That's the same for the M2 2800.
However, once you make that adjustment
to the controller you loose some rotation in
the direction of the slippage. You can't have
your cake and eat it too...
73, Ted K2QMF
On Wed, 1 Mar 2006 13:09:55 -0600 <ve4xt@mts.net> writes:
> This is all a very good argument for an Alfa-Spid style of
> controller: mast
> slips, adjust the controller. Period. No climbing. No pinning. No
> stripped
> gears.
>
> (At least until the slippage is, I think, 320 degrees, at which
> point you
> reach the upper limit of the box's ability to adjust.)
>
> The Spid uses pulses to tell the controller the antenna's moving, so
>
> there's no physical connection between the mast and any indicator
> rheostat.
>
>
>
>
> > From: "Al Williams" <alwilliams@olywa.net>
> > Date: 2006/03/01 Wed AM 11:53:28 CST
> > To: <towertalk@contesting.com>
> > Subject: Re: [TowerTalk] Rotor Stripping Gears?
> >
> > A cutaway drawing of the M2 2800 rotator shows five (5) regular
> type
> gears
> > between the mast clamp/mast and the worm drive!
> > I have noticed that there is a fair amount of movement of the
> boom
> caused
> > by the wind apparently acting on the backlash of the five gears.
> >
> > The M2 specification lists a braking torque of 17000 in-lbs while
> also
> > stating that "Precision wormdrive - cannot be reversed by mast
> torque;
> NO
> > BRAKE RQD. As mentioned by others M2 voids the warranty if the
> mast
> is
> > pinned to the rotator clamps.
> >
> > Question is, what does M2 really mean by their braking torque and
> how
> was it
> > determined? Also how does one determine the torque caused by the
>
> wind load
> > and inertial load of the antenna/mast assembly?
> >
> > Also note that there are two long elements on one side of the mast
> vs
> only
> > one long element on the other side..
> >
> > k7puc
> >
> > ----- Original Message -----
> > From: "peter.voelpel" <df3kv@t-online.de>
> >
> > I learned it twice that worm-gear drive rotators also loose their
> gears.
> > Two of my Prosistel PST2051 failed with a beam of 0,9m2 at 10m
> height
> and
> > only 60km/h wind gusts at that time.
> > The worm axle pushed the bearing completely out of the housing
> which
> > ruined....
> >
> > _______________________________________________
> >
> >
> >
> > _______________________________________________
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> > TowerTalk@contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> >
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>
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