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Need help with Celestron AVX!

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#26 Patrick

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Posted 21 January 2014 - 09:51 AM

PSS...I have the AVX and have no issues with the mount head moving with the center bolt installed.

BTW, if I'm not mistaken (going from memory here), but I think there IS a washer that Celestron provides that fits on the end of the center bolt where it clamps to the tripod head. If you didn't get that washer or you simple didn't install it, it could lead to the problem you're seeing.

I can check my mount tonight to see if there is a washer there. Maybe someone else knows?

Patrick

#27 MikeML

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Posted 21 January 2014 - 09:51 AM

What schluterdude recommended, try to add a washer or two to the tension screw.

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#28 Patrick

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Posted 21 January 2014 - 09:53 AM

Mike,

You nailed it! That's the washer I'm talking about. I think the AVX ships with a washer there.

Patrick

#29 schluterdude

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Posted 21 January 2014 - 09:57 AM

If that washer isn't there, that'd be the problem!

Does that shaft wobble when you rock your head?

#30 JPDucky

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Posted 21 January 2014 - 10:38 AM

Nope. The shaft is pretty solid. The only movement I'm getting is what I showed in the video.

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#31 MikeML

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Posted 21 January 2014 - 11:05 AM

Try adding an additional washer or two anyway.

#32 JPDucky

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Posted 21 January 2014 - 11:57 AM

I'll do that when I get home for sure.

#33 Mr Greybush

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Posted 21 January 2014 - 12:01 PM

adding a second washer might not work and may lead to worse condition. Why? less threads used to secure the mount itself. I suggest starting with a clean slate taking things apart including the alignment peg and start fresh. Sometimes this works I went nuts for 2 days with the same thing with my CGEM and found that the alignment peg wasn't tight enough. Not saying that this is the case I'm only saying that starting over sometimes cure's all. Then if you still have the problem send the mount back and get a replacement. Though not common it is a chance of a bad casting. I only know of one since the mount was made public last year.

#34 Patrick

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Posted 21 January 2014 - 12:02 PM

I'll take a look at my AVX when I get home too, to see if there are any other potential issues.

Patrick

#35 jimbo728

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Posted 21 January 2014 - 12:34 PM

The washer looks like about 1/8" thick on mine. Agree that if it`s not there, that`s the cause of no lockdown.
Let us know what you find.
Jim

#36 JPDucky

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Posted 21 January 2014 - 12:49 PM

It's about 1.2mm thick if I recall correctly

#37 MikeML

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Posted 21 January 2014 - 01:25 PM

I seriously doubt that adding another washer will cause him to strip out the threads, but you should always use caution.

#38 MikeML

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Posted 21 January 2014 - 01:41 PM

It's about 1.2mm thick if I recall correctly


Mine measures 2mm. The portion that screws into the mount head is 50mm from the tip of the threaded section to the shoulder. The threaded section is about 12mm long as is the amount it screws into the mount head.

#39 jimbo728

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Posted 21 January 2014 - 02:09 PM

The washer looks like a brass washer.
Jim

#40 Xeroid

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Posted 21 January 2014 - 03:07 PM

Maybe there is a 'gap' between the head and tripod?

Can you add one or two thick washers between the head tightening knob and tripod underside?


Tom

#41 dragonslayer1

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Posted 21 January 2014 - 03:52 PM

If you just purchased it and it was new, rather than start jerry rigging it, call whoever you got it from and see what they say, just an idea, Kasey

#42 JPDucky

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Posted 21 January 2014 - 06:45 PM

I just went home and checked, there is already a washer on there.

Oh and I tightened down the peg as hard as I could and it didn't do anything.

Here are the pics I took deviantart

#43 MikeML

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Posted 21 January 2014 - 07:09 PM

I just went home and checked, there is already a washer on there.


Add another

#44 schluterdude

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Posted 21 January 2014 - 08:12 PM

Is the jam nut on the alignment peg? Is it tight against the baseplate side? Don't thread the peg AND nut together into the mount all the way, and use the nut to tighten.

Thread the nut all the way up the peg, thread both down into the mount leaving a thread or two exposed UNDER the nut. Then, thread the nut down, hold the peg, and tighten the snot out of the jam nut.

#45 JPDucky

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Posted 21 January 2014 - 10:36 PM

They are both as tight as they will ever be on there.

#46 dragonslayer1

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Posted 22 January 2014 - 06:31 AM

Look at the peg and the wear spot, it appears to be as tho sliding off the face of it by the pictures, Kasey

#47 JPDucky

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Posted 22 January 2014 - 10:39 AM

Keep in mind the peg is on the opposite side that I use it on in the pictures, so the wear is not relative to its current position.

#48 rmollise

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Posted 22 January 2014 - 11:14 AM

If everything is tight and put together properly, something is wrong with the mount. The first VX I received had an improperly threaded bolt hole for the central bolt, the tripod bolt. Carefully threaded the bolt in and...it was locked in place so tightly it took a pipe wrench to get the mount head off the tripod. I also noted that the hole for the toe-saver on the counterweight shaft was improperly threaded; the toe-saver would not thread on all the way. The replacement mount was perfect.

Anyhoo...the two easiest things for you to do? Return the mount for a replacement, or fabricate some kind of big washer to place between mount and tripod head.

#49 Patrick

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Posted 22 January 2014 - 01:44 PM

Based on the wear spots on the casting I wonder if the mount head is actually seating properly.

#50 JPDucky

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Posted 22 January 2014 - 10:38 PM

I can't believe it, but I found another washer that fit and slapped it on there. Its tight now!






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