The limits are in the software. It won't let you go past +/-90° (depending
on N/S hemisphere) so that the scope wopn't go over backwards and shear of
the finder. But this is as read on the keypad, not the setting circle. The
computer assumes that you powered up at 0°.
If this is a 12", it also won't let it go so low that the tube hits the
base. That's about -/+ 50°. Since it assumes you powered up at 0°, if you
instead start with the scope aimed up between the forks, it won't let you
slew more than about 50° down from there.
-John


>
>John you said..."There are no limit sensor in the fork arms or dec hub.
>The
>only limit is
>that it won't let you move it with the keypad past 90° dec (according to
>the
>keypad) or (on the 12") low enough (according to the keypad) to hit the
>base.
>
>-John"
>============================================================================
>=====
>That is probably true, however it seems to me that there must be some sort
>of limiting taking place; the exact nature of which is obscure; to me at
>least.
>
>If I start out with the scope set at 0hours and -90 deg and try to slew to
>antares without going through the polar align setup, the dec drive stops at
>something like -40deg. The key pad will not drive any further north. If I
>want to start off with the 'co-ordinates matched' method at Antares I have
>to manually put the tube in around that position then power her up. Just
>where the scope thinks it is at on power up I don't know. Maybe it thinks
>it is at zero deg or something. That would make sense if in alt mode but
>my
>keypad shows Polar align checked as soon as that menu option is displayed.
>Since it should reasonably expect to start out at +/-90deg with a polar
>alignment (even though I skip that part), I don't see why it will only slew
>about 50deg for me. Yep I have the correct time and location set and yes I
>have the n-s switch set to s. That is why I thought Mr. Meade installed
>some sort of sly limit sensor in there someplace, or more correctly a
>sensor which inputs to firmware and allows control limits to be set for the
>dec travel.
>
>
>

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