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Old 08-07-2012, 11:58 AM
gary
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Join Date: Apr 2005
Location: Mt. Kuring-Gai
Posts: 5,914
Argo Navis FIX ALT REF AUTO ADJUST ON

Quote:
Originally Posted by stephenb View Post
Between some of the typical Melbourne weather lately, I've been trying out my new Argo Navis on my 10" BinTel Dob. It literally took less that 40 minutes to install and 10 minutes to setup! Out of 4 x 30 minute sessions the pointing accuracy has been 90-95% successful. I've been able to locate many DSOs within the bounds of my light pollution. Occasionally the object will fall just outside the FOV with a TV 27mm Pan.

I built my own stalk and placed it on the far-side of the rocker box which was more ergonomic than on the 'near side'.

I'm extremely impressed with it's operation and simplicity and most of all the outstanding service and advice I've received from Gary (but with an AN, that's a given).

Edit: Gary, sorry for the lack of email. I've fixed my extension cable dilemma and I'll post some pics today to describe how I achieved it.

Stephen
Hi Stephen,

Thanks for the post and great to hear you are up and going.

To improve your pointing performance, we recommend you begin to use
a feature called AUTO ADJUST ON when you perform the FIX ALT REF step,
if you have not begun to use it already.

To set it up, DIAL up MODE SETUP, SETUP ALT REF and
enter a value of +090.000. Then when you perform the FIX ALT REF
STEP, DIAL up ALT REF=+090.000 AUTO ADJUST ON. Perform your two star
alignment as normal. The WARP factor should then be 0.00 (A) where
the (A) indicates the ALT REF point was automatically adjusted. If
you see a non-zero WARP factor when AUTO ADJUST is ON or an (X)
instead of an (A), it means something is amiss, such as a
misidentified star or cable not plugged in. Keep in mind that though
a WARP factor of 0.00 is a prerequisite for good pointing
performance, it does not necessarily guarantee good performance. The
reason is that the AUTO ADJUST mechanism bends over backwards to
correct the ALT REF point so as to produce a WARP factor of zero
wherever possible, even if you have misidentified the alignment stars.

Beyond AUTO ADJUST ON, Argo Navis has a powerful feature called the
Telescope Pointing Analysis System (TPAS) which is described in the Manual
under the section SETUP MNT ERRORS. However, before reaching for TPAS,
which is an advanced feature, you might find AUTO ADJUST ON is all you need.

Thanks again for the post and we appreciate your support.

Best Regards

Gary Kopff
Managing Director
Wildcard Innovations Pty. Ltd.
20 Kilmory Place, Mount Kuring-Gai
NSW. 2080. Australia
Phone +61-2-9457-9049
Fax +61-2-9457-9593
sales@wildcard-innovations.com.au
http://www.wildcard-innovations.com.au
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