[amsat-bb] AlphaSpid Green Heron rotor controller PstRotator

[Burns Fisher]

Glad to hear GH was helpful and that you found a solution.  Luckily, my
G5500 is not close to anyone, so I'm the only one that hears it if I happen
to be outside :-)  We certainly need to pay attention to our neighbor's
sensitivities, especially now the we are all home more!

Thanks for the update!

On Fri, Mar 27, 2020 at 3:18 PM Jeff <kb2mjeff at att.net> wrote:

> I contacted Jeff at Green Heron Engineering this morning.  He suggested I
> set the Min Speed of both the AZ and EL in the motor control to 10. This
> stopped the buzzing noise(that only I can't hear). I then had my Wife take
> position under the antenna system as I adjusted the Min Speed slider to get
> it as low as possible. It was set to a 3 on both when I started and now I'm
> at a 8 AZ, and a  full scale 10 on EL. This fixed the noise problem, but
> now the rotor doesn't point as precisely as before, it will over shoot
> around 2  degrees or so. This is fine with my M2  Leo pack. Thanks Kevin.
> And Burns, you just reminded me how much nosier the 5500 is, much louder
> the AlphaSpid. All is once again well in KB2M land 😊
>
>
>
> 73 Jeff kb2m
>
>
>
> -----Original Message-----
> From: AMSAT-BB <amsat-bb-bounces at amsat.org> On Behalf Of Burns Fisher via
> AMSAT-BB
> Sent: Friday, March 27, 2020 15:04
> To: Kevin <wa7fwf at gmail.com>
> Cc: AMSAT BB <amsat-bb at amsat.org>
> Subject: Re: [amsat-bb] AlphaSpid Green Heron rotor controller PstRotator
>
>
>
> Is the Alfa-Spid stepper motor based?  Certainly the feedback is digital.
>
> But I could certainly imagine a bunch of fast steps sounds like a beep.
>
>
>
> My G5500 actually makes a slightly odd noise too. I sounds almost like a
> clock being wound.  I'm guessing it has something to do with the brake??
>
> Does the A-S have one?
>
>
>
> Maybe sound insulation is going to be your best bet.
>
>
>
> On Thu, Mar 26, 2020 at 9:10 PM Kevin via AMSAT-BB <amsat-bb at amsat.org>
>
> wrote:
>
>
>
> > I do not own one but looking at the documentation for the controller I
>
> > noticed this, "gradual startup and shutdown of rotor power to reduce
>
> > stress on towers, antennas and rotors. This is achieved by
>
> > pulse-width-modulating the operating voltage for the rotor."
>
> >
>
> > That could very well be the source of the "beeping"  with the windings
>
> > in the motor singing.
>
> >
>
> > 73
>
> > Kevin WA7FWF
>
> >
>
> > On 3/26/2020 17:47, Jeff via AMSAT-BB wrote:
>
> > > Green Heron R-21 controller
>
> >
>
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> _______________________________________________
>
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> expressed are solely those of the author, and do not reflect the official
> views of AMSAT-NA.
>
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