This description is accurate for the dec, especially on the classic, which
had notoriously sloppy gearboxes. But the RA seems to use the same method
used on fork mounted SCTs all the way back to the orange tube C-8. The RA
knob does not connect to the gears used for driving the scope. So it's a
different method, but yes, there's usually some slop in it. On some SCTs,
there's a simple (but undocumented) adjustment for the gear mesh on the RA
slow-mo knob. My old LX10 is adjustable, but I don't know if the LX200
(classic or GPS) is, because there's not much need for the slow-mo knob on a
scope with motorized slewing, so I've never checked. At any rate, it's not
that important. As long as the scope itself doesn't move when the clutch is
locked, you're OK. And any slop in the _scope_ with the clutch locked is
not related to the RA knob.
-John


>
>----- Original Message -----
>
> > When the DEC and RA locks are engaged, it it normal to have play in the
>DEC
> > and RA slow-motion controls?
> > http://www.nauticom.net
>Yes.
>This is the backlash in the gearbox between the motor, and the worm. The
>'slow motion' knobs connect quite close to the motor, and with several
>gears
>between them and the worm itself. Any play in the latter gears especially,
>is magnified by the gearing between. Typical backlash figures, correspond
>to
>perhaps three or four degrees of play at this point.
>
>Best Wishes

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