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Equipment Discussions >> Mounts

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Jon_Doh
scholastic sledgehammer


Reged: 09/16/11

Loc: On a receiver's back
Re: Celestron VX mount: experiences and problems new [Re: rmollise]
      #6083444 - 09/16/13 09:00 AM

I've had hands and time on the AVX and I am badly disappointed, not to mention frustrated. So it's going back.

There just doesn't seem to be a decent goto mount at a reasonable price point.

Edited by Jon_Doh (09/16/13 12:56 PM)


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Dr.Don
member


Reged: 05/31/13

Loc: Northern California
Re: Celestron VX mount: experiences and problems new [Re: rmollise]
      #6083622 - 09/16/13 10:38 AM

How do people get their 9.25 attached to the scope? It seems very awkward and difficult. It's easy for me to move the mount from the house with the cw bar, but not weights attached. But getting the OTA onto the vixen is tough. Any hints? Maybe getting the mount into some particular orientation?

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Dr.Don
member


Reged: 05/31/13

Loc: Northern California
Re: Celestron VX mount: experiences and problems new [Re: Dr.Don]
      #6084430 - 09/16/13 05:59 PM

I meant how do people get the 9.25 OTA attached to the VX mount?

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dragonslayer1
Pooh-Bah


Reged: 02/25/12

Loc: SLC, UT
Re: Celestron VX mount: experiences and problems new [Re: Dr.Don]
      #6084528 - 09/16/13 07:04 PM

Hey Don,
I have a CG-5, is close to yours. I have my 9.25 marked with a piece of tape on the mount bar so I always get it in same spot for DEC balance. Then I position mount head so rail tension screws have handles towards me and facing up (away from DEC cover)... I will state I did go with the ADM saddle tho but the sequence should be the same.
Kasey


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ur7x
professor emeritus


Reged: 01/08/12

Re: Celestron VX mount: experiences and problems new [Re: Dr.Don]
      #6084668 - 09/16/13 08:19 PM

My next door neighbor custom order a 9.25 HD Edge for his VX mount... Both work spectacularly. Fast and easy setup and the HD optics are really nice.

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Dr.Don
member


Reged: 05/31/13

Loc: Northern California
Re: Celestron VX mount: experiences and problems new [Re: dragonslayer1]
      #6086300 - 09/17/13 04:08 PM

Thanks Kasey.
I will try it that way. It is very awkward to get the vixen bar into the mount saddle without another person helping.
Don


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cn register 5
scholastic sledgehammer


Reged: 12/26/12

Re: Celestron VX mount: experiences and problems new [Re: Dr.Don]
      #6086342 - 09/17/13 04:35 PM

What I do is have the AVX saddle horizontal with the screws at the top and screwed well out.
Hold the OTA horizontally and slip it into the saddle so it is held at the bottom. Hold it up and tighten the screws to hold it in place. I'm doing this with smaller scopes but the same thing should do.

I've seen all sorts of ingenious ways to support OTAs while attaching them to a mount, one was to put the OTA down on a stool pointing down, adjust the mount to the same orientation and slide the OTA across so it is in the mount, then tighten the screws.

Chris


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SunBlack
scholastic sledgehammer


Reged: 05/05/11

Loc: Rome (IT)
Re: Celestron VX mount: experiences and problems new [Re: cn register 5]
      #6094904 - 09/22/13 11:39 AM

Last night new sequence of PEC. After 4+2+ASPA, using 3x barlow and 9mm reticle eyepiece, I averaged 5 PEC sessions via PecTool. Then by photo session test, i'm arrived at 3 minutes at 0 Dec unguided, having only a micro Dec axis direction star trailing (<= 1 pixel), well corrected with the plugin StarRounder. Now, in respect to my ex Vixen GPDX, I improved by 50%. Tests carried out with a Canon 5d mkIII (pixel dimension 6.25) and Nikon 300mm telephoto.

I note a Dec axis stiffness, since i bought mount, so sometime i doubt if mount is well balanced in Dec. This stifness produces a backlash, which cannot be corrected by HC (i made some tests) , and at 2x motor speed, it's hard to make HC corrections (motor starts to move very late, exp in one direction). For now, a not big problem, when warranty expires, i'll take the mount for a fine tuning.


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Dr.Don
member


Reged: 05/31/13

Loc: Northern California
Re: Celestron VX mount: experiences and problems new [Re: SunBlack]
      #6177792 - 11/05/13 04:48 PM

Did anyone notice anything funny with the mount when we changed back to standard time? We were doing some observing, everything was working great, GOTO was fine. We had been testing eyepieces on M45 and after adding another calibration star everything went crazy. The mount suddenly decided M45, Capella, and Aldeberan were now below the horizon. We twice cycled power and tried to get an alignment but that failed. I verified each time that it didnt suddenly think we were in dual-scope mode because sometimes we thought it could possibly be off by 90 degrees. The location/RTC were correct. All of this happened around midnight PDT. The next day I did a factory reset and everything seems fine now. Was it just a coincidence that it happened during the switch from savings to standard time?

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SkipW
sage


Reged: 02/03/11

Loc: Oklahoma, USA
Re: Celestron VX mount: experiences and problems new [Re: Dr.Don]
      #6178166 - 11/05/13 08:47 PM

Does this mount even know about DST or do you have to tell it?

Midnight isn't when the shift happens, anyway. I'm betting coincidence.


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rmollise
Postmaster
*****

Reged: 07/06/07

Re: Celestron VX mount: experiences and problems new [Re: SkipW]
      #6178897 - 11/06/13 10:03 AM

You have to tell the mount about DST. Turn it off, now.

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Dr.Don
member


Reged: 05/31/13

Loc: Northern California
Re: Celestron VX mount: experiences and problems new [Re: rmollise]
      #6179975 - 11/06/13 08:44 PM

The mount does ask about DST. It was on because it was DST then. Of course it is off now. But even if it was a PDT/PST issue, that would be a pointing error of 15 degrees, not something around 60-90 degrees. What bothered me was that cycling the power and doing another alignment did not fix the problem. We did it again and same result.
Believe me, my son and I verified multiple times that it had the right location and time.
Two days later I did a factory reset and sanity returned. Perhaps just a coincidence with the time change, but the error is really bothersome.

Don


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rmollise
Postmaster
*****

Reged: 07/06/07

Re: Celestron VX mount: experiences and problems [Re: Dr.Don]
      #6180524 - 11/07/13 08:40 AM

I'd say "coincidence," since I was using the VX during the DST change and noted no weirdness.

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