Question about Celestron Advanced C10-NGT (600 x 254mm) Telescope

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C10-NGT RA+DEC clamps and the motors

Hey, I have a question for you guys. I have a feeling it's going to be obvious. When using the motors in the C10-NGT reflector telescope model, do the RA and DEC clamps have to be tightened for no manual movement in order to use the motors at maximum efficiency? Or do you leave the clamps absolutely loose, so there can be manual movement, and motor movement? The only thing I've been trying is leaving the clamps loose; I'm afraid that I'll wreck the motors if I tighten the clamps and the motors will be trying to move, while the clamps are tightened.
So, leave the clamps tight or loose while using the motors?

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Holy man.. response is kinda slow. Good thing I tried it myself.

Sure as heck, you can leave the Right Ascension and Declination clamps tight while using the motors!
It makes a lot of sense, and many things much easier....
Thanks for the.. reply? lol. Just joking.

=)

Posted on Jan 10, 2008

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I just purchased a used Meade LX200 10" scope by mail. When I opened the box I found that the battery compartments AND the sheathing on the inside of both arms are missing. Have I been ripped off?


I assume you mean by sheathing the cabling to the RA and DEC motors and by battery compartment the control panel. If the seller stated that the scope was working, indeed you got ripped off. If by ratings you mean ebay I would contact them about a return and refund. If you got a great price, all is not lost since there is an upgrade to an autostar which will get you back in working order (but you need the RA and DEC motors). Autostar upgrade is about $ 520 but you will still need a 12V power supply. George Dudash 760 383 2741 sells these kits and can probably get the other parts you need to get going. I'm guessing this may cost around $ 800 total from what you say. If you paid more than $ 1000 for that scope I'm afraid you were ripped.

Mar 01, 2015 | Meade 10" LX200GPS Schmidt-Cassegrain...

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I have an older meade LX2000 EMC 10


The main problems encountered with the mechanics of the telescope centre around the mechanical swarf, grease compound, the liberal use of grease and the quality of machining of the main DEC and RA gears.
1. Remove the motors from the telescope. Be careful when removing either motor as there is a compression spring between the motor mounting frame and the worm shaft assembly.
The RA motor is located under the telescope body, removing the 4 screws and 2 Allen bolts will allow the bottom cover to be removed, thereby allowing access the the 2 Allen bolts holding the motor in place. Unplug the motor from the main PCB before removal.
The DEC motor is in the the fork arm containing the clutch and fine DEC adjustment control. (Never to be used with power applied to the scope). Remove the 3 small Allen screws holding the plastic cover plate in place and the DEC clutch knob to allow access to the motor. Remove the RJ45 connector located inside the telescope fork arm. Then remove the motor by unscrewing the 2 Allen bolts holding the motor in place.
2. Remove all grease from the motor worms, especially around the RA motor's magnetic pulse detector and the permanent magnet built into the worm shaft.
3. Remove all grease from the main DEC and RA gears, making sure to clean into the gear teeth.
4. Lightly re-grease with a Molybdenum Disulphide based grease (Castrol MS3 is great for this application if you can get it)
5. Assemble in reverse order. But before doing so, carry out the electrical adjustment above then, (a) relocate the the RA and DEC control PCB's in the vertical plane thereby gaining access to their respective backlash Allen screws. Adjust for 20thou max clearance when in final position. Note:- the DEC adjustment screw has to be replaced for a longer unit complete with a thin bolthead as this adjustment has to be carried out with a spanner....there is no room for an Allen key adjustment here.
6. A drop of Loctite must be applied after adjustment.
7. The final part of the process is to run in the gearing. Apply 12 volts to the motor wires, either at their respective plugs or to the motor direct. Allow to run for 2 to 3 hours in each direction by reversing the battery polarity to bed the teeth engagement. Remember to release the clutches.

Dec 28, 2011 | Optics

1 Answer

Hi Joe, My name is also Joe and I just bought a Celestron AstroMaster 114 and need a hand with the elevation,inclination, declination settings(what should my gauges be set to) to star using the unit. Any...


Your DEC is the same as your Latitude--

Right Ascension does not matter for now. Polar Align the scope on the star Polaris-- read this:

http://arnholm.org/astro/polar_alignment/index.html

Once you are polar aligned, rotate the tube to a star in the sky that you KNOW the name of. Look up the Right Ascension of that star on a cell phone app or a laptop planetarium program like this one:
www.stellarium.org

Rotate the RA setting circle so it matches what the phone or laptop indicate. LOCK down the RA circle. Your scope is now adjusted to the sky and you can use the numbers on the DEC and RA to find other objects of known RA & DEC.


www.telescopeman.org
www.telescopeman.us
www.telescopeman.info

Sep 02, 2011 | Celestron AstroMaster 114 AZ (50 x 114mm)...

1 Answer

I'm trying to use a T mount with a Canon DSLR. For some reason I can't get it to focus. Any help?


Sometimes certain cameras will NOT come to focus, especially in short tube reflector style telescopes. There is not enough back-focus to achieve focus.

Jul 21, 2011 | Celestron Advanced C10-NGT (600 x 254mm)...

1 Answer

Can you describe how to use RA and DEC to find objects. I can find the planets ect....


Once the scope is polar aligned move it to a named star that you can identify. Look up the RA and DEC for that NAMED star in any planetarium phone APP or a laptop running any planetarium software like the free software available at www.stellarium.org

Adjust the circles to MATCH the RA and DEC in the planetarium software, and lock them down.

Now you can use them to find other objects of known RA and DEC.

Apr 21, 2011 | Celestron PowerSeeker 127 EQ 21049 (750 x...

1 Answer

I have a CPC11GPS telescope that was working the last time I used it, which was 6 months ago. It is in NEW NEW condition. I pulled it out last night, turned it on, allowed the system to align itself using...


The clutch is not engaging in RA. Maybe the gears are not actually meshing together? A loose worm gear?

You can open it up and look and see if anything obvious is loose. Otherwise it's a trip back to Celestron.

Dec 04, 2009 | Celestron Optics

1 Answer

Cannot Collimate secondary mirror on celestron C10-NGT


you should try to call the company and see what they can do if not get your money back im come on

Mar 24, 2009 | Celestron Optics

1 Answer

LX90 Dec pointing out by 4 degrees over run


Go onto www.cloudynights.com and post this in the LX member forum-- and or go on YAHOO groups and post this in the LX90 forum--

Are you absolutely sure that your TIME and DATE and DAYLIGHT SAVINGS (yes-no) are correct.

On my LX90 the first alignment star is always NOT in the eyepiece but everything is OK once I center both alignment stars.

Feb 02, 2009 | Meade 8" LX90 LNT Schmidt Cassegrain...

1 Answer

ETX125 PE new model. Elevation has totally stopped.


Could be that the DEC motor driver has died. That could be verified by swapping the connections between the RA and DEC. If the DEC now moves, then that is the problem. If not, then the DEC motor is bad.

Nov 17, 2008 | Meade ETX Premier Edition: ETX105 PE...

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