MarkEON 80 - Twilight 2 | C11 - iEQ45 | Astro Physics 175EDF - 900GTO | Powered by Televue
Orion 190mm Mak-Newt iOptron iEQ45 - Modifications http://www.the3dwizard.net/index.php/astronomy/ieq45 Orion 80mm ST or 50mm Mini guider Orion StarShoot AutoGuider or QHY5L-II Canon 60D (modified by Brent Oliver) BackyardEOS, Sequence Generator Pro
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...
Dark Arts Observatory - Brockport, NY - Skyshed POD XL5 with iOptron iEQ45 Mount
Scopes: C8, C5, SV110 ED, EON-72 ED, ST 80, ATRC6, Megrez 90
Quote:A accurate initial polar alignment is critical, like the foundation of a house. Some suggestions, make sure your polar scope is accurately adjusted and aligned. There are several files on the iOptron Yahoo group explaining and illustrating how to do this.Using appropriate levels, square the mount in both axises. To minimize cone error in RA, set up your mount with the counterweight shaft aligned with the front (north) facing leg..use a plumb bob off the shaft perfectly intersecting the front leg and mark your RA basic setting. I use a small white tag on the RA joint, put a fine line on it and cut it at the joint with a razor knife, do the same with an OTA in the saddle and mark the DEC joint the same way. Now you have a 'base' repeatable setting.When performing a PA, to double check..center Polaris in the crosshairs in the polar scope, with an EP in the OTA, Polaris should be centered in the EP also. It may be off vertically, but you can't do anything about that unless your OTA plate has cone error adjusting screws. If it's off significantly horizontally in the EP, adjust the DEC manually and remark the joint. Turn the mount on and off to set the zero position again.Now you can adjust Polaris using the handcontroller position indicator to the correct position using the alt/az adjusters. Perform the 2 star align, or, if you are going to be slewing from Capella to Betelguese, perform the 3 star align routine for better pointing accuracy. I use the 2 star routine because I can't always see the 3d star from my viewing location.After each star align routine, return to the 'zero' position after adjusting the polar offset before doing another iteration.When you get to '00-00', or as close as you can, tighten the alt and az adjusters with the allen key...they will slip if just finger tightened, and it will ruin your perfect alignment. (I replaced the thin nylon washers with 1/8" nylon washers for this reason)Re; synching to stars. Any synch to a star will override your 2 or 3 star routine. It will improve pointing accuracy in that section of sky. I'm always synching to stars since I primarily image and need to frame up my targets..when I slew to the next target for imaging, it's always in my camera's FOV (2.25 x 1.50 degrees) so it works for me.Once your mount is setup and marked as described, every time you set it up it will become easier and faster with better results.Sorry for the long post, you probably know and/or do all of this, I just wanted to touch all the bases.My mount is the V2 with the 8407 controller also.
"Life is a journey, enjoy the ride" *********** Stellarvue 90 Raptor CF.Explore Scientific 152mm Comet Hunter.Orionx14g.Borg 125SD.Borg 60ED. Borg 50Achro. AT10RC. AT6RC. iOptron iEQ45GTN w/TDM.iOptron ZEQ25.iOptron Cube Pro.iOptron MT Pro/iOptron SmartEQ Pro.Celestron 10x50 Way too many EPs, flatteners and reducers. Nikon D5100, Canon T3i and a bunch of filters.
Lew is talking about not being able to center polaris with the main scope, not the polar scope. If the mount is properly aligned and does not have cone error, you should definitely be able to move the mount in such a way as to center Polaris in the main scope.