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dogeddie
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Reged: 03/26/10

Loc: Wisconsin, USA
poor go to possible reasons?
      #5661303 - 02/04/13 08:54 AM

I have recently acquired a used LX90 LNT that I have very poor GO TO with. I am using the original 497 handset. I understand the initial alignment stars are often a bit off. Normally with my ETX 125 after the alignment stars are centered, all is well from then on. Not so with this scope. Normally I can't even find items I want to go to in the finderscope or with spiral search.

I did a test I read posted elsewhere by Chris Erickson and found Sirius, then held enter for 3 seconds to confirm it as being correct, then manually slewed like 60 degrees each way from there, and then told the scope to GO TO Sirius, which it did wonderfully. Centered it beautifully. So something is right here. So why are the GO TOs after alignment so bad? Here are my thoughts on possible problems with poor GO TOs. I have rechecked all my data input several times (time, date, etc) so I am pretty sure that isn't it

1) The LNT is not levelling the scope correctly/accurately at set up? Bad LNT?

2)I use power from a wall outlet. Maybe I should use my Power tank instead?

3)The tripod always seems to have one brace ear not hit the tripod inside leg. I make sure it does by lifting the center braces until it does, but maybe something wrong there?

4) Try to set up without LNT and do a 2 star align and see what happens?

Any help is appreciated!


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neotesla
Pooh-Bah
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Reged: 11/18/10

Loc: Canada
Re: poor go to possible reasons? new [Re: dogeddie]
      #5661385 - 02/04/13 09:48 AM

Did you try training the drives? The LNT should be able to determine if the tripod is off level and compensate so the spreader issue would be more of a stability problem than anything else. Power from a AC/DC adapter should not be an issue, unless it is not giving enough power, check the amperage output, it should be in the range of 2.5 to 3.5 amps I believe.

To check the LNT module, if the LX90 is like the LX200 it is in the fork arm opposite the one with the clutch knob. If you remove the knob and the face plate the module is inside, and the critical part is the ball bearing in the track. It should be a sealed unit, but see if there is any visible debris or spider webs (yes I found some in mine).


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dogeddie
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Reged: 03/26/10

Loc: Wisconsin, USA
Re: poor go to possible reasons? new [Re: neotesla]
      #5661465 - 02/04/13 10:37 AM

Thanks. I have trained the drives several times, as well as calibrated the sensors to Polaris.

The LNT module is the old style that sits atop the scope with a coiled cord that plugs into an exterior auxiliary port. Circa 2005 or so.


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neotesla
Pooh-Bah
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Reged: 11/18/10

Loc: Canada
Re: poor go to possible reasons? new [Re: dogeddie]
      #5661658 - 02/04/13 12:25 PM

What GOTO targets are you trying, and what EP's are you using?

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Christopher EricksonModerator
Carpal Tunnel
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Reged: 05/08/06

Loc: Waikoloa Village, Hawaii
Re: poor go to possible reasons? new [Re: neotesla]
      #5661826 - 02/04/13 01:49 PM

Maybe try setting up and operating the scope without the LNT module connected and see how well it does.

Is the pointing error always in the same direction?

Is the pointing error in just one axis or in both?

How wobbly is the tripod with the spreader issue?


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dogeddie
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Reged: 03/26/10

Loc: Wisconsin, USA
Re: poor go to possible reasons? new [Re: neotesla]
      #5661867 - 02/04/13 02:09 PM

Quote:

What GOTO targets are you trying, and what EP's are you using?




26mm eyepiece - go to targets include Jupiter, M42, double cluster, Pleides - some were "Tonights Best" items


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dogeddie
sage


Reged: 03/26/10

Loc: Wisconsin, USA
Re: poor go to possible reasons? new [Re: Christopher Erickson]
      #5661875 - 02/04/13 02:13 PM

Quote:

Maybe try setting up and operating the scope without the LNT module connected and see how well it does. That is my plan, however the weather is un cooperative

Is the pointing error always in the same direction? I did not notice a pattern, but I guess I wasn't looking at that aspect. From memory I would say I am usually low and left of the target as viewed through the scope

Is the pointing error in just one axis or in both? appears to be both axes

How wobbly is the tripod with the spreader issue? tripod seems sturdy





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Christopher EricksonModerator
Carpal Tunnel
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Reged: 05/08/06

Loc: Waikoloa Village, Hawaii
Re: poor go to possible reasons? new [Re: dogeddie]
      #5661896 - 02/04/13 02:24 PM

Quote:

Quote:

Maybe try setting up and operating the scope without the LNT module connected and see how well it does. That is my plan, however the weather is un cooperative

Is the pointing error always in the same direction? I did not notice a pattern, but I guess I wasn't looking at that aspect. From memory I would say I am usually low and left of the target as viewed through the scope

Is the pointing error in just one axis or in both? appears to be both axes

How wobbly is the tripod with the spreader issue? tripod seems sturdy








Double-check to make sure that you have the right telescope model selected in Setup.


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dogeddie
sage


Reged: 03/26/10

Loc: Wisconsin, USA
Re: poor go to possible reasons? new [Re: Christopher Erickson]
      #5661918 - 02/04/13 02:35 PM

Thanks Chris, but I did that, too.
I had figured it was LNT related, but now that I think of it, doesn't the LNT module just assist in finding the first alignment star and that's it? If so, it wouldn't solve my problem whether it was there or not, would it?


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Christopher EricksonModerator
Carpal Tunnel
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Reged: 05/08/06

Loc: Waikoloa Village, Hawaii
Re: poor go to possible reasons? new [Re: dogeddie]
      #5661944 - 02/04/13 02:55 PM

Quote:

Thanks Chris, but I did that, too.
I had figured it was LNT related, but now that I think of it, doesn't the LNT module just assist in finding the first alignment star and that's it? If so, it wouldn't solve my problem whether it was there or not, would it?




Still a worthwhile and easy test to perform!


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dogeddie
sage


Reged: 03/26/10

Loc: Wisconsin, USA
Re: poor go to possible reasons? new [Re: Christopher Erickson]
      #5661970 - 02/04/13 03:14 PM

Agreed! The guy I got it from must not have been using the LNT as the batteries were shot when I got it. The night I used it at his house the GO TOs were fine; that's why I bought it! maybe there is something there....

One thing, do I need to turn the scope base a certain way or have the tripod legs a certain way to do a 2 star easy align? My last 2 scopes had LNT and I'm afraid I am a slave to technology in the aspect of 2 star align. Here's what I think I know:
1) level tripod
2) find Polaris, lock RA on it, lower and level OTA
3) enter time and date
4) do the alignment
sound about right?

I am also in need of a red dot finder and am unsure of a good model for the scope if anyone has suggestions.
Thanks

Edited by dogeddie (02/04/13 06:58 PM)


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Christopher EricksonModerator
Carpal Tunnel
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Reged: 05/08/06

Loc: Waikoloa Village, Hawaii
Re: poor go to possible reasons? new [Re: dogeddie]
      #5662370 - 02/04/13 07:47 PM

Quote:

Agreed! The guy I got it from must not have been using the LNT as the batteries were shot when I got it. The night I used it at his house the GO TOs were fine; that's why I bought it! maybe there is something there....

One thing, do I need to turn the scope base a certain way or have the tripod legs a certain way to do a 2 star easy align? My last 2 scopes had LNT and I'm afraid I am a slave to technology in the aspect of 2 star align. Here's what I think I know:
1) level tripod
2) find Polaris, lock RA on it, lower and level OTA
3) enter time and date
4) do the alignment
sound about right?

I am also in need of a red dot finder and am unsure of a good model for the scope if anyone has suggestions.
Thanks




I like the Rigel units much better than the Telrads. They stand higher and are easier to get your head behind. However once a GOTO scope is sky-aligned, you really don't need a finder any more.

And double-check the scope model selected in the Setup. Also take note if the error is on one axis or in both.

Having the wrong model selected will change the programmed axis motor gear ratios and could cause the GOTO errors yet returning to a syched object behavior that you are describing.

And moving Autostars between different scopes can mean that the wrong scope is selected in the Autostar.

Edited by Chris Erickson (02/04/13 07:48 PM)


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dogeddie
sage


Reged: 03/26/10

Loc: Wisconsin, USA
Re: poor go to possible reasons? new [Re: Christopher Erickson]
      #5662584 - 02/04/13 10:10 PM

Thanks, Chris. Is there an advantage in a Rigel or Telrad over a straight ol' red dot finder?

I will recheck the scope model listed in the Autostar again as I did move it from the ETX 125, but am pretty sure I checked that several times. Sure wish there was an obvious head slapper error like that I could find and get on with just viewing with the scope instead of farting around trying to get it to work.

Edited by dogeddie (02/04/13 10:11 PM)


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Christopher EricksonModerator
Carpal Tunnel
*****

Reged: 05/08/06

Loc: Waikoloa Village, Hawaii
Re: poor go to possible reasons? new [Re: dogeddie]
      #5662702 - 02/04/13 11:35 PM

Quote:

Thanks, Chris. Is there an advantage in a Rigel or Telrad over a straight ol' red dot finder?

I will recheck the scope model listed in the Autostar again as I did move it from the ETX 125, but am pretty sure I checked that several times. Sure wish there was an obvious head slapper error like that I could find and get on with just viewing with the scope instead of farting around trying to get it to work.




The biggest advantage of a Rigel over a Telrad is the extended height.

The biggest advantage of a Rigel and Telrad over the LNT red dot finder is height and larger view.


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Rick Woods
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Reged: 01/27/05

Loc: Inner Solar System
Re: poor go to possible reasons? new [Re: Christopher Erickson]
      #5666370 - 02/07/13 01:37 AM

Have you verified which direction the control panel base has to point at startup? My LX200GPS, when in alt-az mode, has to have the panel pointing south.
I believe the Classic LX200 had to point north.

Does it have GPS? Does it know where and when it is?

I've heard that Sirius is not a good star to align on, for some reason. Try aligning on a star more or less toward the celestial equator; like Betelgeuse or Rigel.

You said "...then held enter for 3 seconds to confirm it as being correct"; Did you hold it for the 3 seconds, then release, then press enter again to sync? (Silly question probably; but your statement didn't make it clear to me.)

You should be perfectly fine using AC power. That's all I've ever used, and no problems at all.


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dogeddie
sage


Reged: 03/26/10

Loc: Wisconsin, USA
Re: poor go to possible reasons? new [Re: Rick Woods]
      #5666646 - 02/07/13 08:45 AM

Rick, it is not a GPS scope and there is no mention of pointing the control panel base a certain way that I am aware of.I don't need to do it using the LNT that I am aware of, but am unsure whether I need to point it a certain way without using the LNT.

Sorry, I meant "synch", but couldn't remember the term

Right now, I may have found the issue, but the weather has been horrible. I believe it comes back to the tripod. The other day I was farting around in the basement with it and noticed that even though the RA lock was engaged, there was still rotation when pressure was applied by hand. Initially I thought the clutch was slipping, and the lock was clearly tight enough so I didn't want to crank that up any more. I am thinking that the tripod may have not been square enough when I put the OTA on it. I know I checked the base of the scope relationship to the tripod to make sure there was no "rocking" or give, and that was ok, but clearly it was still able to turn. Basically, the base of the scope was slipping on the top of the tripod, apparently due to a poor connection of the through bolt. I have since learned that a washer and wing nut spun down on the tripod before placing the OTA will square it up. I am hopeful that will cure my problems, if the stars ever do come out again!


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dogeddie
sage


Reged: 03/26/10

Loc: Wisconsin, USA
Re: poor go to possible reasons? new [Re: dogeddie]
      #5669709 - 02/08/13 08:16 PM

WOOT!! I had it out tonight and it it spot on!! I am very happy, and I love this scope! Thanks for all the suggestions. I am still using the LNT as well.

I believe it must have been the tripod issue. I squared it up as I mentioned above. Then I tightened the tripod bolt and RA lock until I was absolutely sure I was not getting any slipping by visually checking for movement when I tried to turn the scope by hand. (it was more than I thought would be necessary) That did the trick!


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cavefrog
Carpal Tunnel
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Reged: 11/11/08

Loc: loozyanna
Re: poor go to possible reasons? new [Re: dogeddie]
      #5670991 - 02/09/13 04:26 PM

glad you got'er done. but some things I might add are things learned from the ETX models. if one trades an HBX from one scope, even from the same model, they do not work all that well (if at all). when traded, they should be reset with the factory reset, calibrated, and then drives trained. perferably with a lighted reticle EP of 9-12mm. I had trouble with my ETX 125 not getting successful alignments untill I learned this. not that I was trading HBX's but the scope untill recently cured, was acting poorly. after spending much time, mostly on the training the drives part, it works great now.

just thought I would add my 2cents.

Theo


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sandybourne
member


Reged: 12/18/12

Loc: Texas
Re: poor go to possible reasons? new [Re: cavefrog]
      #5685246 - 02/17/13 01:36 PM

I have had issues with my new 10inch acf finding its targets, I called Meade who informed me it did not matter which direction the control panel faced(confused)!. I am unable to see Polaris due to the house being in the way but have a full view of the southern sky. It goes through its set up OK and GPS tells me it working,but.....!

I now use my 10 inch ACF as a clothes hanger after it couldn't even find a full moon. I bought the the wife a full gym membership to get her fit to lift the telescope out to the back yard only for her to run of with the fitness instructor na just joking

Any advice welcome.


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jrcrillyAdministrator
Refractor wienie no more
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Reged: 04/30/03

Loc: NE Ohio
Re: poor go to possible reasons? new [Re: sandybourne]
      #5685300 - 02/17/13 02:05 PM

Quote:

I called Meade who informed me it did not matter which direction the control panel faced(confused)!.




For mechanical reasons it should be within 30 degrees or so of South - but it does not need to be precise. The slowest alignment procedure is Autoalign and I don't use it for that reason, but using that can eliminate a lot of possible user error.

It's counter-intuitive, but that big, bright Moon which is so easy to find visually is by far the most difficult target for a telescope's computer. It is so near that proper motion must be calculated very precisely so the computer can determine its location relative to the background stars. One aligns the mount to stars so they are easy targets. Thus, any functional tests must first be on stars. If the mount can point to stars then you know everything works and the alignment is good. Then if it has trouble with Solar system objects, you know it's a date/time/time zone/location user error.


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sandybourne
member


Reged: 12/18/12

Loc: Texas
Re: poor go to possible reasons? new [Re: jrcrilly]
      #5685436 - 02/17/13 03:49 PM

Thanks JR.

I went over the time /date but think the GPS is not as accurate as I would presume maybe ?

I would say the biggest issue last evening was the 2 star set up. It would point to an area that when I looked through my 26mm eyepiece there was not one bright star in view?


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jrcrillyAdministrator
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Reged: 04/30/03

Loc: NE Ohio
Re: poor go to possible reasons? new [Re: sandybourne]
      #5686097 - 02/17/13 10:30 PM

Quote:

Thanks JR.

I went over the time /date but think the GPS is not as accurate as I would presume maybe ?

I would say the biggest issue last evening was the 2 star set up. It would point to an area that when I looked through my 26mm eyepiece there was not one bright star in view?




The GPS is plenty accurate but if users don't set the time zone correctly local time will be off by some number of hours. Then if they set the time manually to make the display right, the calculated GMT will be off by the same amount and the mount will be lost in space.

If the alignment star slews are way off, that is almost always a time zone user error. You can still continue to align by slewing however far you have to. After alignment, time/location don't matter at all except for Solar System objects so celestial objects will work fine.


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sandybourne
member


Reged: 12/18/12

Loc: Texas
Re: poor go to possible reasons? new [Re: jrcrilly]
      #5686214 - 02/17/13 11:47 PM

Thanks again for your kind input, will see how it all goes next time out.

Edited by sandybourne (02/17/13 11:48 PM)


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Christopher EricksonModerator
Carpal Tunnel
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Reged: 05/08/06

Loc: Waikoloa Village, Hawaii
Re: poor go to possible reasons? new [Re: sandybourne]
      #5686250 - 02/18/13 12:08 AM

Quote:

I have had issues with my new 10inch acf finding its targets, I called Meade who informed me it did not matter which direction the control panel faced(confused)!. I am unable to see Polaris due to the house being in the way but have a full view of the southern sky. It goes through its set up OK and GPS tells me it working,but.....!

I now use my 10 inch ACF as a clothes hanger after it couldn't even find a full moon. I bought the the wife a full gym membership to get her fit to lift the telescope out to the back yard only for her to run of with the fitness instructor na just joking

Any advice welcome.




Since the LX200GPS has a bunch of Moon targets in its database, you have to hit ENTER twice when the Moon is displayed before it will correctly slew to the Moon. The second ENTER is so the scope knows that you want to go to the Moon as a whole, versus the other Moon targets that you would see if you scrolled up or down.

I hope this helps!


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Christopher EricksonModerator
Carpal Tunnel
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Reged: 05/08/06

Loc: Waikoloa Village, Hawaii
Re: poor go to possible reasons? new [Re: sandybourne]
      #5686253 - 02/18/13 12:11 AM

Quote:

Thanks JR.

I went over the time /date but think the GPS is not as accurate as I would presume maybe ?

I would say the biggest issue last evening was the 2 star set up. It would point to an area that when I looked through my 26mm eyepiece there was not one bright star in view?




The GPS is deadly accurate. However the magnetic digital compass can be influenced by various things in the environment. This means the alignment stars can be off by a fair number of degrees when doing an initial alignment. This is normal and not cause for alarm.


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astrogeoguy
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Reged: 07/02/11

Loc: Thornhill, Ontario, Canada
Re: poor go to possible reasons? new [Re: Christopher Erickson]
      #5687963 - 02/18/13 10:29 PM

I often have to rotate my LS8 mount a few degrees after the find north step in order that the align stars be close. Too bad Meade didn't give us a chance to correct the north azim.

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jrcrillyAdministrator
Refractor wienie no more
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Reged: 04/30/03

Loc: NE Ohio
Re: poor go to possible reasons? new [Re: astrogeoguy]
      #5687973 - 02/18/13 10:34 PM

Quote:

I often have to rotate my LS8 mount a few degrees after the find north step in order that the align stars be close. Too bad Meade didn't give us a chance to correct the north azim.




Are you sure they didn't? The other compass-equipped Meade models have one. Look for a function labeled "Calibrate North".


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sandybourne
member


Reged: 12/18/12

Loc: Texas
Re: poor go to possible reasons? new [Re: Christopher Erickson]
      #5688097 - 02/18/13 11:58 PM

Quote:

Quote:

Thanks JR.

I went over the time /date but think the GPS is not as accurate as I would presume maybe ?

I would say the biggest issue last evening was the 2 star set up. It would point to an area that when I looked through my 26mm eyepiece there was not one bright star in view?




The GPS is deadly accurate. However the magnetic digital compass can be influenced by various things in the environment. This means the alignment stars can be off by a fair number of degrees when doing an initial alignment. This is normal and not cause for alarm.




Thanks Chris for your advice.


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dogeddie
sage


Reged: 03/26/10

Loc: Wisconsin, USA
Re: poor go to possible reasons? new [Re: dogeddie]
      #5689624 - 02/19/13 08:06 PM

Quote:

WOOT!! I had it out tonight and it it spot on!! I am very happy, and I love this scope! Thanks for all the suggestions. I am still using the LNT as well.

I believe it must have been the tripod issue. I squared it up as I mentioned above. Then I tightened the tripod bolt and RA lock until I was absolutely sure I was not getting any slipping by visually checking for movement when I tried to turn the scope by hand. (it was more than I thought would be necessary) That did the trick!




As a follow up for anyone who may have similar issues I picked up a 6x6x1/16" gasket rubber and cut it into a 6" circle, then cut a hole in the center for the through bolt. Before I put the scope on the tripod I lay the rubber on top of the tripod, which creates a zero slip surface for the scope to ride on. I don't have to tighten the bolt nearly as much, and it eliminated any slipping between the metal surfaces.


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astrogeoguy
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Reged: 07/02/11

Loc: Thornhill, Ontario, Canada
Re: poor go to possible reasons? new [Re: dogeddie]
      #5691458 - 02/20/13 06:15 PM

Nope - the LS scopes don't have a Calibrate North function. It wouldn't help if it did. It's local interference (cars, buried utilities, etc.) that throw off the north determination.

Chris


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vomit
member


Reged: 02/19/13

Re: poor go to possible reasons? new [Re: dogeddie]
      #5692910 - 02/21/13 03:03 PM

Quote:

Quote:

WOOT!! I had it out tonight and it it spot on!! I am very happy, and I love this scope! Thanks for all the suggestions. I am still using the LNT as well.

I believe it must have been the tripod issue. I squared it up as I mentioned above. Then I tightened the tripod bolt and RA lock until I was absolutely sure I was not getting any slipping by visually checking for movement when I tried to turn the scope by hand. (it was more than I thought would be necessary) That did the trick!




As a follow up for anyone who may have similar issues I picked up a 6x6x1/16" gasket rubber and cut it into a 6" circle, then cut a hole in the center for the through bolt. Before I put the scope on the tripod I lay the rubber on top of the tripod, which creates a zero slip surface for the scope to ride on. I don't have to tighten the bolt nearly as much, and it eliminated any slipping between the metal surfaces.




Good work, sir. I hope the LX90 gives you all it's worth. I read some of your nightmare scenario with Meade, and I am a little surprised you bought another. In all sincerity, however, that scope gave 8+ years with nary a problem.....except the Autostar *BLEEP*. I am a little worried about my new LX200....and trying to update through the ASU. For those who used Starpatch, what are your feelings on it?

Clear skies to you all....there are NONE in my immediate future.


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dogeddie
sage


Reged: 03/26/10

Loc: Wisconsin, USA
Re: poor go to possible reasons? new [Re: vomit]
      #5693292 - 02/21/13 06:24 PM

I found Starpatch very easy to use and used it to fix up the 497EP version of the Autostar I got from you. You may also want to use Andrew Johanson's My Scope utility, depending on what issues you are having. I used that to re install the "tours" that were missing from the Autostar.

You may want to start another post to call Andrew's attention to it, and I am sure he will steer you right.

Edited by dogeddie (02/21/13 06:25 PM)


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vomit
member


Reged: 02/19/13

Re: poor go to possible reasons? new [Re: dogeddie]
      #5693918 - 02/22/13 01:43 AM

Quote:

I found Starpatch very easy to use and used it to fix up the 497EP version of the Autostar I got from you. You may also want to use Andrew Johanson's My Scope utility, depending on what issues you are having. I used that to re install the "tours" that were missing from the Autostar.

You may want to start another post to call Andrew's attention to it, and I am sure he will steer you right.




Thanks. As of now, no "issues" to report except CLOUDY skies.....I did look through the scope today at the power plant in the distance. Also let it "align" and I accepted the "stars" where they said they would be. Than I slewed to Mercury....and it looked to be right on, i.e. near the sun. I am getting ornery waiting for clear skies!!


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sandybourne
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Reged: 12/18/12

Loc: Texas
Re: poor go to possible reasons? new [Re: vomit]
      #5725449 - 03/11/13 09:40 AM

Team, after taking your advice I managed to get a great night out with my LX200 10 acf. I invested in an illuminated reticule, went through your advised set up, used Rigel and Sirius for my 2 star alignment,success, set M42 in the Autostar and spent the rest of the session having some great views of the Orion Nebula . I experimented with various eyepieces and also got to use my new 2x Tele Vue Barlow.

Thanks again team for the input

Edited by sandybourne (03/11/13 10:06 PM)


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LoveChina61
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Reged: 06/20/09

Re: poor go to possible reasons? new [Re: sandybourne]
      #5733993 - 03/15/13 12:05 PM

For an alignment that will be more accurate in every direction, choose two guide stars that are at least 45 degrees apart and not too near the zenith.

Rigel and Sirius are relatively close together. Syncing on those two stars will be great for looking at objects in their immediate area (e.g Orion Nebula), but if you choose two stars farther apart like let's say Rigel and Regulus (on the chest of Leo) you should get remarkably accurate tracking all over the sky in any direction.

Continue enjoying!


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sandybourne
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Reged: 12/18/12

Loc: Texas
Re: poor go to possible reasons? new [Re: LoveChina61]
      #5736198 - 03/16/13 12:32 PM

Thanks , will give it a go next time out.

CS


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sandybourne
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Reged: 12/18/12

Loc: Texas
Re: poor go to possible reasons? new [Re: sandybourne]
      #5858445 - 05/13/13 07:56 PM

I have managed to get out again and things are improving, I have invested in an RDF and my illuminated reticule is great. I am still a little way out on the GPS after the 2 star set up.

I am going to attempt to train the drives and calibrate the sensors next time out.

I am unable to see Polaris from my set up location (house in way) so is there another star option available when you are requested to center Polaris during the sensor calibration ?


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clmbr256
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Reged: 05/08/13

Re: poor go to possible reasons? new [Re: sandybourne]
      #5858462 - 05/13/13 08:06 PM

My LX200 was way off one time, turns out that the tube was loose in the forks. Also it tends not to know about magnetic declination, its consistently 10 degrees off on its magnetic north in my local observing locations. There is a magnetic anomaly where I am that affects all compasses to a varying degree. Once aligned its really good all night long. I get away with one star often if the sky only has a small area open.

One thing I really hate is that the LX200 program picks starts in the west where the sun is setting. I can see stars in the east that can be used for alignment but despite the fact that the scope is aware of both sunset and astronomical sunset it picks stars that can't be seen for half an hour or so....

When I use my wedge in Eq mode I don't use the setting circles on the scope, they are not accurate. I use a digital level to ensure that the wedge plate is flat at 45 degrees, and that the scope is level across the forks, and at 45 degrees on the tube matching the wedge angle.

The altitude setting circle is adjustable, but even properly adjusted its only roughly accurate.


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Christopher EricksonModerator
Carpal Tunnel
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Reged: 05/08/06

Loc: Waikoloa Village, Hawaii
Re: poor go to possible reasons? new [Re: sandybourne]
      #5858497 - 05/13/13 08:33 PM

No. It must be Polaris for calibration of the internal digital compass.

Maybe consider moving the scope to a new location temporarily so you can do the sensor calibration.


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sandybourne
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Reged: 12/18/12

Loc: Texas
Re: poor go to possible reasons? new [Re: Christopher Erickson]
      #5858503 - 05/13/13 08:36 PM

Thanks for confirming that Chris.

I will try and set up in a new location,cheers.


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OzAndrewJ
scholastic sledgehammer
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Reged: 11/30/10

Re: poor go to possible reasons? new [Re: sandybourne]
      #5858567 - 05/13/13 09:08 PM

Gday Chris/All

For the purpose of doing a cal sensors
another rough way to do it is

a) Do a std align and confirm the general pointing is OK.
b) Do a "goto" to Polaris
c) When there, even tho you cant see it
just mark your setting circles
( I use masking tape with a fine pencil line at times )

Now start the cal sensors
When it asks you to centre Polaris
just slew to the premarked positions and hit enter.
This will normally get you within 1/2 a degree or better.

Andrew Johansen Melbourne Australia


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