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Equipment Discussions >> Mounts

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dragonslayer1
Pooh-Bah


Reged: 02/25/12

Loc: SLC, UT
Re: weird issue... new [Re: wargrafix]
      #6327891 - 01/22/14 09:18 AM

go into menu on youy handcontrol and see what it says when you pull up tracking. I don't have a VX but I believe it should say EQ South and Sidereel (you are in the southern hemisphere I believe.. Kasey

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rmollise
Postmaster
*****

Reged: 07/06/07

Re: weird issue... new [Re: wargrafix]
      #6327941 - 01/22/14 09:46 AM

As far as the objects being on the right, I would not, as I said some posts back on this convoluted thread, expect objects to be dead center. Not always. If they are in the eyepiece, I'd say "good enough."

The drifting? Simple. You need to tighten up your polar alignment. That is what causes drift. It's not clear how you polar aligned from your post. But if you want to minimize the drift you are seeing, do the built in AllStar polar alignment after your go-to alignment. That is assuming you have the tracking setup as the poster above alludes to.

Edited by rmollise (01/22/14 09:47 AM)


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wargrafix
sage


Reged: 04/10/13

Loc: Trinidad
Re: weird issue... new [Re: rmollise]
      #6327976 - 01/22/14 10:10 AM

I am in the north hemisphere. 10 degrees north.

Uncle rod I used the ASPA, that's how I have been finding my targets better. I did my first calibration and used ASPA and got things aligned using positioning and latitude. Its the drift that remains, I have a theory that once I tighten the polar alignment the drift will lessen. I may try again tonight if the weather and schedule permits.
While I know not to expect objects to be dead center always, for AP I will need to get it close as possible.

This has been a convoluted thread, but it seems i am getting there, no?


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guyroch
Vendor (BackyardEOS)
*****

Reged: 01/22/08

Loc: Under the clouds!
Re: weird issue... new [Re: wargrafix]
      #6328050 - 01/22/14 10:53 AM

Is the drift continuous or just for a small period of time after a slew?

If it's just for a small amount of time before it settles then it is probably backlash.

Guylain.


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wargrafix
sage


Reged: 04/10/13

Loc: Trinidad
Re: weird issue... new [Re: guyroch]
      #6328079 - 01/22/14 11:09 AM

Sadly it will settle on a target and over time, say minutes there will be motion. To better illustrate, it will be on the extreme right when it finds the target and after say 20 mins or so it would have drifted to the extreme left of the eyepiece

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rmollise
Postmaster
*****

Reged: 07/06/07

Re: weird issue... new [Re: wargrafix]
      #6328089 - 01/22/14 11:11 AM

Quote:

I am in the north hemisphere. 10 degrees north.

Uncle rod I used the ASPA, that's how I have been finding my targets better. I did my first calibration and used ASPA and got things aligned using positioning and latitude. Its the drift that remains, I have a theory that once I tighten the polar alignment the drift will lessen. I may try again tonight if the weather and schedule permits.
While I know not to expect objects to be dead center always, for AP I will need to get it close as possible.

This has been a convoluted thread, but it seems i am getting there, no?




Which direction is the drift? I mean E/W/N/S? if north/south, it is due to polar alignment.


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wargrafix
sage


Reged: 04/10/13

Loc: Trinidad
Re: weird issue... new [Re: rmollise]
      #6328260 - 01/22/14 12:26 PM

its south and drifts north. How do I fix it?

edit: if the orion nebula is right in the eyepiece and drifts to the left, that is south to north

Edited by wargrafix (01/22/14 12:31 PM)


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wargrafix
sage


Reged: 04/10/13

Loc: Trinidad
Re: weird issue... new [Re: wargrafix]
      #6329037 - 01/22/14 06:11 PM

Wanted to take out the mount tonight but clouds!

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wargrafix
sage


Reged: 04/10/13

Loc: Trinidad
Re: weird issue... new [Re: wargrafix]
      #6330467 - 01/23/14 11:56 AM

I was wondering whey celestron used those stickers to indicated mount home position rather than metal punches or emboss so that there would be no chance of the default position being lost.

Tonight i hope to do drift alignment


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rmollise
Postmaster
*****

Reged: 07/06/07

Re: weird issue... new [Re: wargrafix]
      #6330535 - 01/23/14 12:18 PM

The VX uses engraved marks rather than stickers...

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wargrafix
sage


Reged: 04/10/13

Loc: Trinidad
Re: weird issue... new [Re: rmollise]
      #6330604 - 01/23/14 12:48 PM

ah! I have seen the mount but I heard that it did. If I were to go over to celestron I would tell them," Oye, stamp arrows in all your mounts, put dew shields as part of the basic ota package and while you are at it, fire the people who made the alt az knobs....try fine tuning the mount with those for a while, lets see your fingers after that, Celestron execs!"

I like Celestron but I am not above tell them when they are foolish.I will pat them on the head though...the Advanced GT is a nice system to work with.


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wargrafix
sage


Reged: 04/10/13

Loc: Trinidad
Re: weird issue... new [Re: wargrafix]
      #6331935 - 01/24/14 04:57 AM

Ok. So last night I set out to solve the drift issue. Set up the mount within the triangle. Sighted my stars and made sure I got my calib stars and did aspa. Mount was level and everything. My goto still sent my targets either lower right or to the bottom. In thr case of m67, piece of the cluster is outside of the 25mm.
Those if you who so ap, is this common? Also do you just use the direction buttons to center it?

The drift was notably less. I moved the head in alt az a little. I hope this lessens the drift. The drift is south to north.


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rmollise
Postmaster
*****

Reged: 07/06/07

Re: weird issue... new [Re: wargrafix]
      #6332125 - 01/24/14 08:51 AM

Quote:

ah! I have seen the mount but I heard that it did. If I were to go over to celestron I would tell them," Oye, stamp arrows in all your mounts, put dew shields as part of the basic ota package and while you are at it, fire the people who made the alt az knobs....try fine tuning the mount with those for a while, lets see your fingers after that, Celestron execs!"

I like Celestron but I am not above tell them when they are foolish.I will pat them on the head though...the Advanced GT is a nice system to work with.




The altitude and azimuth knobs on the VX have also been improved significantly.


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rmollise
Postmaster
*****

Reged: 07/06/07

Re: weird issue... new [Re: wargrafix]
      #6332127 - 01/24/14 08:52 AM

Quote:

Ok. So last night I set out to solve the drift issue. Set up the mount within the triangle. Sighted my stars and made sure I got my calib stars and did aspa. Mount was level and everything. My goto still sent my targets either lower right or to the bottom. In thr case of m67, piece of the cluster is outside of the 25mm.
Those if you who so ap, is this common? Also do you just use the direction buttons to center it?

The drift was notably less. I moved the head in alt az a little. I hope this lessens the drift. The drift is south to north.




Sounds normal to me.


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wargrafix
sage


Reged: 04/10/13

Loc: Trinidad
Re: weird issue... new [Re: rmollise]
      #6332244 - 01/24/14 10:03 AM

ah ok, thank you. For AP proposes, moving the image to he center after goto had found it should keep it in view? I am asking this in the assumption i have done rough drift alignment.

The VX looks good, but I can't really afford another mount right now.


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dragonslayer1
Pooh-Bah


Reged: 02/25/12

Loc: SLC, UT
Re: weird issue... new [Re: wargrafix]
      #6332315 - 01/24/14 10:55 AM

after you center your target try sync to it and see what happens, Kasey

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rmollise
Postmaster
*****

Reged: 07/06/07

Re: weird issue... new [Re: dragonslayer1]
      #6332360 - 01/24/14 11:15 AM

Sync is really not the way to go. It might improve pointing in the area you are in, but it will THROW OFF pointing in other areas of the sky. If the mount is putting objects in the eyepiece, most of us would say "good enough."

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rmollise
Postmaster
*****

Reged: 07/06/07

Re: weird issue... new [Re: wargrafix]
      #6332364 - 01/24/14 11:17 AM

Quote:

ah ok, thank you. For AP proposes, moving the image to he center after goto had found it should keep it in view? I am asking this in the assumption i have done rough drift alignment.

The VX looks good, but I can't really afford another mount right now.




I'm not sure I understand your question. Yes, if you've done a halfway decent polar alignment, the object will stay in the eyepiece.


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wargrafix
sage


Reged: 04/10/13

Loc: Trinidad
Re: weird issue... new [Re: rmollise]
      #6332482 - 01/24/14 12:12 PM

I have seen when syncing a particular object might put other objects in the finder but nowhere in an eyepiece.

I will try to rephrase; If the object is showing up in the edge of say a 25mm eyepiece and I use the hand controller to move it to the center of the view, will it still track?

Edited by wargrafix (01/24/14 12:45 PM)


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schluterdude
super member


Reged: 08/05/13

Loc: Centerville, OH
Re: weird issue... new [Re: wargrafix]
      #6332755 - 01/24/14 02:08 PM

If you align your goto first, then ASPA, yes, pointing accuracy will change until you set up the GOTO again. You've mechanically moved the mount... Instead of using synch as a cheater (that's really meant for if you need to move the tube, like spinning a newt), use the "replace" function.

Pick an object, then go into the alignment menus. Somewhere in there is a list of objects you used originally. Select one of them and press enter, then choose replace. I can't remember exactly where the menu is, and I don't have my manual with me. I'll look it up later.

Or, power down, power up, and run the full goto setup again! Everything will come up dead nuts!


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