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Equipment Discussions >> Mounts

Pages: 1

Reged: 07/08/12

Loc: SF Bay Area CA
CGEM newbie question on slewing.
      #5444624 - 09/28/12 02:55 AM

I got CGEM DX a few weeks ago, and am trying to test run to see if the basic function works. I'm not trying to test the accuracy in pointing the stars or tracking yet, but just make sure slewing works as the first step.

When trying one star alignment, I selected the star and press the enter key. My understanding is that the mount is suppposed to slew to the target star. What I observe is DEC sometimes moves, but, at most of the time, it stays at the initial position that is set in a way DEC index marks align. It doesn't move in RA direction at all, however, I can see that the black ring between two RA index marks shown in the below pic rorates.

I'm not sure if I need to put a scope and counter weight to operate correctly. Currently, no scope or counter weights/shaft etc. are on the mount.

I'm a newbie and puzzled if this is an expected behavior while running one star alignment.
I'd appreciate for inptus from those who have experiences with CGEM/CGEM DX.

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scholastic sledgehammer

Reged: 05/09/10

Loc: Croatia
Re: CGEM newbie question on slewing. new [Re: southbay]
      #5444631 - 09/28/12 03:21 AM

Did you tighten RA and DEC locks?


Edited by orion69 (09/28/12 03:22 AM)

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Vendor - Deep Space Products

Reged: 05/07/07

Loc: Phoenix, AZ
Re: CGEM newbie question on slewing. new [Re: southbay]
      #5445063 - 09/28/12 11:40 AM

First, you need to run the mount balanced, even if you don't have a scope on it. No counter wieght = no balance. Running the mount completely unbalanced (with the clutches engaged) is not good for it. You will probably need to load a scope on it since you cannot easily balance the mount with nothing on it.

Second, it sounds like you have the clutches released. When that is the case, the ring that you have shown in your picture will rotate while the RA head does not move.

Finally, make sure that you are using a sufficient power supply. I recommend a minimum of 2.5 amps for a wall supply and a good sturdy 12V for a battery supply.

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