Gemini-1 Failure
Yesterday I was balancing my 2008 Losmandy G11, Gemini-1 using servo-motor current draw to fine tune the balance. At one point I used the hand controller to move the telescope to point at the
By
Russell Milton
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#83533
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Re: Unable to fully lock RA axis on G11
Hi John
I will take a look right now and report back.
Thanks.
Avi
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avishekaiyar@...
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#83532
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Re: Unable to fully lock RA axis on G11
Avi,
Chances are your clutch discs are very oil and/or severely worn. You will need to unscrew the clutch locks all the way off and pull the shaft up and out of the mount to inspect. Remember the
By
John Kmetz
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#83531
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Re: Unable to fully lock RA axis on G11
The clutches are just that.... friction clutches.? If any grease has made it onto the friction surfaces (and it will) they cannot be "locked".? NOR SHOULD THEY.? The more you tighten the clutches
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Paul Goelz
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#83530
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Re: Unable to fully lock RA axis on G11
Hi Paul
This is super valuable. I will try to take a video tomorrow and share it but based on what you are saying I think the mount is functioning normally.
The clutches do hold the telescope. But
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avishekaiyar@...
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#83529
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Re: Unable to fully lock RA axis on G11
Avi,
It is difficult to judge without seeing what you are doing.
You should always be reasonably balanced, the clutches are not designed to hold an unbalanced setup.
You should not tighten the
By
Paul Homer
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#83528
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Unable to fully lock RA axis on G11
Hello All
I am a brand new user of Losmandy mounts. My past experience with GEMs has been limited to the iOptron SGP and the Vixen GPDX.
I recently acquired a Celestron Losmandy G11.
I tried to
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avishekaiyar@...
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#83527
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Re: RA guiding awful after upgrade
Hi Tom,
I did the fan change on the 2600MM and I can't say it ever improved any of my images. But I don't think that would affect guiding on one side of the meridian versus the other. It sounds like
By
John Kmetz
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#83526
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Re: RA guiding awful after upgrade
One thing from the comment Derek made, if I grab the CW shaft it will move side to side slightly.
***
"slightly" is good.. as in a 1/16th of an inch..
I don't use an ASIAir, but it sounds like
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Derek C Breit
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#83525
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Re: RA guiding awful after upgrade
Mark,
I appreciate your comments and no, I am not looking for perfect guiding.? What is the saying...The perfect is the enemy of the good.? I did have one thought; could the camera fan, if it is out
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Thomas Kallenbach
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#83524
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Re: RA guiding awful after upgrade
A tiny amount of wiggle in each axis is normal.
Without any "lash" (aka wiggle, slop, choose your word) in one position (location on the worm) there is risk that the gears will bind on another.
The
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Mark Christensen
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#83523
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Re: RA guiding awful after upgrade
I contacted Losmandy but they weren't able to provide much help beyond check for dragging cables.? I admit, the photos I sent do show a bit of a cable mess but I am sure that is not the problem.?
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Thomas Kallenbach
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#83522
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Re: RA guiding awful after upgrade
That seems unlikely to help in this case. The RA Worm appears to behave well, with low error and low PE on the east side of the mount. It's still a good idea to measure the unguided worm performance,
By
Paul Kanevsky
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#83521
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Re: RA guiding awful after upgrade
Tom,
It is possible that you have an RA worm gear which is rougher on one side of the threads than the other, which would explain the change in guide performance after a flip. But that should not
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John Kmetz
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#83520
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Re: RA guiding awful after upgrade
Y'all are leaving out the NEW pier extension.. .. You installed BOTH a new RA eXT *and* a 12" pier extension, right??
My suggestion would be to take the fully loaded setup and loosen and retighten
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Derek C Breit
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#83519
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Re: RA guiding awful after upgrade
To follow up on my previous post Losmandy is an outstanding company in that the people really do their best to support the Losmandy community.? Losmandy fully, and I mean FULLY supports every mount
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Chip Louie
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#83518
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Re: RA guiding awful after upgrade
No. You use PHD2 to autoguide but turn off corrections.? This will display the guide scope data used for correction which will show you the mount's basic mechanical tracking accuracy.
--
Chip Louie
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Chip Louie
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#83517
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Re: RA guiding awful after upgrade
Can that be done in the day?
Just let it track?
Tom
By
Thomas Kallenbach
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#83516
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Re: RA guiding awful after upgrade
Tom, just making sure: the mount had no such problems before you installed the RA Extension? Did you test it well prior to the installation? As others have said, the extension should have no effect on
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Paul Kanevsky
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#83515
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Re: RA guiding awful after upgrade
There are many potential issues with used mounts and even more with the now classic Losmandy straight line drivetrain with the 2-piece worm bearing blocks.? There are several places where issues can
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Chip Louie
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#83514
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