Ah!!
Ignore my offset request as the pennies just dropped, bit slow albeit!!

Cheers.

Jeff.




--- In lx90@yahoogroups.com, "stargazerlx90" <stargazerlx90@...> wrote:
>
> Hi Fernando,
> Thanks for your response.
> But i thought the weight of the scope on any wedge will be the same no matter
how long the gap is between the centres of a wedge, and providing enough
reinforcement is made to fully compensate for the slightly extra length of the
wedge i really can't see it being a problem?
> This will mean the pier remains dead centre of the observatory with no offset
needed just in case i should have any clearance problems if I'm correct.
>
> Jeff.
>
>
>
> --- In lx90@yahoogroups.com, Fernando Campuzano <fcampuzano25@> wrote:
> >
> > Hi Jeff.
> > Just a doubt. Why do you want the centre of the DEC axis being alligned with
the centre of the pier?. Shouldn't be the ideal situation with the gravity
centre of the whole setup (scope and wedge) being alligned with the pier? The
centre of the DEC axis will be just the centre for the balance of the OTA with
all of its accesories (cameras, guide tube, counterweights,etc). The extra
weight from the fork arms, wedge and the base of the scope would be tensioning
the attachments bolts of the wedge to the pier, and maybe introducing some pier
flexure..?
> > Fernando
> >
> >  
> >
> >
> >
> > ________________________________
> > De: stargazerlx90 <stargazerlx90@>
> > Para: lx90@yahoogroups.com
> > Enviado: sábado, 11 de julio, 2009 10:30:13
> > Asunto: [lx90] Re: Pier offset
> >
> >
> >
> >
> >
> > Hi,
> > Just wondering if anyone can help with this info i need as i don't have my
scope with me at the moment.
> > What I'm actually looking for is a distance between the centre of the
pier/wedge mounting bolt to the centre of the DEC axis when the angle is set to
a Latitude of 37.3, the idea is that the Dec axis automatically centres over the
pier centre when set at this Lat.
> >
> > If i then construct a wedge with these measurements it will mean i don't
need to have a pier offset i think, am i correct with this assumption please any
takers?
> >
> > Thanks all.
> >
> > Jeff.
> >
> > --- In lx90@yahoogroups. com, "stargazerlx90" <stargazerlx90@ ...> wrote:
> > >
> > > Sorry that should read "so the 'pier' is still centred in the observatory"
.
> > >
> > > Jeff.
> > >
> > >
> > >
> > >
> > > --- In lx90@yahoogroups. com, "stargazerlx90" <stargazerlx90@ > wrote:
> > > >
> > > > Would someone be able to work out what the pier offset is for a Lat of
37.352?
> > > > I want to costruct a wedge for a 12" lx90 but make the offset distance
correspond to the centre of the mounting bolt so the scope is still centred in
the observatory. Does this make sense?
> > > > I think it was 13 3/4" at that lat from memory but could be way out!!
> > > >
> > > > Many thanks.
> > > >
> > > > Clear skies.
> > > >
> > > > Jeff.
> > > >
> > >
> >
> >
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>