Yes, it's beginning to sound as if you've wired it up in some strange and original way :)The way it would normally be connected, to route power from batteries in the tread section to the torso is not a problem. I'm using one for this and it certainly doesn't reverse voltage with the spin of the torso. Perhaps we would need to see a circuit diagram to understand what you've done. Mike H
-------------------------------------Daniel,
I'm not an electronics expert by any means, but it sounds like you are using the slip ring in a manner that it's not designed for. It's intended to allow an uninterrupted signal (or power) to rotate a full 360 degrees. In other words, as a conduit from the lower half of the robot (which does not turn) to the upper half, which can rotate fully without twisting any wires. You would use it as your main power feed to all systems. If reversing a motor, the motor polarity should be switched, not the power source feeding it.
If the slip ring uses any common conductor points (such as a negative), then switching the polarity of a pair of leads will switch all of them.
At least that's my take on it.Posted by:
warpig@cyberpigstudio.com
Hi BobSo I was using the slip ring not only to change direction for my waist rotation but had used it to channel power to my torso and head components. It I changed waist rotation wouldn't that also change current flow to those components ?
Daniel
Sent from my iPhone
On Nov 30, 2015, at 6:00 PM, Bob Darlington
rdarlington@gmail.com [B9Builders] wrote:
This doesn't make sense to me. The slip ring doesn't know what direction it's moving, nor does it have any way to produce electricity. It might as well be a magic cable that lets you twist it round and round. Can you explain in more detail?
I've used slip rings a lot in the past, including for passing dual gigabit ethernet connections up to a rotating antenna/transmitter assembly for ground to air communications. This included data, plus power for the Motorola radios, plus power to the gimbals which also had their own slip rings. They simply act as a multi-conductor cable.
-Bob
On Mon, Nov 30, 2015 at 3:57 PM, Daniel Angel
danielscottangel@gmail.com [B9Builders] wrote:
I think I've discovered why I was getting a reversal of voltage in my slip ring. These rings are primarily used to provide continuous current in one direction (like for a wind tubine). Because I was using this for waist rotation (changing direction back and forth) the voltage reversed when the rotating loop detected a change in direction of the magnetic field lines. The voltage alternated simply because the orientation of the fixed field reversed relative to the rotating coil when I stopped and reversed waist rotation. My mistake was using slip ring connections for all my power (light boards, receiver, etc). Its fine for waist rotation but I need to channel separate and unchanging connections for those other systems.
Lesson learned
D. Scott
On Tue, Nov 24, 2015 at 10:13 AM, Bob Ross
robertr609@yahoo.com [B9Builders] wrote:
Daniel,
I agree with Bob D - sounds like you're shorting the power supply.
Make sure both sides of the slip ring are connected as you intended; i.e., you haven't crisscrossed two wires.
If above OK, disconnect both sides of the slip ring and verify with an ohm meter that none of the wires/rings are shorted together internal to the slip ring.
Bob Ross
From: "Daniel
danielscottangel@gmail.com [B9Builders]"
To: B9Builders@yahoogroups.com
Sent: Monday, November 23, 2015 6:59 PM
Subject: Re: [B9Builders] Question for anyone using Genssi 150W 12V Power Supply
The odd thing is the power block works fine with the second slip ring connection. I suppose my connection clip could be faulty. I'll switch it out and test it again.
Daniel
Sent from my iPhone
On Nov 23, 2015, at 3:55 PM, Bob Darlington
rdarlington@gmail.com [B9Builders] wrote:
Are you sure you're not shorting your supply?
It's common to have guard rings in there to somewhat isolate electrical noise from the other connections. These would all be grounded/common.
-Bob
On Mon, Nov 23, 2015 at 4:49 PM, Daniel Angel
danielscottangel@gmail.com [B9Builders] wrote:
I've installed a slip ring into my bottom CSS plate. My problem is
when I connect a specific power distribution block to one particular
slip ring connection my Genssi power supply begins to reset (clicks
and the led indicator blinks). If I connect that block to a different
slip ring connection there is no reset. Power flow is fine.
I'm thinking that first slip ring connection is faulty somewhere in the ring.
Anyone else using the Genssi have a similar reset experience?
Thanks,
Daniel
--
Conquering the world one robot at a time....
--
Conquering the world one robot at a time....