[Logo] Argo Navis Users' Group
  [Search] Search   [Recent Topics] Recent Topics   [Hottest Topics] Hottest Topics   [Top Downloads] Top Downloads   [Groups] Back to home page 
[Register] Register /  [Login] Login 
Argo Navis Communication RSS feed
Forum Index » User Forum
Author Message
Scott Hayes

Joined: 18/11/2020
Messages: 1
Location: Legana, Tasmania
Just received my Argo Navis today. I'm now like a child in a lolly shop waiting to head home and put it all together. I need to also wait for my RN-240M adapter to arrive. Thank you for fast and efficient service Gary. It was a pleasure to deal with during the whole process.



Joined: 17/10/2019
Messages: 122
Location: Mount Kuring-Gai NSW Australia
Hi Scott,

Thanks for the post and welcome to the Group! Greetings to you there in Tasmania, one of our favourite parts of the world.

Just a reminder to set 20000 steps on the azimuth axis and leave the default of 10000 on the altitude axis.

As part of your setup, you will need to establish the encoder direction senses which are the +/- signs in SETUP ALT STEPS and SETUP AZ STEPS.

The following is a procedure that helps you establish what they should be. The advantage of this procedure is that you can even perform during the daytime indoors.

To check the SETUP ALT STEPS sign, point the Optical Tube Assembly (OTA)
to the vertical and DIAL up MODE FIX ALT REF, ALT REF=+90, AUTO ADJUST
OFF and then press ENTER. Now DIAL up MODE ENCODER. The right-hand
displayed value should be close to +90 degrees. Now push the OTA
downward in Altitude toward the horizon. The right-hand displayed value
should decrease, +89, +88, ... +3, +2, +1, 0 as you go from the zenith
toward the horizon. If not, reverse the SETUP ALT STEPS sign and repeat
the test.

To check the SETUP AZ STEPS sign, rotate the scope in Az clockwise
whilst observing the left-hand displayed value in MODE ENCODER.
The Az angle should increase. If it does not, reverse the SETUP AZ STEPS sign.

As mentioned in the User Manual, irrespective of which way the
arrows point in GUIDE mode, always push the scope in a direction
that makes the GUIDE angles closer to zero. One can later change the
convention of which way the arrows point using SETUP GUIDE as a
matter of personal preference for your particular installation.

Once you have correctly established the encoder direction senses,
we also recommend you use AUTO ADJUST ON when you perform the FIX
ALT REF step. 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

If you ever need assistance, please don't hesitate to email or to give us a call.

Gary Kopff
Managing Director
Wildcard Innovations Pty. Ltd.
20 Kilmory Place
Mount Kuring-Gai NSW 2080
Phone +61-2-9457-9049
[Email] [WWW]
Forum Index » User Forum
Go to:   
Mobile view
Powered by JForum 2.6.2 © 2019 JForum Team • Maintained by Andowson Chang and Ulf Dittmer