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glad to have found this group!
I'm a very inexperienced losmandy owner, trying to learn more about my G11.
By tgdavis61@... · #66809 ·
Re: Sawtooth pattern in DEC
Brian, Here is the guidelog from yesterday. The first calibration and 12.5 minute guide run are with the scope perpendicular to the polar axis. The second calibration was done because I rotated the
By Arun Hegde <arun.k.hegde@...> · #66808 ·
Re: Sawtooth pattern in DEC
actually that's why i want to see your baseline guiding. on one section of your guiding, it looks like pretty standard backlash that can be easily adjusted out on another run, it looks different:
By Brian Valente · #66807 ·
Re: Sawtooth pattern in DEC
Thanks, Jamie. That range is similar to what I get. I will post my baseline guiding log tonight, done with the scope perpendicular to the polar axis. A I recall, this gave me numbers close to 0.9"
By Arun Hegde <arun.k.hegde@...> · #66806 ·
Re: Sawtooth pattern in DEC
As long as it is set to use backlash compensation in PHD you should be good because it adjusts itself as time goes on. You can increase it so that takes less time. I'm usually somewhere close to
By Jamie Amendolagine · #66805 ·
Re: Live Video Presentations today, June 17 at 12pm PT
FYI, these times are Pacific Time. Adjust as needed for your particular time zone. -Bob
By Bob Ryan · #66804 ·
Re: Sawtooth pattern in DEC
Paul, I have a spring loaded worm so from what I am reading these are less susceptible to backlash?. Last night I ran? "baseline guiding". Tonight looks to be clear as well. I will repeat that and
By Arun Hegde <arun.k.hegde@...> · #66803 ·
Live Video Presentations today, June 17 at 12pm PT
** HARDCORE ASTRONOMY (NOT FOR THE FAINT OF HEART) ** https://telescopes.net/store/june-17th-hardcore-astronomy-not-for-the-faint-of-heart/ 12:00pm - 01:00pm - BRUCE WADDINGTON - PHD2 01:15pm -
Re: My backlash is larger than yours!
Hi! Yes, of course you are correct. However, the feeling that when the scope just "runs away" is a bit like the mount was suddenly confused. And of course, time and location is the first things to
By Magnus Larsson · #66801 ·
Re: Oldham Coupler replacement success?
Hi Taylor, I forgot to ask which drivetrain are you running on? Classic straight drive with two-piece worm blocks, classic straight drive with gen 1 OPW, tucked-in servos with two-piece worm
By Chip Louie · #66800 ·
Re: Sawtooth pattern in DEC
Didn't ask, but do you have a spring-loaded worm? If yes, backlash is less likely to be an issue. I don't use PHD, but there's a tool there to measure the amount of backlash and to then automatically
By Paul Kanevsky · #66799 ·
Re: Sawtooth pattern in DEC
Thanks, Paul. Should I use a different backlash setting in PHD2?
By Arun Hegde <arun.k.hegde@...> · #66798 ·
Re: Sawtooth pattern in DEC
Hi Arun, Possibly backlash. It takes a while for DEC to reverse direction. When it does, you see the large jump resulting in a saw-tooth-like pattern. Regards, -Paul
By Paul Kanevsky · #66797 ·
Sawtooth pattern in DEC
Hello, Attached is my guiding log from last night. I'm looking for some input on a sinusoidal or sawtooth pattern I'm seeing in DEC. Guiding in RA seems reasonable -0.54" RMS. The sawtooth pattern is
By Arun Hegde <arun.k.hegde@...> · #66796 ·
Re: Another night of Stellar Performance
SonnyE, I'm not sure what you are saying here. Are you saying the PHD2 PE data people use to debug and refine their mount's tracking is not valid and the data cannot be compared between mounts? --
By Chip Louie · #66795 ·
Re: Oldham Coupler replacement success?
Taylor, There are other types of couplers out there but they all have their own advantages and disadvantages. The best results have been produced with Oldham couplers in good condition where the
By Chip Louie · #66794 ·
Re: Oldham Coupler replacement success?
Anytime we would change out, or have to dismount a motor with a flexible coupling, we would have our machinist help with the final alignment. Of course, these were typically pumps running at much
By Sonny Edmonds <sonnyedmonds@...> · #66793 ·
Re: My backlash is larger than yours!
Sonny Good results speak for themselves! wrote:
By Brian Valente · #66792 ·
Re: My backlash is larger than yours!
In my experience, the Gemini 2 has been as infallible as it can be. Much better than most. It was just a strange thing to have happen. And I do believe it was before the Format and Repair of my mounts
By Sonny Edmonds <sonnyedmonds@...> · #66791 ·
Re: Oldham Coupler replacement success?
Taylor, The only study I found was from Michael Sinescalchi. His website www.helixgate.com described trying a Ruland coupler. It did not improve PE, maybe worsened it. No knowledge of other types of
By Michael Herman · #66790 ·