Oscillation is caused when the calibration is wrong, and it overcorrects.
-John


>
>From what I can tell, the guider seems to be functioning, it just
>oscillates
>around the guide point. The next thing I'll look into is focus. I thought I
>had a decent focus, but ...
>
>Blair
>
>
>----- Original Message -----
>Sent: Sunday, April 18, 2004 12:00 PM
>Subject: RE: [M]: More on my 201 XT problem
>
>
> > Do you have double lock-down screws for the guider? If not, I'd advise
> > to add another. Check any possible rotation and flexure points. It does
> > sound like the problem goes away when using SBIG guiders, so that would
> > seem to eliminate any common problems, but you never know. Sometimes,
> > it just takes a long time toi get all the kinks out of a system.
> >
> > Alan
> >
> > > I've lost track of the details of this thread, but here's a few
> > > "common
> > > problems" to check for:
> > > Make sure you do a dark frame when you start the night, and whenever
> > > you
> > > change the exposure time, or if you disconnect power from the guider.
> > > Recalibrate if you change the effective focal length (ie, add a focal
> > >
> > > reducer or anything like that), or if you change the orientation of
> > > the
> > > guider wrt RA/dec directions, or if you make a big change in
> > > declination.
> >
> >
> >
> >
> >
> >
> > __________________________________
> > Do you Yahoo!?
> > Yahoo! Photos: High-quality 4x6 digital prints for 25¢
> > http://photos.yahoo.com/ph/print_splash
> >
> >
>
>
>

_________________________________________________________________
Get rid of annoying pop-up ads with the new MSN Toolbar – FREE!
http://toolbar.msn.com/go/onm00200414ave/direct/01/

View index by [date] [author] [subject]
Previous message: [M]: Update to Topical Archive Available, Email address hidden
Next message: [M]: LX200 - flashing lights on hand paddle, Email address hidden
Next message in thread: Re: [M]: More on my 201 XT problem, John Mahony
Previous message in thread: Re: [M]: More on my 201 XT problem, Blair MacDonald