Model Boat Mayhem

Please login or register.

Login with username, password and session length.
Pages: [1] 2   Go Down

Author Topic: Rotating turrets  (Read 11434 times)

spooksgone

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 355
  • Location: East Devon
Rotating turrets
« on: June 04, 2012, 02:09:11 pm »

Hi all. My next project is going to be a scale shipyard 1/48th Fletcher class destroyer. At nearly 8 feet long it will be crying out to have as many working functions as possible. Does any body know the best way to make the gun turrets rotate? I am starting to gather the parts for this build all ready.
Cheers all
 
Logged

TailUK

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,672
  • Location: East Midlands
Re: Rotating turrets
« Reply #1 on: June 04, 2012, 03:29:02 pm »

Modified servos? Although how you wire them is a mystery to me.
Logged
No human society has ever functioned without models to capture, explain,disseminate,
persuade, sell, reinforce and analyse all kinds of ideas, values, concepts and situations.

howyson

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 35
  • Location: Newcastle upon Tyne
Re: Rotating turrets
« Reply #2 on: June 04, 2012, 04:02:03 pm »

Logged

deadbeat

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 244
  • Location: Waterlooville
Re: Rotating turrets
« Reply #3 on: June 04, 2012, 04:14:31 pm »

Try this from Action Electronics.

http://www.action-electronics.co.uk/mixers.php

look at Servomorph

I haven't used it yet but may well do in the future sounds just right for the job!
Logged

john44

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,659
  • member of the Potteries Model boat club
Re: Rotating turrets
« Reply #4 on: June 04, 2012, 07:46:30 pm »

Hi deadbeat, you can use standard un - modernized servo,s or mini/micro servo,s . You just fit a pulley on the servo & a pulley  under the turret.
The pulley on the servo needs to be 5 times the size of the pulley on the turret to give the angular degrees needed. I  use this set up on my PT15 through a ACtion servo morph to slow the servo,s down, and both guns work of 1 servo-morph
via a Y lead.
If you mount your servo/pulley in between 2 gun,s to get them to turn the same way you will have to put a twist
on the rubber band to one of the guns.( like a figure 8 ).

hope this helps

john
Logged

spooksgone

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 355
  • Location: East Devon
Re: Rotating turrets
« Reply #5 on: June 05, 2012, 07:43:05 pm »

Just had a thought, I remember building the Nichiomo 1/200th scale Yamato, back in the early 80's the turrets where all contrlled by a simple motor and a cam type system. Failing that, back to a simple push rod system. wow, how time moves on.
Logged

Martin (Admin)

  • Administrator
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 23,359
  • Location: Peterborough, UK
    • Model Boat Mayhem
Re: Rotating turrets
« Reply #6 on: June 05, 2012, 08:02:31 pm »


Just make sure you use quality servos, bearings etc. as with age and wear, they will get all 'juddery' and look terrible when moving!
Smooth, smooth, smooth!
Logged
"This is my firm opinion, but what do I know?!" -  Visit the Mayhem FaceBook Groups!  &  Giant Models

spooksgone

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 355
  • Location: East Devon
Re: Rotating turrets
« Reply #7 on: June 06, 2012, 08:48:39 pm »

Thanks for all of the info guy's. lot's of food for thought.  It looks to me that the servomorth might be worth a look, thank's Deadbeat.
Thank you all
Phil
Logged

Harquebus

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 187
Re: Rotating turrets
« Reply #8 on: August 11, 2012, 04:22:13 pm »

Seems all the rotating turrets I have seen are servo controlled with linkages and pushrods and have to be operated with a slow thumb to replicate the slow, smooth and heavy turning seen on the real warship. Furthermore, the turrets return to "neutral" when the stick is released. Is there a way to have a turret rotate to a certain point and stop there?

Those RC tanks have that function and one can drive around with the turret "stuck" at a certain angle until one moves it again. Not sure what the servomorph does; perhaps I need to look in that direction(?).
Logged
~Harq

John W E

  • I see no ships !!
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 8,813
  • Location: South shields
Re: Rotating turrets
« Reply #9 on: August 11, 2012, 05:39:06 pm »

hi there

this may be of interest to some requiring rotating turrets and cranes etc.    I have just finished a kit which I bought from Technobots - its for a servo expander - its called a servo control unit.  It increases the standard servo movement to 180 degrees but also it has the option where you can move the servo to any position on the 180 degree arc and when you have reached the point you want the servo to finally be at; you then release your tx control stick to central position and the servo will stay at that fixed point which you left it at - until which time you move the tx stick back to that position - then the servo will move.

the only downside to this, as far as I am aware - Technobots only do this item as a kit as far as I can see and I would class it as a kit for the experienced Electronics person as it is built on strip board - there is no resistor colour coding write-up (you have to know your resister colour codes/which you can get from the web) and you have to do a lot of link wiring on the board as well as strip cutting.

The other thing is you have to pay extra for a case, which I didnt realise at the time - but - for £12 (without the case) not bad I s'pose.

I will put a link on shortly.

aye
john
Logged
Knowledge begins with respect
But fools hate wisdom and discipline

John W E

  • I see no ships !!
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 8,813
  • Location: South shields
Re: Rotating turrets
« Reply #10 on: August 11, 2012, 06:09:33 pm »

Logged
Knowledge begins with respect
But fools hate wisdom and discipline

ACTion

  • Guest
Re: Rotating turrets
« Reply #11 on: August 11, 2012, 07:38:05 pm »

http://www.action-electronics.co.uk/pdfs/P96.pdf
£14 built and tested..................oh, and  with a case.
Suit yourself.
DM
Logged

bikerdude999

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 514
  • Location: Corby, UK
Re: Rotating turrets
« Reply #12 on: August 12, 2012, 09:26:18 am »

Logged

dodgy geezer

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 3,948
  • Location: London
Re: Rotating turrets
« Reply #13 on: August 12, 2012, 12:21:50 pm »

AFAICS, what it does is change the standard proportional servo control into 'progressive' control.

Anyone here old enough to remember that?   :D :D
Logged

Circlip

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 4,447
  • Location: North of Watford, South of Hadrians wall
Re: Rotating turrets
« Reply #14 on: August 12, 2012, 12:23:46 pm »

 :-))   "Wesclox" alarm clock conversion.

  Regards  Ian
Logged
You might not like what I say, but that doesn't mean I'm wrong.
 
What I said is not what you  think you heard.

ACTion

  • Guest
Re: Rotating turrets
« Reply #15 on: August 12, 2012, 01:42:47 pm »

AFAICS, what it does is change the standard proportional servo control into 'progressive' control.

Anyone here old enough to remember that?   :D :D

Throttle and elevator trim servos with seven wires? Reed banks? Six-lever trannies? Centre-tapped DEAC packs? Oh yes, quite  old enough thanks.............unfortunately (and so are you, D-G  :P).
Dave M
Logged

john44

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,659
  • member of the Potteries Model boat club
Re: Rotating turrets
« Reply #16 on: August 12, 2012, 06:12:56 pm »

I havent got a clue what you are on about, a reed bank is on the sides of the lake isnt it?
as for the rest they could have found it on Mars.

just shows Im young or just late into RC. {-) {-)
Logged

ACTion

  • Guest
Re: Rotating turrets
« Reply #17 on: August 12, 2012, 06:55:25 pm »

just shows Im young or just late into RC. {-) {-)
Or both! Never mind. If you really  want to know about that sort of stuff I'm sure there's plenty on t'interweb about it. "You young buggers don't know you're born......"
DM
Logged

dodgy geezer

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 3,948
  • Location: London
Re: Rotating turrets
« Reply #18 on: August 12, 2012, 07:40:03 pm »

One of my servos...   :-)) :-))



Logged

john44

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,659
  • member of the Potteries Model boat club
Re: Rotating turrets
« Reply #19 on: August 12, 2012, 07:54:23 pm »

One of my servos...   Thumbs up Thumbs up

1 of your servo,s :o how big is the boat? {-) {-)

john
Logged

ACTion

  • Guest
Re: Rotating turrets
« Reply #20 on: August 12, 2012, 08:25:48 pm »

Blimey - a Mighty Midget! I made a Galloping Ghost servo from one of those - worked a damned sight better with our Fleet GG set than the fancy Rand LR3 and cost about a fifth as much.

(Note to Forum Ring Wraiths/Nazgul/Death Eaters/Moderators:

Sorry to go off topic but it does seem to have run its course. You'll forgive a couple of old f^rts from reminiscing, surely? If not, Duramites to the lot of you!)

Dave M
Logged

Tug-Kenny RIP

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 7,625
  • Location: Newport. S Wales
Re: Rotating turrets
« Reply #21 on: August 12, 2012, 08:35:45 pm »


Love it.   All interesting stuff.



ken
Logged
Despite the high cost of living   .......... It remains popular

dodgy geezer

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 3,948
  • Location: London
Re: Rotating turrets
« Reply #22 on: August 13, 2012, 08:22:43 am »


1 of your servo,s :o how big is the boat? {-) {-)




Sea Rover at 30" - old-fashioned radio installations used to fill a boat from stem to stern, usually with multiple batteries and mechanical contrivances...
Logged

spooksgone

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 355
  • Location: East Devon
Re: Rotating turrets
« Reply #23 on: September 20, 2013, 10:31:06 am »

Well I finally got around to buying a servo morph from the components shop, Installed it in my v+w [rear turret] and it works a treat. Certainley will be getting some more for my next project.
Thanks guy's
Phil
Logged

Geoff

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,177
Re: Rotating turrets
« Reply #24 on: September 20, 2013, 01:36:49 pm »

Quick question though, does it actuially allow 180 degrees rotation or a little less? The info seems a little contradictory, so really the question is for someone who has actually purchased it.
 
Also is the movement smooth or a little jerky?
 
Looks really interesting and easier than my method. (see Warships underway "how too page")
 
Cheers
 
Geoff
Logged
Pages: [1] 2   Go Up
 

Page created in 0.119 seconds with 22 queries.