac 830 for a few years.
http://www.mercotac.com/html/830.html

I recently switched to a much cheaper device made for windmills

http://www.ebay.com/itm/Wind-Generator- ... SwU9xUUWrS

because it had more leads and higher current rating.  Much lower tech but
fine for my application.  I wanted to be able to add a direct relay -
controlled cutoff for the G-Bot's Sabertooth drive controller.  Last year he
went out of control in the house when the microcontroller locked up and he
pushed the dining room table across the room before I could get to his off
switch.  Now pulling his power pack kills his drive controller and all his
lights.  Eventually Ill add the hip joint so he can slump too.  So many
upgrades... Oh the pain...


Hope that helps!

Gwen B9-0027   From: B9Builders@yahoogroups.com Sent: Monday, November 2, 2015 8:17 PM To: B9Builders@yahoogroups.com Subject: Re: [B9Builders] Slip Rings    
hello,

wow, 30 amps is pretty good for a slip ring, and six to boot....

thanks,
David M.
--------------------------------------------
On Mon, 11/2/15, warpig@cyberpigstudio.com [B9Builders] wrote:

Subject: Re: [B9Builders] Slip Rings
To: B9Builders@yahoogroups.com
Date: Monday, November 2, 2015, 7:05 PM

Where's Gwen? Her G-Bot uses a slip ring; a
heavy-duty one.

I bought a
similar one to have on hand when I get to building my B9.
It's a Mercotac, eight conductor; 2 at 4A and 6 at 30A.
All metal. Not cheap, but I'll never have to replace it.


That said, there are
some heavy-duty ones on "That Popular Auction
Site". If nothing else, the auctions are fun to read
because of the bad translations...









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Herb
Posts: 80
Joined: Tue Dec 04, 2012 2:20 pm

Re: Slip Rings

Post by Herb » Wed Nov 11, 2015 10:10 am

Sorry Gwen but the mental picture of him being out of control brought a smile to my lips, just like the show. I know you have written about this before, but it really tickles my funny bone. DESTROY!Herb C

Sent from my iPad
On Nov 10, 2015, at 11:02 PM, 'Gwen' gwen4156@comcast.net [B9Builders] wrote:














 














I used the Mercotac 830 for a few years.
http://www.mercotac.com/html/830.html

I recently switched to a much cheaper device made for
windmills

http://www.ebay.com/itm/Wind-Generator- ... SwU9xUUWrS

because it had more leads and higher current
rating.  Much lower tech but
fine for my application.  I wanted to
be able to add a direct relay -
controlled cutoff for the G-Bot's Sabertooth
drive controller.  Last year he
went out of control in the house when
the microcontroller locked up and he
pushed the dining room table across the
room before I could get to his off
switch.  Now pulling his power pack
kills his drive controller and all his
lights.  Eventually Ill add the
hip joint so he can slump too.  So many
upgrades... Oh the
pain...


Hope that helps!

Gwen
B9-0027


 

From: B9Builders@yahoogroups.com

Sent: Monday, November 2, 2015 8:17 PM
To: B9Builders@yahoogroups.com
Subject: Re: [B9Builders] Slip Rings
 
 


hello,

wow, 30 amps is pretty good for a slip ring, and six to
boot....

thanks,
David
M.
--------------------------------------------
On Mon, 11/2/15,
warpig@cyberpigstudio.com [B9Builders]
wrote:

Subject: Re: [B9Builders] Slip Rings
To:
B9Builders@yahoogroups.com
Date: Monday, November 2, 2015, 7:05
PM

Where's Gwen? Her G-Bot uses a slip ring; a
heavy-duty one.


I bought a
similar one to have on hand when I get to building my
B9.
It's a Mercotac, eight conductor; 2 at 4A and 6 at 30A.
All metal. Not
cheap, but I'll never have to replace it.


That said, there
are
some heavy-duty ones on "That Popular Auction
Site". If nothing else,
the auctions are fun to read
because of the bad
translations...









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