> -----Original Message-----
> From: Pete Smith [mailto:n4zr@contesting.com]
> Sent: Wednesday, December 04, 2002 13:04
> To: k1ttt@arrl.net
> Subject: Re: [Towertalk] (no subject)
>
> At 06:50 AM 12/4/02 -0500, you wrote:
> >they are worm gear. there are 2 wires for motor drive, 3 for
indicator,
> >and in the larger ones (2700/2800) the 6th line is a switch that
detects
> >getting close to the limits and signals the control box to slow down
the
> >motor before it hits the stops.
>
> Dave, I don't believe this is right, at least for the G-800 and G-1000
> models. The gear train in them looks like one of the classic
> big-gear/little-gear reduction gearboxes, and there is a separate
> brake. Fortunately, I haven't yet had to open them up, so this is
based
> on
> the parts drawing for the G-1000, but I'm pretty sure it's correct,
> because
> the motor is in line with the axis of rotation, not at 90 degrees.
>
> In my G-1000SDX, the connectors are 6-pin, but only 5 are used.
>
thanks to pete for pointing this out, there is no electrical brake in
the Yaesu rotors, but there is some kind of a mechanical spring and cam
arrangement on the motor end of the drive train that is called a brake.
And they are not worm gears just a big reduction ratio to a plain pinion
gear.
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://www.k1ttt.net
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