lindhoutd
Newbie
Posts: 14
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« on: August 10, 2009, 04:01:15 PM » |
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Whenever I look at the moon, and it is focused and even in sleep scope. It shakes around just a tiny bit. It looks (through the eyepiece) like the moon is vibrating a little bit almost. Why? How can i fix it?
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Mark Sibole
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« Reply #1 on: August 10, 2009, 08:25:59 PM » |
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Make sure the mount is all tight and the scope is balanced well.
Mark
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lindhoutd
Newbie
Posts: 14
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« Reply #2 on: August 12, 2009, 01:29:16 PM » |
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how do you balance the scope? and the mounts are tight
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Ov3rDoSe
Newbie
Posts: 2
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« Reply #3 on: October 08, 2009, 11:58:17 AM » |
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honestly, not to sound rude at all, but its probably you. I see this problem when i view through scopes or binoculars on a tripod with my parents. I have a perfectly steady view and they always say its shaking. Just check to make sure it isn't you touching to scope to make it move, and if this persists its probly just your own head shaking.
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tkish
Newbie
Posts: 6
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« Reply #4 on: October 17, 2009, 01:09:54 PM » |
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To balance a scope is using the clamshell mount and finding that point in the scope where it can balance on your hand. I would use the side of your hand but be poised to catch if it begins to slip. An activity to be done over a couch or not far off your lap. Balance the scope by using your hand as the center like the teeter totter on a school playground or a balance scale at a doctors office. Once you identified the balance point you mount the scope onto your clamshell clamp on the mount at the center of that point located by your test. A scope out of balance can be unstable to the most minor bump. Even the wind can trigger this. Essentially balancing your scope makes the mount perform its job better by evenly distributing your scopes weight on the tripod and on the motors. Barring all this, you can buy some pads to cut down on vibrations that go under the legs of your tripod. I do not own them but suspect they would do the job fine, $40 bucks though, try balancing first. Hope this is helpful.
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« Last Edit: October 17, 2009, 01:15:43 PM by tkish »
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lindhoutd
Newbie
Posts: 14
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« Reply #5 on: December 10, 2009, 01:55:33 PM » |
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thanks, i will try that, and even when i don't touch the scope, like, just set it up and focus on a target, i will not even look through the scope and within a few seconds it will be off slightly in both the x and y axises.
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MistrBadgr
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« Reply #6 on: December 10, 2009, 02:43:26 PM » |
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Tell me which scope you have and the color of the mount and tripod and I will see if I can give you some ideas.
Bill Steen
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lindhoutd
Newbie
Posts: 14
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« Reply #7 on: December 10, 2009, 03:02:28 PM » |
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the telescope is a DS-2090 i think. the mount is grey and black. same as the telescope.
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keithatrochdale
Newbie
Posts: 4
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« Reply #8 on: December 10, 2009, 04:14:58 PM » |
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Hi
I have one of those and it tracks very well, if a bit noisy. It would seem to me that you have not got your polar alignment quite right, or maybe not got the tripod level.
You will get a little bit of shimmering which may well be due to viewing conditions rather than anything else. What sort of magnification are you using on the moon?
Have you tried using the scope on terrestrial targets during the day? It is so much easier to have a play when you can see what you are doing.
Also it is very important to train your scope and tell it where you are, etc.
Sorry if I am teaching my Grandmother to suck eggs.........
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MistrBadgr
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« Reply #9 on: December 10, 2009, 05:24:59 PM » |
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The 2090 can have some vibration with tracking turned on due to its length.
There are other internal items within the mount that can cause this as well.
By the color of the mount, this is probably one of the newer AT-TC mount that have had a number of items fixed on it (at least I think they have) copared to the previous version. I will be able to comment more on that particular mount's internals, I hope, in a few weeks. For the previous version of the AT-TC mount, I have posted descriptions and steps to take to stop some of them.
The vibration may go along with the tracking issue, or they may be seperate. Additional thoughts to what the previous poster said:
If anyting like time, location, maybe altitude(if you have any input for this) can have an effect on tracking simply from the fact that you are looking from a different point on the earth than what the mount thinks. Be sure to double check those things.
There are different tracking modes. One is Lunar, one is sidreal (normal stars and things) and then terrestrial (I think) which means tracking is stopped. You might double check that.
If batteries are low, the temperature is low, or gearing is putting a larger than normal load on the motors, then the mount can turn slower than it thinks it is. The first two you can check with new batteries and trying to track something at a time when things are warmer.
If nothing seems to work, I would call and tell Meade customer service about the issues and tell them what you have done to resolve the problems. There is a possiblility of the first gear on a motor that is too large that could be causing both problems. It is made of vinyl, I think, for itw toughness. However that material is harder to control when making the gear and sometimes gives trouble. You may be able to trade mounts with them.
I will comment further in the future when I know more about this particular version of the AT mount.
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