Cliff Hipsher ICC USN (Ret.) '03 883 XLH Meade 2080/LXD75 (Big Blue) Meade DSI Color Meade DSI Pro TEC Cooled Celestron Neximage Celestron Radial Guider Star Guider Filter Wheel Vixen Flip Mirror Some Eyepieces Swift 7x50's Empty Wallet I.A.M.B.K. I ride. There fore I am...
Quote:I think the rountine should be altitude correction first, not azimuth first.
Warren - Stargazing since the 60's! Scopes: ETX-LS6, ED80T, AT6RC, Lunt LS60T, C9.25 Mounts: Atlas EQ-G, Vixen Portamount II Cameras: Atik 314L+,DMK31AU03,SSAG, ASI120MC Filters: Astrodon LRGB, Orion HA, SII, OIII Acc: Orion 5 place Filter wheels x 2, Flatman Primary Imaging site: Bortle Scale Class 6 Red Zone http://astrobin.com/users/rigel123/
Celestron Super C8+ (deforked) Atlas EQ-G Mount Celestron Onyx 80mm ED F Canon T4i (unmodified)
Jc ATM 10" F6.1, 1/25th wave spec (max wavefront error +/- 1/12.6 in zone 4 of 6, sodium light ), 6" F7 spec, 127mm F9.4 achro Refractor, Criterion DX8, 10 x 50 bin, SP mount/Synscan goto. ETX80 (finder) Canon 20D, PST DSI 1, Butenschön 125mm F13.4 refractor, diy spectroscope and curiosity
Quote:I'm not certain what exactly you are doing, but on the Atlas mount, the only time you use the alt or az bolts is when you are getting Polaris lined up in the finderscope. Other than that...
Uncle Rod Uncle Rod's Astroblog: http://uncle-rods.blogspot.com/
Quote:That's great! But where and how do I use it?
Quote:Unk,My Skywatcher AZ-EQ6 GT Mount (brother/syster of the Atlas) will be home soon. I read in the manual that "the SynScan hand control provides...polar alignment routine which can achieve extremely precise polar alignment". Is that for sure? Even for AP? I am very excited about that because polar alignment in the Southern hemisphere is not that simple. At least for a beginner like myself.
Orion 8" f3.9 Newtonian, Atlas EQ-G Cooled Canon 1100Da SSAG on 50mm Finder pocketrubbish.com
Quote:3.28 was not good on the polar align routine. 3.35 is better but not perfect. I use alignmaster and get great results.I find with the Atlas routine that I can't get repeatable results. I believe they are working on this and will release new version soon.As to only using the alt or Az bolts alone, they did try a version where you adjusted both at once but that produced even worst results.When I used 3.35 I tried to get as close to the center as possible over 4 iterations. It did get better as I progressed but I could then go a day and check again and the handset would tell me I was 3 degrees out!Your side by side arrangement might be causing you issues if the scope you are using is not exactly 90 degrees to the axis. Try with a one scope setup and see if that helps.
Quote:After having upgraded to v3.35 I was able to get a better result. It became clear to me that v3.28 was offsetting the mount by a long and non logical margin. Now The mount offsets in both ALT and AZ to positions that can be adjusted with only one axis at a time as the procedure suggests. Got down to less than a degree off in ALT and got up to 160sec unguided exposures. All seems well!
Quote:Is the polar align routine in firmware v3.35 a copy of Alignmaster software routine consdering you have to adjust the mount separately in AZ and ALT?
Quote:Hi allSpent the whole night trying to do the Polar re-align routine on my EQ6 mount with no success. I've just upgraded from a CG5 and was very familiar with ASPA (which was a breeze to get right and get great results!) but something seems off with Synscan! I'm running version 3.28 (upgrading today to 3.35). What I've failed to understand is: How can you ONLY use the AZ bolts or ONLY use the ALT bolts to align a star in the eyepiece without having to use BOTH AT THE SAME TIME??? I must have done 10 or 12 3-star alignments thinking I was off but each time when going into the polar routine my selected star (and I tried various from the very short list of maybe 5 stars available to you) would be off in both ALT and AZ by 3 or 4 degrees.So to sum up: After doing a successful 3-star alignment and heading into the polar re-align routine, selecting a star and centering it (using reticle ep) the star then is positioned by synscan to where it should be based on the user's input (time/date/lat/long/3 star alignmt) and asks to correct ONLY in Azimuth first (which is what I find odd and impossible to do!) and then veers off again and asks to correct ONLY in Altitude... is this right? In my case when needing to correct for AZ the star would be off in both AZ and ALT by a good margin which was impossible for me to correct using ONLY one of the two axis......I miss ASPA...
Zad Sky-Watcher USA 10" Collapsable Newt Orion 8" f/3.9 Imaging Newt Celestron C4-R (4" f/10 Acro Refractor) Celestron Omni XLT 150 OTA (6" f/5 Newt) Atlas EQ-G - Hypertuned 50mm finder/guidescope w/modified webcam CG-4 Mount with drive units Meade RB-60 for manual guidescope Canon Digital Rebel XT (350D)- Self Modified
Quote:According to the manual, you don't adjust the alt/az BOLTS, you adjust using the direction keys on the hand controller to slew to the target. Think of it this way: you are not adjusting the mount itself, you are training the computer as to how far off your mount is aligned, and in what direction, so it can compensate. As long as you are close to polar alignment, it shouldn't be a problem. That's why you can just rough align with the polar alignment scope.
Quote:Quote:According to the manual, you don't adjust the alt/az BOLTS, you adjust using the direction keys on the hand controller to slew to the target. Think of it this way: you are not adjusting the mount itself, you are training the computer as to how far off your mount is aligned, and in what direction, so it can compensate. As long as you are close to polar alignment, it shouldn't be a problem. That's why you can just rough align with the polar alignment scope. That isn't at all what is going on. The mount is not compensating for anything. The point is to allow you to easily adjust it in altitude and azimuth to get closer to the pole; that is all.
Correct me if I'm wrong but reading things like "it will automatically apply the recorded calibration data to compensate for the pointing error." sure makes it sound like the software is compensating for the pointing error of the mount. Not to mention if you follow the directions, how are you further aligning the physical orientation of the mount by slewing? You aren't, because slewing doesn't do that. You are just showing the software how far off the physical orientation is to true polar alignment, and the software compensates. At least that is how I understand it.
Quote:Ahhhh... I knew that when I was correcting Uncle Rod, I must have something confused. Thanks for clarifying. So what would be the point of doing a polar alignment vs. a goto alignment? Unguided imaging? Or does the mount in question lack a polar alignment scope?
Quote:You need to do both, to some extent anyway. You need at least a reasonably good polar alignment with this mount for good go-to accuracy in my experience. If you are imaging, you need as good a polar alignment as possible. If not, declination drift/field rotation will kill your images. AND you need to do as good a go-to alignment as possible to increase the accuracy of the SynScan polar alignment procedure.Me? In most cases, for 5 minute or less exposures or for visual or video observing, I find the good old polar alignment scope good enough. It is nice to have the AllStar polar alignment procedure available, however.
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