[Moon-net] Moon tracker for SPID ROTOR

[ve4ma]

I am sure there are many that do not have a problem.  KM0T and I use the
rotor for terrestrial service ( up to 24 GHz) and we experience regular
errors of 4-5 degrees..that we calibrate out and calibrate back in...looking
forward to an upgraded chip

Best 73
Barry VE4MA

-----Original Message-----
From: moon-net-bounces at list-serv.davidv.net
[mailto:moon-net-bounces at list-serv.davidv.net] On Behalf Of David Anderson
GM4JJJ
Sent: Monday, March 31, 2008 3:01 AM
To: F1TE
Cc: moon-net at list-serv.davidv.net
Subject: Re: [Moon-net] Moon tracker for SPID ROTOR

Lucien,

I'm impressed by your design and work, but I would like to say that we  
have many Spid rotators with controllers in the field that do not  
suffer from the bad precision you describe.



On 31 Mar 2008, at 08:51, F1TE wrote:
> Hello
> The motor  "SPID",  manufactured in Poland,  is a very good rotor  
> for EME
> antennas.
> But its controller has a bad precision, due to poor management of the
> incremental encoder pulses.
> Drift cumulative display occur and it is not uncommon to find after  
> a few
> times up to 20° of display error.
> What miss the moon, even on 6 metres!
> My tracker at the origin was planned for SPID for azimut and  jack  
> (sat
> actuator) for elevation, with correction of the linearity of  
> movement for
> the jack pulses encoder.
> I developed  a special firmware for the dual AZ / EL SPID rotor  
> giving full
> satiffaction, manual positioning or automatic tracking via RS232.
> Without cumulative drift display.
> http://www.f1te.org/Tracker/trackeur_gb.htm
>
> Another motor controllers for the single azimuth SPID rotor  is also
> described in french
>
> http://www.f1te.org/SPID/Controleur_SPID.htm
>
> 73, Lucien F1TE
>
>
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73
___________________________________________________________________________
David Anderson, GM4JJJ         E-mail: david at gm4jjj.co.uk
___________________________________________________________________________
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