Thread: LX200 tracking
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  #19  
Old 30-06-2008, 03:23 PM
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rogerg (Roger)
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Join Date: Feb 2006
Location: Perth, Western Australia
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Quote:
Originally Posted by renormalised View Post
If it can run the new software and controller, get the new Autostar and ditch the old one.
You can't put an autostar controller into a classic LX. Only the classic LX HC (hand controller) will work. Absolutely no doubt about that.

Not relevant here I don't think, but it is possible to buy new ones, through BINTEL, not Meade.

Quote:
Originally Posted by renormalised View Post
It'll probably mean you'll have to run a firmware update on the controllers in the base of the Meade, but that won't be too demanding.
The only firmware update you can do with the LX200 classic is by taking out the two EPROM chips, using a chip-programmer to re-write their memory, then putting them back in. To get the latest firmware version which was made (4.31) you need to know someone who has it and is willing to give you a copy, meade will not give you a copy and will not admit there is anything newer than 4.30 available. It would be interesting to see what version you have (it says upon start-up) but I doubt it's your problem unless you recently bought the scope from someone in the northern hemisphere, then it's a chance.


Quote:
Originally Posted by BigJ View Post
- Roger: I remember seeing in the finder scope, the stars that had previously been aligned on the cross hairs had drifted to the right hand side, slightly lower down. Since the finder scope image is both upside down and back to front (I think), I guess this means the scope moved too far to the left (and up a tiny fraction).
At a guess it'd be RA error you're seeing then? With the hand controller, press mode until you get to the screen with RA and DEC. When you are not pressing anything, and it's not (in theory) slewing, are RA and Dec steady? They'll flick around a tiny bit, but are they basically sit steady, unless there's a problem. If one is moving, particularly RA, you have a hardware fault of some kind. If they're steady, I think your problem is more likely to be fixed by polar alignment, PEC, and perhaps changing the tracking frequency, which is configurable via the hand controller (will help more with that if we get to it).

I'd be interested to hear if your RA and Dec readings on the HC are staying steady or not (as per above).

Roger.

Last edited by rogerg; 30-06-2008 at 03:36 PM. Reason: Clarification of terminology
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