Click here if you are having trouble logging into the forums Cloudy Nights - Official Forums of the 2009 International Year of Astronomy Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu.... uh, User   You are not logged in. [Login] Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Equipment Discussions >> Cats & Casses Previous   Index   Next   Threaded   Pages: 1 bob midiri super member Reged: 06/17/04 Posts: 145 Loc: pa 19320 Nexstar 5 Alignment problems       #2559403 - 08/04/08 12:17 PM Edit   Reply   Quote Quick Reply   Hi group. I have the original Nexstar 5 (Silver OTA) which I gave to my daughter. Last night while aligning the scope using auto align, the scope slewed to Vega. During the process of centering Vega using the up arrow on the HC, I noticed Vega continue to drift in the same direction after I took my finger off that (up/down) arrow direction button and went to the left/right arrow button to center in that direction. Any idea in what might be occuring? It makes it very difficult to atttempt an accurate alignment with this occuring. Do you think it might be the batteries? Or is there something more sinister occuring. Thanks Bob Midiri -------------------- Homemade 16"F6.5 dob Celestron Ultima 9.25 Celestron/Vixen Flourite 102F8.8 w Moonlight focuser Celestron C6RGT w DS moonlight focuser Cave 10"F6 Super Chrome deluxe C80ED F7.5 Skywatcher PRO ED 120 w W.O dual speed rotatable focuser Post Extras:       sang33ta professor emeritus Reged: 07/08/08 Posts: 539 Loc: UK Re: Nexstar 5 Alignment problems [Re: bob midiri]       #2559424 - 08/04/08 12:24 PM Edit   Reply   Quote Quick Reply   Probably gear slack / backlash it's normal, there is sometimes a compensation setting you adjust in the handset. Normaly you take your drives through a traning procedure which I assume calculates the adjustment required. -------------------- Hioptic 152mm f12.5 Maksutov Celestron Advanced CG5-GT Mount (Mr Noisy!) Meade 4000 Super Plossl Set Casio QV-2900UX Got fed up of waiting for Meade ETX-150 so put this together for £500/$1000 Edited by sang33ta (08/04/08 12:27 PM) Post Extras:       Bob Griffiths Post Laureate Reged: 10/10/05 Posts: 4178 Loc: Frederick Maryland Re: Nexstar 5 Alignment problems [Re: sang33ta]       #2559569 - 08/04/08 01:49 PM Edit   Reply   Quote Quick Reply   If it is drifting UP when you release the direction button it would be most likely caused by the your basklash settings... and to be honest I have no clue if the NS5 has both positive and negative settings for each axis... If it is drifting Down when you release the button I'd guess is that your altitude adjust nut need to be adjusted...This is assuming the scope is still fixed to the mount and is still very slightly rear end heavy... Adjusting the nut is a simple process..but I would NOT tighten it ore then 1/8 of a INCH ..not 1/8 of a TURN...then recheck how it works.. this can be easily done in daylight using a shingled roof or a brick wall as your background,... Bob G. -------------------- CPC1100 Nexstar 8i + GPS & Rays Brackets Denk S1 power switch Orion 100 mm Refractor Meade LXD 55 ...AR-5 127 mm Refractor Exploradome Observatory S.I.E. (Smiling Irish Eyes) 39*21'03" N 77*28'12" W Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 10 registered and 12 anonymous users are browsing this forum. 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