Re: "Rubber Banding" after slew to the East

Yves Laroche

Hi all,

Please not that the default RA backlash setting for the ASCOM driver is
00:00:15. This is equal to 15 seconds of time NOT 15 arcsec. 15 arcsec
multiplied by 15 seconds equals 225 arcsec. At the time Ajai Sehgal was
writting the code, there was an error in the AP command protocol manual
about the default RA backlash setting. The default must be set to 00:00:00




De : [] De la part de
Dean S
Envoyé : 9 mars 2009 22:16
À :
Objet : Re: [ap-gto] Re: "Rubber Banding" after slew to the East

Hi Mike,

I always leave the backlash at 0. However the only thing I did find was
that ascom had a very low number in the RA setting so I set it to 0. But I
doubt I even had the sky connected at that point so not sure if it caused it

or not. It worked fine the next evening but I will keep an eye on it.


----- Original Message -----
From: "Mike Dodd" < <> >
To: <ap-gto@yahoogroups. <> com>
Sent: Monday, March 09, 2009 9:13 PM
Subject: [ap-gto] Re: "Rubber Banding" after slew to the East

I noticed this last night for the first time on my 1200. I was centering
my alignment star at a speed of 600, and it would return a bit after I
released the east button.
Do you have a value set in Mount Movement --> RA Backlash? The behavior
you describe sounds to me like over-compensated RA backlash.


Mike Dodd
Montpelier, VA USA
http://astronomy. <>


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