In message <484665CF.15753.BF0C2BF3@localhost>, Bernd Brinkmann
<bernd.brinkmann@...> writes

>

Hi Pete,

A long time ago, I asked Bill the same question.. luckily I kept his
reply.

Hope this helps.

Alan

Alan,  about having some sort of "horizon" limit for telescope
control:  as admittedly happens too frequently in Guide,  there is
a way to do this,  but it is not at all obvious.  You can edit
HORIZON.DAT and add lines resembling the following:

f 18 48 0 0 ; altitude cap
   0 67
  20 67
  40 67
  60 67
  80 67
100 67
120 67
140 67
160 67
180 67
200 67
220 67
240 67
260 67
280 67
300 67
320 67
340 67

    The above would cause Guide to draw an eighteen-point polygon
that loops around the zenith,  at altitude 67 degrees (obviously,
this can be readily changed) in a "danger! alert!"-suggestive red.

    Not the sort of solution that leaps out at you,  I realize!

> > Question 1. Is there any way to draw a 18° radius circle around
> the
> > NCP to simplify where I can't slew without crashing the scope.
> Yes,
> > I've set the declination limit to 72°, and the scope won't go
> there.
> > But Meade's software crashes if the "don't go there" limit is
> crossed
> > and I have to reboot and realign - a real pain. It would be
> really
> > nice to be able to draw a red circle indicating the limits beyond
> > which I'll crash.
>
>
>

Alan Cahill (J94)
Abbeydale Observatory,
Gloucester.
UK
http://mountabbeydale.pwp.blueyonder.co.uk