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M4lcs67

Celestron Nexstar 127 SLT Mak Failing To Align

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Hello,

I bought this telescope last week and have been outside with it most nights weather permitting. While I have got the basics sorted I have now been trying to align the scope off 3 different stars, but it keeps coming back with alignment failed.

My garden is fairly dark and east facing.

I am following the instructions to the letter, but nothing doing so far. Don't know if anyone could shed some light on what I am doing wrong.

Thanks

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Are you absolutely recentering and pressing enter the moment you have made the last minute adjustment?, I wasn't and it took me ages to realise it and could never get an alignment.

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Hi, Not sure. Wasn't certain that it was so critical. Could that be the reason then? If the blasted clouds keep away i'll give it a whirl tonight.

Thanks

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Could be; first you slew to a star and then press enter iirc. Then you make a final micro adjustment and press enter again. Then it asks for stars 2 & 3 etc.

Try it in the house, fool it into thinking the stars are there to test it. That's what I used to do.

Edited by Veracocha

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Nice one. Thanks for that. I'll give it a try.

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Hi

Only thing I would really add is try and go for stars as wide apart as possible.

I did a skyalign last night and chose three stars spread across the arc of my view from my back garden.

I was out for over two hours and hit every target I input in the hand controller.

To be fair I've had evenings when this hasn't happened, but a lot of people on hear strongly recommend spreading your alignment targets as much as possible.

I'm sure you'll get it working.

Regards

Neil

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Quick check of the usual suspects (not intending to be patronizing):

Tripod level?

Lat & long entered correctly? E/W confusion is a common problem.

Date entered correctly? MM/DD/YY not DD/MM/YY

Time entered accurately? Daylight saving correct?

If it still is not working (and I could never get the skyalign to work satisfactorily) try going initially for a one-star align (east facing evening, Vega is a good star to use at the moment). If that aligns happily, use the GOTO to slew to another star (menu|named stars) e.g. Arcturus. Does it centre OK (use your longest widest eyepiece)? If it is close, centre it precisely and add it to the alignment stars (undo|align|replace unassigned|enter|align). If that works, and it then slews around the sky properly, you at least have a means of using the scope while you are trying to suss out what is wrong with the skyalign procedure.

HTH

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I go with DP on this, check EVERYTHING you entered. Don't assume anything, certainly do not assume that you must have put it in correctly and don't assume that the scope will know anything.

You know that Lat 52N and Long 2W is in the UK and in the 00 time zone, it has to be, but for some odd reason the scope has to be told the time zone and the Lat/Long.

As said West is -ve for some scopes. So unless you are in Essex, Suffolk, Norfolk or Kent you could have a -ve value - If that is the format they take.

Also level everything as much as possible, the scope is working out the errors it has to apply, could be that they are simply too great for the scope to guarantee an accurate goto when you request it. The message could simply be a generic one for: Too many errors to compensate for.

Edited by ronin

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I'm with DP on this also...Every time I've been out on alignment I had the date set the wrong way around or forgot daylight saving or made a bad choice re star selection. I would also recommend a illuminated cross hair eyepiece. Really improved my GOTO.

Good luck!

Mark

Edited by Specman

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DP is spot on. I have generally given up on skyalign as it fails for me far too often. I almost exclusively go for a two star align and find this very effective.

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I'll back that up as well with DP's comments

2 Star Align is best especially when viewing is good.

Down side ?...well you have to know a bit about astronomy to line up your first star, but hey that's what it's all about.

You'll know when the scope slews to the 2nd star just how accurate your alignment will be.

Hope it's clear tonight.

Looking ok up here so far ??????????????

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I had terrible problems with mine when I first got it - would try all the different alignments and it would seemingly go off with a mind of its own, I also found that it wouldn't let me change the long/lat settings, so did a factory reset of the software and voila - no problems since

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My 127 Mak (Celestron) was possibly the most simple & accurate system that I ever used, certainly better than my current Synscan 3/HEQ5Pro. Once I learnt to press enter to select the star and press enter again once I had finely adjusted to center it I found it was flawless.

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Thanks for all your comments. I'll keep on persevering. It will come i'm sure.

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Check everything at lest twice over.

One person on SGL was in the same position as you and said the same. EVERYTHING IS ENTERED CORRECT!!!

A visit from someone passing near to them 3 weeks later and after much swapping of ideas solved the problem in 5 minutes. They had entered Lat-Long not Long-Lat.

The scope thought it was close to the equator somewhere around the Bahamas, not Newcastle.

Edited by Capricorn

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The scope thought it was close to the equator somewhere around the Bahamas, not Newcastle.

So do I (not that I'm actually in Newcastle either!)

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Posted (edited)

Hello everyone,

I don't know if this topic is still alive but I have a different question. I have Mak. 127 SLT as well, I have no alignment problem, actually I can do every alignment (Skyalign, 2 star, Solar System Alignment etc.) easily. But, when I press a button in the hand control to find a planet or star, Scope goes to very close to the object but not precisely. I mean it goes to a little bit right of the target and you cannot see the star through eyepiece. You just need to adjust to get precise view. Is that normal? It is like, scope points an hour later the location of star than it should be right now. I double check my finder scope alignment and Daylight saving options.

Edited by ngunas

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What eye peice do you use to align, do you use your least powered and fine tune alignment then switch to higher and fine tune alignment again. Or are you aligning on least powered then go to with higher powered?

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Also, how far apart are your alignment points? Slight errors on close alignment points result in magnified errors as you move further away.

Alignment on my SE mount got a lot better when (1) I started using a reticle eyepiece, and (2) I started using points that were significantly different in both alt and az.

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