Quote:Supposed to be ready early next year.
Doug/W7DRM Nexstar 8SE, Orion 8" AG, AT65EDQ, CGEM (self-hypertuned), ST80/SSAG. Camera: Canon XSi (2) Mod & unmod, CLS clip. Software: AstroPlanner, Backyard EOS, DSS, PHD, PS-CS3 Member: Tacoma Astronomical Society (TAS), Olympic Astronomical Society (OAS) Astro Images:
Quote:I've finally seen this cogging for myself.I suspect the fix will entail keeping the motor powered even when its not moving so it doesn't slip back to one of the cog positions.
Quote:what does it look like, oscillations in dec?
Quote:but then, it could be a fix in the guiding software (phd...) as much as in the celestron firmware.For example, an option to change the rates or guide pulses in dec only.I use phd with short pulses (400ms), which is well enough to move the star 24 pixels during the North Dec calibration, in ~10-20 steps, but barely enough to move the star back south a few pixels.Is this due to backlash, cogging or both?
Quote:I wondered if that information about backlash (the amount of guiding pulses needed to reverse the direction in Dec) is used during guiding to reverse the dec guiding pulses, if there were an occasion to reverse corrections due to wind or whatever. The answer is no, PHD does not take that into consideration. Doug
Tak AP QSI Canon
Quote:You guys have far more patience than I have for sub standard equipment!! Typically I just get rid of it and swear off that manufacturer.I'm impressed with your perseverance!!
SCOPES: CPC1100; AT66ED; EdgeHD 8";SVR90T RAPTORMOUNTS: CGEM; Vixen GP2; iOptron Sky Tracker; Celestron AVXCAMERAS: Canon 60D;LodestarEYEPIECES:TV N31T5;Delos14;Delos8;Pan27; PL20;PL25;PL32;TMB9The Lord sits enthroned above the circle of the earth...He stretched out the heavens like a canopy.
Clear Skies! Mike ------------- My Site
Uncle Rod Uncle Rod's Astroblog: http://uncle-rods.blogspot.com/
Quote:I'm getting more and more convinced towards an atlas or the new azeq6pro...I would love to have a Cgem but...not the 8/3 error...
George You know you're getting on when the equipment you farmed with is showing up as suburban lawn ornaments.
Quote:I just checked mine - when I set the rate to 2, and look at the RA and DEC numbers, I dont see any pauses or movement back when moving the mount.Does this mean I dont have a cogging issue?
Quote:That was always the problem in the past. They had some software ideas to get rid of the cogging, but it always hard broke some other routines.Hopefully they can figure it out. I really liked my CGEM.
Scopes: 12.5" Dob w/Lightholder mirror, Astro Tech AT8RC, TPO 8" Imaging Newt, Intes MK-67 Deluxe, Tak FS-60CB, Tasco 10TE, Coronado PST
Quote:Dickbill, you'll need a cable like you use to do computer control.Also, they thought they had this fixed last year too. Don't hold your breath. The guy who does it ends up getting pulled to work other projects; they already have your money
Quote:I have had my CGEM for 6 months, and just noticed this issue last night. I ONLY had the issue when I was imaging East of the Meridian. Anything I started tracking in the West came out just fine.Does this fit into the category of this CGEM issue? Or would I see it East AND West of the meridian?