Celestron AVX shaky and noise issue, HELP
Posted 27 March 2013 - 08:22 AM
I want to ask you guys first before I call Celestron. I bought a Celestron AVX about a month ago, so far everything was great. Since last Friday, I feel like im having couple issues with this mount.
1. It's so shaky. Its never been this shaky before on this mount. I always balance my scope on my mount before observing. Once I go over 100x, it's very shaky. It looks worse than when I had CG4. My scope only weights 16 pounds. Meade 2" star diagonal and high power eyepieces I own do not weight more than 2 pounds. I'm pretty sure I'm not pushing its weight capacity for visual observing. I only need 1 counter weight that came with the mount which is located in near center of a shaft.
2. It's gotten louder. The mount is LOUD. I don't remember it being this loud.
What's wrong with my mount? This isn't normal, is it?
Posted 27 March 2013 - 08:57 AM
Also, are you using the tripod that came with the mount? Are you using it at it tallest position, legs fully extended? If so, have you tried it at it's shortest position, legs fully retracted, to see if the vibrations are less pronounced? -Tim
Posted 27 March 2013 - 09:23 AM
DEC motor is loud. Tripod legs are not fully extended, always about half way out. And yes I'm using the tripod that came with the mount.
I'm pretty sure it's balanced. I will take little bit more time to balance the mount.
on Friday, I noticed the shakiness. So on Monday I took more time to make sure it is balanced. I hope nothing is wrong with the mount.
Posted 27 March 2013 - 11:05 AM
If it's continuous vibration it might be a firmware bug. Such an issue was reported on certain CGEM beta firmwares..
Posted 27 March 2013 - 11:17 AM
Posted 27 March 2013 - 11:50 AM
Posted 27 March 2013 - 12:55 PM
If you are not touching the mount while viewing at high power is the image fairly steady? If so, then when you touch the scope to focus does the image jump all around?.....that's likely due to the the size/length of your OTA on that mount. -Tim
It vibrates when I'm observing with high a eyepiece while it's tracking. Touching anywhere on my scope will vibrate the view
Posted 28 March 2013 - 09:09 PM
There are a number of different kinds of shaky with a number of different causes.
The most common sources are: (1) mount head is not firmly screwed onto the tripod junction, (2) bolts holding tripod legs to tripod junction have gotten loose, (3) spreader is not firmly clamped against the legs, (4) azimuth adjustment bolts not tight against "N" post, (5) OTA not properly balanced, and probably a few more I'm forgetting. It's highly unlikely to be a mount issue if it wasn't shaky earlier and is shaky now. Almost certainly a set-up issue, which is good news.
Posted 28 March 2013 - 09:54 PM
It got loose some how, I hope that will fix the problem. One other thing about declination motor is that, it is quiet, but there is a spot when it rotates noise changes, it gets loud. I recorded, I will post it on YouTube shortly.
Thank you for your replies
Posted 28 March 2013 - 10:01 PM
As for the noise in a particular range of travel, that might be when the load changes sides (i.e., crossing the Dec axis balance point). Be sure to check your balance in both RA and Dec axes with the scope set up as you'd use it (finder, diagonal and eyepiece installed).
Best of luck!
Posted 28 March 2013 - 10:43 PM
I did the test without a scope nor a counter weight. It's taking forever to load up my video.
Posted 29 March 2013 - 12:56 AM
Posted 29 March 2013 - 11:28 AM
Posted 29 March 2013 - 12:55 PM
What kind of lube should I use? Lithium or Silicone? I'm scared to take these apart
Posted 29 March 2013 - 03:45 PM
Posted 30 March 2013 - 07:25 AM
That worked. I rotates few times. Mount head feels a bit stiffer, too. I doubt there will be any shaking issue. I can't wait until next clear night. Thank you very much
Posted 30 March 2013 - 01:50 PM