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Thread: StarNavigator NG 102MM motor Issue

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    Default StarNavigator NG 102MM motor Issue



    Hi, I recently purchased a StarNavigator NG 102MM for my birthday and got it all setup today. I put 8 new AA batteries in and fired it up. Immediately I noticed the motor would only move the scope on speed settings 8 and 9. Speed setting 8 seemed slow. If I try lower speeds I just hear a odd noise, as if the motor is struggling to move the mount. When I attempted to align the scope it would move to the star then the odd noise would start again and it wouldn't move anymore. I noticed it had a small circular battery inside so I replaced that too with no luck. Are there any other troubleshooting steps I can take or should I send this back? Any help is much appreciated, thanks.

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    Default Re: StarNavigator NG 102MM motor Issue

    Normally the slower speeds with be hard to see by eye unless you are looking through the eyepiece at a stationary object.
    If you are using rechargable batteries they will not be providing enough power as they are typically 1.2v and not the 1.5v of alkaline.
    The best is to get a 12v car starter jump pack which can be purchased quite cheaply at places such as Harbor Freight. https://www.harborfreight.com/3-in-1...ter-62306.html

    If the power is not the issue and you have gone through the manual step by step to make sure everything is proper and it still does not work properly, talk to the retailer about a replacement or fixing on warranty.
    Good luck and welcome to the forums
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    Default Re: StarNavigator NG 102MM motor Issue

    Hi, thanks for the welcome and quick response! I checked my batteries and they seem to be fine. They are 1.5v and non rechargeable.

    Anything under speed setting 8 seems to make the strange noise, it's hard to describe but it sounds like an old radio transmission, continuous strange beeps until I power off the device. The noise also occurs when I try to align the scope. It will move to the target location fine but once it stops the noise starts until I power it down again. I find it very hard to focus and enjoy the nights sky.

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    Default Re: StarNavigator NG 102MM motor Issue

    I have the previous version of that scope. It makes a lot of strange noises both when slewing and tracking. My scope does sound like it might be struggling with slew speeds of 5, 6, and 7. I don't think it is - it just sounds like it. I found a video on YouTube that at various places in the video shows the scope in motion. You can compare the sounds to yours: https://www.youtube.com/watch?v=pS1jn4mb5n4
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    Default Re: StarNavigator NG 102MM motor Issue

    Then I would discuss the issue with the retailer that you purchased it from, these types of mounts when tracking should be almost silent.
    Normally you need to put your ear next to it to hear the motors turning.
    Hopefully you can get this resolved right away
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    Default Re: StarNavigator NG 102MM motor Issue

    If that is a new scope, not second hand, call Meade Customer Support at 800-626-3233. The NG mounts are no longer made, but if you just now bought it new, then the warranty should be good. The AutoStar mounts do make some weird noises when they are simply tracking. It has to do with the plastic gears, and there are many of them in each drive train. Generally they have a rather rythmic singing sound. As long as the mount tracks reasonably well and can keep the object in the field of view for ten minutes, you are doing well. I have tuned an older version of the mount to hold an object in the field for up to an hour, but it did wabble around in the field some.

    If the scope seems to fight with you about the placement, like you use the arrow keys and put the object in the center of the field and the scope either wants to move the object some where else, or seems to sit there and not track for a little bit, then start tracking, then you need to go through the drive training procedure. I found going through the procedure maybe three times the first time you do it on a new mount seems to help somehow....not sure why.

    You might want to look closely at your batteries. Most of the AA batteries I have seen lately say they are 1.25 volts and not 1.5. The mounts do run with more authority on 12 volts, but you really have to make sure you have the polarity right or you will fry the motherboard in the mount.

    Hope this helps,
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    Default Re: StarNavigator NG 102MM motor Issue

    I have the older 90mm version of your telescope as well as four other goto telescope mounts. The Meade mount is far more noisey than my other mounts sounding like a banshee from hell in comparison. My other mounts which make essentially little to no noise. In spite of the screeches and whines the Meade mount acquires and tracks objects accurately.

    Pay attention to Bill's suggestions. He is very knowledgeable on matters concerning Meade mounts, especially their lower priced ones.
    Last edited by sxinias; 01-12-2019 at 04:09 AM.
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    Default Re: StarNavigator NG 102MM motor Issue

    Quote Originally Posted by TLucas55 View Post
    Hi, I recently purchased a StarNavigator NG 102MM for my birthday and got it all setup today. I put 8 new AA batteries in and fired it up. Immediately I noticed the motor would only move the scope on speed settings 8 and 9. Speed setting 8 seemed slow. If I try lower speeds I just hear a odd noise, as if the motor is struggling to move the mount. When I attempted to align the scope it would move to the star then the odd noise would start again and it wouldn't move anymore. I noticed it had a small circular battery inside so I replaced that too with no luck. Are there any other troubleshooting steps I can take or should I send this back? Any help is much appreciated, thanks.
    I presume that it is a brand new scope. I have a different Meade but I have a lot of experience with the AudioStar goto system. The first important step is to read the manual. There is a few steps to follow to get your scope ready : 1) Do a reset 2) do a drive calibration, 3) do drive training on the Az and Dec drives. The next important step is to make sure your tripod is level before you do a star alignment : if it has a build-in bubble level check that with another level for accuracy. then finally check that the OTA is level in all directions with a level. The slew speeds below 8 are very slow and below 7 you would hardly see the tube moving.
    good luck!
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    Default Re: StarNavigator NG 102MM motor Issue

    Thank you to everyone for your help! Such a nice community.

    I contacted Meade and they immediately sent me a replacement which arrived today. Unfortunately I am hearing the same noise. It only seems to happen when I align or goto, not when I use the arrow keys. Is this mount auto tracking after I align? It sounds like it is auto tracking on a very low speed setting causing this beep noise which in the dead of night can be very loud and distracting.

    Did I make a mistake buying this as my first scope? If so can anyone recommend a better beginner scope? I had some high powered binocs for a while and wanted something more powerful. I tried to do my research and was originally looking at the Orion 8-10" dob but the weight made me change my mind.

    I'm going to give the manual a proper read this weekend and go through the suggestions everyone posted. If I can't get the noise down I will probably end up returning it .

    Thanks again for all your help!

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    Default Re: StarNavigator NG 102MM motor Issue

    The Celestron 102SLT is a smilar scope to your Meade but without the noise issue. In my opinion, the Celestron SLT tripod and mount are significantly better than the Meades. The 102SLT can be purchased from many vendors - e.g. https://www.highpointscientific.com/...elescope-22096

    Orion Telescopes has their StarSeeker IV 150mm Newtonian on sale for $479 in their clearance section. The StarSeeker IV mount is pretty nice.
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