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53 of 57 people found the following review helpful
on October 4, 2012
The Celestron motor drive is very cool and very, very "small"....

Received it overnight.. as usual.. from Amazon.com
Had already downloaded the insructions from The Celestron website. so I was familar with the unit and the installation instructions....

Proceeded to install the unit... OH MY!!! the RA shaft is TO BIG for the coupling.. a defective unit.. you say.. bad engineering....I was NOT a Happy Camper ...

Called Celsetron "CS" and was greeted with a 20 minute wait.. was finally connected to a fellow.. explained the issue... He said.. I don't know what the problem is as I have a unit right in front of me and the hole is fine.. it should fit the RA shaft with no problem... I mentioned it looked like the hole had a metal sleave which made the diameter to small to fit.. .. Too bad.. He said...send it back.. to us or Amazon..

So.. being a "problem solver" by nature... I removed the coupling from the motor shaft and took a closer look at at the rubber coupling which has two screw holes... one at each end.. I reversed the two screws and it fit.. The screws were assembled in reverse order at the factory... in China..of course.... as they are both the same diameter.. How "nice" for them.

So being a good "Amazon" customer... to help save my fellow customers some grief.. I called back to Celesrton and informed them of my findings.. AND... What do you think they said... OH YES... we are aware of that problem.. Well.. it appears I talked to the guy who did not get the memo.. as the second person was female... who knew all about the issue . good job... young lady.. and she expalined the fix... I called to tell them about..

When you receive your unit.. look at the rubber coulping at one end.. if the large finger screw is on the end with a metal sleave .. it is reversed... remove the coupling from the motor shaft . and reverse the screws.. replacing the small "allan set scew" at the end end with the metal sleave... THEN... the other end of the coupling will fit the RA shaft.. the one with the finger screw as as it has a larger diameter.
This may sound like "greek"..BUT, when you look at the unit you will understand.. and the unit will function as designed..

If the end with the "finger screw" has no metal sleave..you are "good to go"..
I was told a significant number of unts have this flaw.. the luck of the draw...for you

Hold your applause.. please
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22 of 22 people found the following review helpful
on February 8, 2014
Very easy to install, only needs the included hex key. Instructions are clear on where to mount it. Make sure you remove the corresponding (RA) knob on the telescope, or you will break the flexible aluminum motor mount coupler.

Put it on my Celestron PS 127EQ and it tracks Jupiter nicely (with an 8mm eyepiece, i.e. with good magnification). Telescope mount needs to be aligned with the North Star (Polaris) first.

Speed is adjusted with a small knob on the motor unit. For testing I found it tracks Jupiter for more than an hour with barely any adjustments.

Note that the only way to adjust right ascension once the motor is connected is to loosen the r.a. lock nut and then turn the scope manually.

EDIT: I have used it some more, and found it works rather nicely. As I said, you will need to align your telescope mount with the North Star first (polar alignment), at my latitude it is located at a fixed 34 degrees above the horizon. There is a small plastic knob to adjust the speed, and the reason for it is that you need to adjust the speed ONCE only. You are basically setting the angular speed by which it tracks an object in the sky, and that rate (for a given location) is the same for all stars and planets in the sky. It is best to adjust the speed at some higher magnification (say 8mm eyepiece), with a bright object such as Jupiter. This requires a bit of trial and error, watching say one of Jupiter's moons staying at the same distance from the edge of your viewing disk. The next day when you take the telescope out again, you will NOT need to adjust the speed any more.

EDIT 2: Three months have gone by and I still have to change the original battery ... my estimate so far is that one 9V battery will last something like 30+ hrs or use. See the pictures I posted on the right to see how well it works!

EDIT 3: I found that when the battery starts to run low, the speed will inevitably decrease a bit. That means it's time to swap out the battery, so always keep one handy. Of course in my case it happened right when I was trying to take some long exposures of the Andromeda galaxy ...

EDIT 4: Mine has been running for a year now without any issues whatsoever. During that time I went through about 3 9V battery sets, with about a long observation night every one to two weeks. Once in a while there is a star or planet location where that little plastic box is a bit in the way.
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10 of 10 people found the following review helpful
on March 19, 2012
I bought this piece to track planets with my Powerseeker 127 scope - Yes it fits the Powerseeker as well as the Astromaster. This unit is a lot of fun to play with, it is not very fancy but it does the job at a very reasonable cost. I especially like zooming in on Jupiter and tracking it at higher magnifications! Just be aware that when not tracking planets, this unit can get in the way and is probably best removed when just looking around at galaxies and star clusters. When using the EQ mount, sometimes you need to move your right ascension cable to the opposite side of the mount to accommodate the angle of the scope and the motor will be in the way.
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7 of 7 people found the following review helpful
on May 26, 2012
Installs easily on a an Astro Master 130EQ CG-3 mount. However since it is on the opposite side of the mount from a CG-2 it is upside down from the picture shown. It is fully functional but since it is on the opposite side of the mount the North - South hemisphere switch is also wrong. So if your in the Northern hemisphere put the switch to S or it will track in the wrong direction. You would think that would be mentioned in the instructions. I like that it runs on a 9V battery so I don't have to haul a big battery along like I do with my big scope. I don't know what the included Phillips screwdriver is for. Maybe it is needed for a CG-2 mount. The cover actually amplifies the drive motor sound. If you take the cover off it is quiet.

I recommend this product, it works well and is priced right.
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6 of 6 people found the following review helpful
on June 22, 2012
If you have a beginners EQ mount and would like to setup and track objects with very little effort this is the answer. I use this on my Celestron Powerseeker EQ 80 and it works ok after some tweaking as long as you are polar aligned this works just fine.
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3 of 3 people found the following review helpful
on November 18, 2013
Works well, but does not allow slow motion control to function while installed. Must loosen screw on motor drive attachment to allow functioning of slow motion control, then re-tighten to allow tracking. Not a very good system.
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5 of 6 people found the following review helpful
on February 9, 2013
This motor worked great for about 3 months then all of a sudden started smoking and that was it. All my attempts to contact Celestron to discuss what went wrong have been dismissed. Funny how when I had questions before purchasing they were more than helpful to try and sell me on it. You get what you pay for!
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1 of 1 people found the following review helpful
on July 12, 2014
For those living at North Hemisphere and have a CG-3, the hemisphere N/S switch must be switched to S (south hemisphere), vice versa at south hemisphere. This is not mentioned in the manual. For sure this motor was designed for a CG- 2 mount but on CG-3s (it looks mounted upside down in the photo) must be attached at the other end of RA shaft, moving shaft in reverse way.

It uses a simple voltage controlled oscillator to drive the motor and if you take care balancing the telescope to avoid heavy load on gears this stuff will last forever. If unbalanced a bit, do it in favor of motor's RA movement.
Shame the screws can't remain with the cover plate when unscrewed, can be lost easily outside at night.
You can go for a soda, come back and not to seek objects again.

No Vibration Suppression Pads needed.
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1 of 1 people found the following review helpful
on June 3, 2015
This low price unit attached easier to my Celestron 4.5" FirstScope reflector's equatorial mount. BTW, Celestron said it wouldn't. I did have to add a screw though. It mounted right into the existing axil screw (see pic). The Logic Drive works pretty flawlessly. You do have to initially adjust the speed setting, which varies if it's a star or a planet that you're tracking. I used a dot of sight paint to mark the speed settings desired. I haven't needed to replace the 9V battery yet. Overall decent quality and once aligned, saves you from constantly adjusting to keep the star, planet of nebula in your field of view. A very big plus!
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3 of 4 people found the following review helpful
on November 27, 2013
I've got one of these mounted on a Celestron Firstscope 114EQ. It seems to be of high quality with an aluminum (I think, but definitely not plastic) precision flex drive coupler. It also came with mounting brackets for two different equatorial mounts. The CG-2 and the CG-3. It works ok, but It's difficult to get the speed set exactly. The knob is only about 1/8" in diameter and has no scale or detents. So your only indication that you've made a change in the speed is a change in the sound of the drive running. You can do it, but it takes a lot of tinkering to get it perfect. It's fine for observing, but not smooth enough for long exposure astrophotography.
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