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[catengineman]

Hi,     All,

 Now I know that there is some where on this site all the info I would need but as you out there may be aware I am an ENGINEER so therefor require help in any thing / every thing

I want to know what is the strongest pulling servo (not worried about speed) but this must be a standard size and have normal fixing points.

Now even more info required and that is I have a Futaba servo number S3003 it is almost strong enough once I have modified it to run 360 degree but not quite :( is there a servo out there ? the same size but like an Arnold Swartzenager ??

            PS: cheap as I'm gonna convert them so money is tight.


Richard,

[Shipmate60]

What is it for Richard.
You could use a servo to operate microswitches powering something like a highly geared 360 motor.
All the power you want then.

Bob

[catengineman]

Hi,    I'm starting to gather the parts for my next build and in the process of doing some testing and trials

The servo's are for dredge winches, the reason I want to keep to the servo size is that I have "made" the winch unit which will house the servo (deep sadness if I have to start again) and the winch drum will fit onto the servo spigot.

I've hammed up the dredge gear to look some thing like it will on the ship and filled it with water bu blocking up each end with corks from (mmmmm thats another story) the system will lift until the pipe work is at the waterline then the servo's stall.

Now I know that the water will drain in the ideal world but if the ship (model) is down by the head I could be in trouble recovering the gear and I would like to have that little edge on things if you know what I mean.

Richard,

Ok here is yet another  question for the more ingeniuos out there?
                                                How much damage will I cause by putting 8 volts through the servo system in recever?

Richard,

[HS93 (RIP)]

Lots ,  but some do have a built in BEC  , But thats not the way to go ,Ic cars years ago we would use 5 nicads 6v but that only the same as dry cells, go for a retract servo

Peter

[Shipmate60]

Richard,
Couldnt you fit geared motor under the deck and drive it from geared motor via a toothed belt?

Bob

[FullLeatherJacket]

10 Kg.cm do you?
http://www.jperkinsdistribution.co.uk/detail.php?JPNO=7720220&activepage=1&Navmain=R/C%20equipment&subcatname=Servos
Cheap, too. I have used one of these and it's fine.
BTW The same list includes a box of 50 standard-sized servos for less than £7 - that's not each, that's for the lot!
FLJ

[John W E]

Hi there

FLJ - just been on the above link and sadly, disappointed.  The Company (well its looks like it to me) dont sell direct to the public, think they just sell to shops or traders.   Nearly had meself a box of servos for about 7 quid - bummer.  :-\ greatly disappointed. 

aye
john e
bluebird

[roycv]

Hi catengineman, I am not sure of the very latest technology but the chips in servos do not like more than 6 volts 6.5 max.
Howes do a standard size servo with 5kgrms pull at 1 cm. for a fiver.
regards Roy

[tigertiger]

Hi Catengine man

http://www.futaba-rc.com/servos/servos.html


have a look here for specs and sizes. This is a US site but you can use it to select the Futaba servo you want then go shopping for it elsewhere.

The s3003 is a standard servo. with 56.9oz/in of torque. at 6v

Get a sail servo or Hi torque servo.
The s3305 with 123.4oz/in at 6v is one option.

I know you want to keep costs down. but there are other standard servos with a bit more oomph as well.

[catengineman]

Thanks chaps and err  :'(

7.5 volts through a rec and servo system is a big NO NO NO !

rec f##### servo not sure but smells funny now :'(

Still you only learn by your mishtakes

Richard,

[Shipmate60]

OOPS  :)

[catengineman]

OOPS  :)

You could say that :-[

Richard,

[Shipmate60]

But now we all KNOW what happens. 

Bob

[Telstar]

Hi Richard

Did you ever solve your servo hunt. Sorry about the killer  volts, Rx' are sensitive.
If the project is still active you could look at a Hi tech HS-77BB It is a low profile servo that will fit in place of most standard servos and has about 30% more torque 76.3 against Futaba 3003 56.9. They are usually readily available about £20. I use one as a sail winch in a small sailing boat.

cheers Tom

[catengineman]

Hi Telstar,

 On the subject of the servo strength I have sorted out some new units (well Westbourne's actually)
and now armed with a 6volt SLA battery I will be on course again?

The servos I have pull enough and I have been able to modify them to run 360 and at various speeds so all in all there is a big smile on my face again (for now) they are a bit tight in my winch's but with the trusty dremmel I can make them fit quite nicely.

So now that I can get my winches to work I can now start on the build.

AAAAArrrGH from scratch?

I've been in  about 20 D I Y stores and none of them sell this scratch stuff but one did say he had some toit
though it was not the round toit that I was after he thought that I may be able to use it?

Sorry about that,  just got carried away in the happiness of the moment

Richard,