[TANKS] Re: Turret traversing - circular electrical contacts

2009-02-02 Thread Paul Hilton

Yup, slip rings are expensive.  I've built a fair alternative using four 
ball bearing assemblies, two for each circuit.  Joe Sommer proposed using 
copper clad board etched in a circular pattern, coupled with carbon motor 
brushes.  Of late I have been eyeballing a toy that my daughter has.  It's a 
"ray gun" with several LED's on a rotating head.  In my mind, it must have 
some manner of slip ring assembly.  If only I can spirit the thing away 
without her noticing.

Paul H.
- Original Message - 
From: "Andy Schwartz" 
To: 
Sent: Monday, February 02, 2009 8:22 AM
Subject: [TANKS] Re: Turret traversing - circular electrical contacts


>
> We have explored this idea several times for our R2D2 robots.  About once 
> a
> year someone does a group buy of Slip rings which brings the price down to
> about $50 for a 24 wire slip ring.  A low cost alternative is to use the
> connectors for  a headphone jack.
>
>
> Andy
> - Original Message - 
> From: "HV" 
> To: "R/C Tank Combat" 
> Sent: Monday, February 02, 2009 7:54 AM
> Subject: [TANKS] Re: Turret traversing - circular electrical contacts
>
>
>>
>> Yes it is called a slip ring, and they are expensive.
>> >
>
>
> >
> 



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[TANKS] Re: Brummbar Fighting Compartment

2009-02-02 Thread Chrysanthos Kanellopoulos

Very to scale, just like your Mark/ Panzer IV .  What made you switch from a
rotating turret to a self propelled gun?  Caliper?
Also,  the last return roller could become a compensating idler, with the
proper swing arm and spring.
Chrys




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[TANKS] Re: T-12 Conversion

2009-02-02 Thread jvragu47

No man. We be proliferatin' .

On Feb 2, 11:11 pm, "Susan Gutbrodt"  wrote:
> I thought this was hush-hush until AFTER you got PUFF to sign a
> non-proliferation Treaty.
>
> Kurt (Desert One) G
>
>
>
> - Original Message -
> From: "jvragu47" 
> To: "R/C Tank Combat" 
> Sent: Sunday, February 01, 2009 8:54 PM
> Subject: [TANKS] Re: T-12 Conversion
>
> On Feb 1, 11:23 am, Thomas Lum  wrote:
> > Did the Brummbar have ay side to side barrel movement or was it only 1
> > axis (elevation)?
>
> > Yes. The gun had 10 degrees traverse to either side.- Hide quoted text -
>
> - Show quoted text -
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[TANKS] Re: T-12 Conversion

2009-02-02 Thread Susan Gutbrodt

I thought this was hush-hush until AFTER you got PUFF to sign a 
non-proliferation Treaty.

Kurt (Desert One) G

- Original Message - 
From: "jvragu47" 
To: "R/C Tank Combat" 
Sent: Sunday, February 01, 2009 8:54 PM
Subject: [TANKS] Re: T-12 Conversion




On Feb 1, 11:23 am, Thomas Lum  wrote:
> Did the Brummbar have ay side to side barrel movement or was it only 1
> axis (elevation)?
>
> Yes. The gun had 10 degrees traverse to either side.




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[TANKS] Re: Turret traversing - circular electrical contacts

2009-02-02 Thread Doug Conn

The "best and cheapest answer" award goes to Will. Use wires 


-Original Message-
From: rctankcombat@googlegroups.com [mailto:rctankcom...@googlegroups.com]
On Behalf Of Xirus
Sent: Monday, February 02, 2009 5:49 PM
To: R/C Tank Combat
Subject: [TANKS] Re: Turret traversing - circular electrical contacts


The best and cheapest answer is, scale model railroad tracks. Hobby
stores sell flex rail in lengths of 3 feet and they are very flexible,
Even more so when you take the rails off the plastic.

You can use one rail as your common ground like on a car and for every
device you want to power you would need a separate rail to carry the
current through.

If you own a rotozip/dremel/router you can make notches in your turret
ring to seat these in to. On the turret side all you would need to
make is small springy contacts that touch the rail as soon as the
turret is on. You could make these out of thin sheet copper that hobby
stores sell.

If you dont want to do this then you can make round notches around the
turret ring and use a copper wire like the type that ground a house.
wont be as neat looking but if you do a good job it should work.

I will be doing this with my King Tiger.

Here is an example of what flex rail looks like.

http://www.dallasmodelworks.com/products/atlas/accessories/150-500.gif



On Feb 2, 12:22 pm, wsmon...@aim.com wrote:
>  Just let the wires twist. How many times are you going rotate in the same
direction. The wires going too the turret are small gauge and can be twisted
many time with no problems.
>
> Will Montgomery
>
> -Original Message-
> From: Chris Malton 
> To: rctankcombat@googlegroups.com
> Sent: Mon, 2 Feb 2009 3:52 am
> Subject: [TANKS] Re: Turret traversing - circular electrical contacts
>
> It makes perfect sense to me.
>
> I know exactly what you want to do, it's just a question of how.  I
> think what you'd need is a circle of metal all the way around for each
> connection you want to make, and then some kind of electrically
> connected wheel that rides on these.  You'd actually want 3 wheels on
> each.  With careful measuring etc, it can be done, but to be honest,
>
> I've never head an issue with twisted wires yet, but go for it if you
> want to.  It'd be nice to see it working!
>
> Chris
>
> Modena wrote:
> > Has anyone built/used/found some kind of circular electrical contact
> > solution for turrets? The idea being that to get electrical
> > connectivity from the hull to the turret, and still be able to turn
> > 360 degrees all day long, I need to get electrical contacts through
> > some kind of circular connection.
>
> > This is rather than using wires which will get twisted by turret
> > rotation. I realise that most of the time turrets are never going to
> > get rotated enough to worry to much about twisted wires, but it would
> > be nice not to have to worry about it at all and just be able to turn
> > around and around without hinderance.
>
> > I don't think I explained that very well, but hopefully it makes
> > sense :)
>
>


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[TANKS] Re: Turret traversing - circular electrical contacts

2009-02-02 Thread Xirus

The best and cheapest answer is, scale model railroad tracks. Hobby
stores sell flex rail in lengths of 3 feet and they are very flexible,
Even more so when you take the rails off the plastic.

You can use one rail as your common ground like on a car and for every
device you want to power you would need a separate rail to carry the
current through.

If you own a rotozip/dremel/router you can make notches in your turret
ring to seat these in to. On the turret side all you would need to
make is small springy contacts that touch the rail as soon as the
turret is on. You could make these out of thin sheet copper that hobby
stores sell.

If you dont want to do this then you can make round notches around the
turret ring and use a copper wire like the type that ground a house.
wont be as neat looking but if you do a good job it should work.

I will be doing this with my King Tiger.

Here is an example of what flex rail looks like.

http://www.dallasmodelworks.com/products/atlas/accessories/150-500.gif



On Feb 2, 12:22 pm, wsmon...@aim.com wrote:
>  Just let the wires twist. How many times are you going rotate in the same 
> direction. The wires going too the turret are small gauge and can be twisted 
> many time with no problems.
>
> Will Montgomery
>
> -Original Message-
> From: Chris Malton 
> To: rctankcombat@googlegroups.com
> Sent: Mon, 2 Feb 2009 3:52 am
> Subject: [TANKS] Re: Turret traversing - circular electrical contacts
>
> It makes perfect sense to me.
>
> I know exactly what you want to do, it's just a question of how.  I
> think what you'd need is a circle of metal all the way around for each
> connection you want to make, and then some kind of electrically
> connected wheel that rides on these.  You'd actually want 3 wheels on
> each.  With careful measuring etc, it can be done, but to be honest,
>
> I've never head an issue with twisted wires yet, but go for it if you
> want to.  It'd be nice to see it working!
>
> Chris
>
> Modena wrote:
> > Has anyone built/used/found some kind of circular electrical contact
> > solution for turrets? The idea being that to get electrical
> > connectivity from the hull to the turret, and still be able to turn
> > 360 degrees all day long, I need to get electrical contacts through
> > some kind of circular connection.
>
> > This is rather than using wires which will get twisted by turret
> > rotation. I realise that most of the time turrets are never going to
> > get rotated enough to worry to much about twisted wires, but it would
> > be nice not to have to worry about it at all and just be able to turn
> > around and around without hinderance.
>
> > I don't think I explained that very well, but hopefully it makes
> > sense :)
>
>
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[TANKS] Re: Turret traversing - circular electrical contacts

2009-02-02 Thread wsmontg5

 


 Just let the wires twist. How many times are you going rotate in the same 
direction. The wires going too the turret are small gauge and can be twisted 
many time with no problems.

Will Montgomery


 

-Original Message-
From: Chris Malton 
To: rctankcombat@googlegroups.com
Sent: Mon, 2 Feb 2009 3:52 am
Subject: [TANKS] Re: Turret traversing - circular electrical contacts











It makes perfect sense to me.

I know exactly what you want to do, it's just a question of how.  I 
think what you'd need is a circle of metal all the way around for each 
connection you want to make, and then some kind of electrically 
connected wheel that rides on these.  You'd actually want 3 wheels on 
each.  With careful measuring etc, it can be done, but to be honest,

I've never head an issue with twisted wires yet, but go for it if you 
want to.  It'd be nice to see it working!

Chris

Modena wrote:
> Has anyone built/used/found some kind of circular electrical contact
> solution for turrets? The idea being that to get electrical
> connectivity from the hull to the turret, and still be able to turn
> 360 degrees all day long, I need to get electrical contacts through
> some kind of circular connection.
> 
> This is rather than using wires which will get twisted by turret
> rotation. I realise that most of the time turrets are never going to
> get rotated enough to worry to much about twisted wires, but it would
> be nice not to have to worry about it at all and just be able to turn
> around and around without hinderance.
> 
> I don't think I explained that very well, but hopefully it makes
> sense :)
> 
> 
> > 







 


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[TANKS] Re: Tank Expo 2009

2009-02-02 Thread Peter Arundel

Bh . . . . . . . . !> Date: Mon, 2 
Feb 2009 11:39:35 -0800> Subject: [TANKS] Re: Tank Expo 2009> From: 
marcmetho...@zonnet.nl> To: rctankcombat@googlegroups.com> > > > I was a bit 
afraid when someone started to undress but at one point> but that was just one 
incident.> Luckily the rest kept their clothes on.> > > I look forward to 
seeing the sheep trebuchet in action.> > We'll work that out. Where would you 
get 1/6 scale sheep?> Is that lamb size? And how about just dipping them in 
paint before> launching?> > Marc> > > 
_

Hotmail, Messenger, Photos  and more - all with the new Windows Live. Get 
started! 
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[TANKS] Re: Tank Expo 2009

2009-02-02 Thread Marc


I was a bit afraid when someone started to undress but at one point
but that was just one incident.
Luckily the rest kept their clothes on.

> I look forward to seeing the sheep trebuchet in action.

We'll work that out. Where would you get 1/6 scale sheep?
Is that lamb size? And how about just dipping them in paint before
launching?

Marc


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[TANKS] no more servo savers (DTXC2582)

2009-02-02 Thread OdysseySlipways
i was just about to place an order at Tower Hobbies for another servo and  
servo saver and they no longer carry the saver. i did a quick search on ebay 
for 
 them DTXC2582 and found 2 new ones, so i grabbed them both.
 
so just in case you go to look for them
 
Chris,
_Odyssey  Slipways_ (http://hometown.aol.com/odysseyslipways/index.html) 
**Great Deals on Dell Laptops. Starting at $499. 
(http://pr.atwola.com/promoclk/10075x1217883258x1201191827/aol?redir=http://www.dell.com/co
ntent/products/features.aspx/laptops_great_deals?c=us%26cs=19%26l=en%26s=d
hs%26~ck=anavml)

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[TANKS] Re: Work has progressed further

2009-02-02 Thread Phil

Nice looking tank! In ally it shouldn't be too heavy either.

I saw Tiger 131 a couple of years ago and took some photos:

http://i236.photobucket.com/albums/ff13/sasquevaneach/TigerIMar06.jpg

http://s236.photobucket.com/albums/ff13/sasquevaneach/?action=view¤t=TigerHetzer-1.flv

You have to model a couple of dents in the mantle bottom/upper hull.
That's were a tank shell got stuck and jammed the turret, causing the
crew to evacute and the tank to be captured

Phil

On Feb 2, 2:26 am, Modena  wrote:
> I got the springs from the local hardware here in Oz, but they are
> made in the good'ol U.S. of A, bywww.centuryspring.com
>
> I chose part number C830 , full weight testing needs to be done to
> determine if I was right on the choice of spring.
>
> On Feb 2, 1:12 pm, Xirus  wrote:
>
>
>
> > Excellent work. Great to see all of these tigers being built. Keep up
> > the good work. Also, I would like to know where you got those
> > compression springs from for your suspension, how much was each one
> > and what is it able to handle.
>
> > On Jan 31, 11:38 pm, Modena  wrote:
>
> > > I finally got around to hacking up a website to detail the
> > > construction of my Tiger, that which has become known as "Plan B"
>
> > > The rear axle/track tensioner is done, and front glacis plate is
> > > coming together. I'm waiting for a shipment from Surplus Center which
> > > should give me everything I need to get the front drive system mounted
> > > and operational.
>
> > > details here athttp://www.holnet.net-Hide quoted text -
>
> > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -
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[TANKS] Re: Tank Expo 2009

2009-02-02 Thread Phil

I am pleased to report that the Tank Expo duly took place with a
number attending in person and 4 (Chris and myself from England; Marc
from The Netherlands; and Mike from South Korea) via skype and the
internet. Donuts were consumed and tanks in various states of undress
examined. Someone produced a rc Wall-E model. I popped out to the loo,
and when I returned Wall-E was (a) in bits and (b) non-operational. No-
one was surprised.

Thanks to all and particularly to Frank for keeping us foreigners
connected.

I look forward to seeing the sheep trebuchet in action.

Phil


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[TANKS] Re: Tank Expo 2009 - Tech Roundup

2009-02-02 Thread Frank Pittelli

odysseyslipw...@aol.com wrote:
> roto-molded ABS? ABS comes in liquid form or should that have been 
> vac-formed? just curious

Roto-molded ABS is correct.  Yes, ABS comes in liquid form, as do most 
plastics.

Frank P.


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[TANKS] Re: Turret traversing - circular electrical contacts

2009-02-02 Thread Andy Schwartz

We have explored this idea several times for our R2D2 robots.  About once a 
year someone does a group buy of Slip rings which brings the price down to 
about $50 for a 24 wire slip ring.  A low cost alternative is to use the 
connectors for  a headphone jack.


Andy
- Original Message - 
From: "HV" 
To: "R/C Tank Combat" 
Sent: Monday, February 02, 2009 7:54 AM
Subject: [TANKS] Re: Turret traversing - circular electrical contacts


>
> Yes it is called a slip ring, and they are expensive.
> > 


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[TANKS] Re: Turret traversing - circular electrical contacts

2009-02-02 Thread Sam D'Haene

I think the easiest way to do it is a second receiver and a second battery 
in the turret,,,

Sam,

--
From: "Modena" 
Sent: Monday, February 02, 2009 9:04 AM
To: "R/C Tank Combat" 
Subject: [TANKS] Turret traversing - circular electrical contacts

>
> Has anyone built/used/found some kind of circular electrical contact
> solution for turrets? The idea being that to get electrical
> connectivity from the hull to the turret, and still be able to turn
> 360 degrees all day long, I need to get electrical contacts through
> some kind of circular connection.
>
> This is rather than using wires which will get twisted by turret
> rotation. I realise that most of the time turrets are never going to
> get rotated enough to worry to much about twisted wires, but it would
> be nice not to have to worry about it at all and just be able to turn
> around and around without hinderance.
>
> I don't think I explained that very well, but hopefully it makes
> sense :)
>
>
> >
> 

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[TANKS] Re: Turret traversing - circular electrical contacts

2009-02-02 Thread HV

Yes it is called a slip ring, and they are expensive.
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[TANKS] Re: Turret traversing - circular electrical contacts

2009-02-02 Thread Thomas Lum
What you are describing is a slip ring (I think).  I think if you  
search for it in the forum, there was some discussion of it before.   
They can be very expensive but a low cost alternative was suggested.   
I think there was a mention of a telephone handset cord swivel (back  
when a phone had a cord!)
Tom

On Feb 2, 2009, at 6:59 AM, Mike Mangus wrote:

> The closest thing I've seen to what you are describing is an older  
> automotive horn button part.  Under the stearing wheels, there is a  
> disc with a couple circular tracks of copper that contacts ride on  
> to allow the steering wheel to spin freely without twisting horn  
> wires.  It would work I think.
>
> Mike M
>
> From: Modena 
> To: R/C Tank Combat 
> Sent: Monday, February 2, 2009 5:04:50 PM
> Subject: [TANKS] Turret traversing - circular electrical contacts
>
>
> Has anyone built/used/found some kind of circular electrical contact
> solution for turrets? The idea being that to get electrical
> connectivity from the hull to the turret, and still be able to turn
> 360 degrees all day long, I need to get electrical contacts through
> some kind of circular connection.
>
> This is rather than using wires which will get twisted by turret
> rotation. I realise that most of the time turrets are never going to
> get rotated enough to worry to much about twisted wires, but it would
> be nice not to have to worry about it at all and just be able to turn
> around and around without hinderance.
>
> I don't think I explained that very well, but hopefully it makes
> sense :)
>
>
>
> >


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[TANKS] Re: Turret traversing - circular electrical contacts

2009-02-02 Thread Mike Mangus
The closest thing I've seen to what you are describing is an older automotive 
horn button part.  Under the stearing wheels, there is a disc with a couple 
circular tracks of copper that contacts ride on to allow the steering wheel to 
spin freely without twisting horn wires.  It would work I think.

Mike M





From: Modena 
To: R/C Tank Combat 
Sent: Monday, February 2, 2009 5:04:50 PM
Subject: [TANKS] Turret traversing - circular electrical contacts


Has anyone built/used/found some kind of circular electrical contact
solution for turrets? The idea being that to get electrical
connectivity from the hull to the turret, and still be able to turn
360 degrees all day long, I need to get electrical contacts through
some kind of circular connection.

This is rather than using wires which will get twisted by turret
rotation. I realise that most of the time turrets are never going to
get rotated enough to worry to much about twisted wires, but it would
be nice not to have to worry about it at all and just be able to turn
around and around without hinderance.

I don't think I explained that very well, but hopefully it makes
sense :)




  
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[TANKS] Re: Turret traversing - circular electrical contacts

2009-02-02 Thread Michael Clark
 I'd found an electrical swivel that I thought would work, but it was
ultimately too expensive.

On Mon, Feb 2, 2009 at 3:52 AM, Chris Malton  wrote:

>
> It makes perfect sense to me.
>
> I know exactly what you want to do, it's just a question of how.  I
> think what you'd need is a circle of metal all the way around for each
> connection you want to make, and then some kind of electrically
> connected wheel that rides on these.  You'd actually want 3 wheels on
> each.  With careful measuring etc, it can be done, but to be honest,
>
> I've never head an issue with twisted wires yet, but go for it if you
> want to.  It'd be nice to see it working!
>
> Chris
>
> Modena wrote:
> > Has anyone built/used/found some kind of circular electrical contact
> > solution for turrets? The idea being that to get electrical
> > connectivity from the hull to the turret, and still be able to turn
> > 360 degrees all day long, I need to get electrical contacts through
> > some kind of circular connection.
> >
> > This is rather than using wires which will get twisted by turret
> > rotation. I realise that most of the time turrets are never going to
> > get rotated enough to worry to much about twisted wires, but it would
> > be nice not to have to worry about it at all and just be able to turn
> > around and around without hinderance.
> >
> > I don't think I explained that very well, but hopefully it makes
> > sense :)
> >
> >
> > >
>
>
>
> >
>

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[TANKS] Re: Turret traversing - circular electrical contacts

2009-02-02 Thread Chris Malton

It makes perfect sense to me.

I know exactly what you want to do, it's just a question of how.  I 
think what you'd need is a circle of metal all the way around for each 
connection you want to make, and then some kind of electrically 
connected wheel that rides on these.  You'd actually want 3 wheels on 
each.  With careful measuring etc, it can be done, but to be honest,

I've never head an issue with twisted wires yet, but go for it if you 
want to.  It'd be nice to see it working!

Chris

Modena wrote:
> Has anyone built/used/found some kind of circular electrical contact
> solution for turrets? The idea being that to get electrical
> connectivity from the hull to the turret, and still be able to turn
> 360 degrees all day long, I need to get electrical contacts through
> some kind of circular connection.
> 
> This is rather than using wires which will get twisted by turret
> rotation. I realise that most of the time turrets are never going to
> get rotated enough to worry to much about twisted wires, but it would
> be nice not to have to worry about it at all and just be able to turn
> around and around without hinderance.
> 
> I don't think I explained that very well, but hopefully it makes
> sense :)
> 
> 
> > 



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[TANKS] Turret traversing - circular electrical contacts

2009-02-02 Thread Modena

Has anyone built/used/found some kind of circular electrical contact
solution for turrets? The idea being that to get electrical
connectivity from the hull to the turret, and still be able to turn
360 degrees all day long, I need to get electrical contacts through
some kind of circular connection.

This is rather than using wires which will get twisted by turret
rotation. I realise that most of the time turrets are never going to
get rotated enough to worry to much about twisted wires, but it would
be nice not to have to worry about it at all and just be able to turn
around and around without hinderance.

I don't think I explained that very well, but hopefully it makes
sense :)


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