[chbot] Cheap Rack and pinion servos?

[Brahm Boelee]

That's good but I need a longer extension than 10cms and pardon my pickiness but it's a bit pricy. Multi-turn servos sound good but it's just finding the pinion on the drive shaft to match the teeth. 

Is this a multi-turn servo:
http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=22528&aff=757677

?

> Date: Tue, 21 Apr 2015 19:47:20 +1200
> From: hamster at snap.net.nz
> To: chchrobotics at lists.linuxnut.co.nz
> Subject: Re: [chbot] Cheap Rack and pinion servos?
> 
> https://nicegear.co.nz/robotics/stepper-motor-29-ozin-200-stepsrev-threaded-shaft/
> 
> 
> Maybe?
> 
>  Brahm Boelee <brahmboelee84 at hotmail.co.uk> wrote:
> 
> >I really want an extension of 40cm. 
> >
> >On 21/04/2015, at 7:33 pm, Mark Beckett <m.beckett at amuri.net> wrote:
> >> 
> >> Brahm might have been after one of these.
> >> https://www.google.co.nz/search?q=central+locking+actuator&tbm=isch&tbo=u&source=univ&sa=X&ei=Jf01VcbDH8jFmQXj7IHAAQ&ved=0CBwQsAQ&biw=1680&bih=913
> >> 
> >> 
> >> Andrew Errington wrote:
> >>> Does such a thing even exist?  You might have to make your own.  Maybe using a multi-turn servo such as a sail winder with a pinion on the driveshaft.
> >>> 
> >>> Presumably you are looking for linear motion.  Have you considered a threaded rod?
> >>> 
> >>> Best wishes,
> >>> 
> >>> Andrew
> >>> 
> >>> On 21 April 2015 at 16:17, Brahm Boelee <brahmboelee84 at hotmail.co.uk <mailto:brahmboelee84 at hotmail.co.uk>> wrote:
> >>> 
> >>>    Hi.
> >>>    Does anyone know where to get cheap rack and pinion servos?
> >>>    Preferably with a longer rack.
> >>>    Thanks for your help
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