Celestron has no business selling these mounts. I have a CGX-L as well with wicked nasty RA... I have tried to adjust the worm gear and made a tiny bit of progress, but not enough. Your numbers were far worse than mine! I have two other mounts (EQ6R, and AM5) both outperform this mount by a very drastic amount!!! I have my EQ6R overloaded and I can still get solid guiding at 2000mm FL... with my CGX-L at 620mm FL (11" RASA) I can do about 60-120 seconds with crazy aggressive guiding :( Thank you for the video, I really appreciate seeing your struggles as it mirrors my own experience as well. I have come to the conclusion that these mounts are all just lemons sadly
I agree they could be better off the mark, I know they can be hypetuned, and get down to around 0.5", but why should we the end user have to do that! for me in Cyprus, it would cost around 700gbp + probably another 300+ in shipping costs. I'm going to tweak some more and look at everything to try and improve it further, last summer it was guiding at consistent 0.6" so I know it can do it.
Hi Dave . Curious , how are the grub screws retained in the hardware ? Friction fit or maybe LockTite ? Was there any grease , old or new , on the gears ? Glad you got it working and that you're looking and sounding OK . Cheers./SRK
Hi Scott, looks like it was just friction fit in the hex bolts. There is plenty of the original grease on the gears, I did collect some of it from around the main gear and spread it back onto the worm. It appears to be working fine so far, currently imaging the Rosette Nebula at 5 minute subs and they are looking good while live stacking in PixInsight
Cheers Chris, just be very cautious if you do things like this on any of your own gear. I just wish I knew how they factory calibrate these things, what tooling they have for doing it, whether it be dial gauges or whatever!
Yeh, will have to wait and see, it definitely got worse as we entered into the winter months, but it is working now, which is more than it was only a week ago!
Glad you managed to get this sorted Dave
Cheers Ollie.
Celestron has no business selling these mounts. I have a CGX-L as well with wicked nasty RA... I have tried to adjust the worm gear and made a tiny bit of progress, but not enough. Your numbers were far worse than mine! I have two other mounts (EQ6R, and AM5) both outperform this mount by a very drastic amount!!! I have my EQ6R overloaded and I can still get solid guiding at 2000mm FL... with my CGX-L at 620mm FL (11" RASA) I can do about 60-120 seconds with crazy aggressive guiding :(
Thank you for the video, I really appreciate seeing your struggles as it mirrors my own experience as well. I have come to the conclusion that these mounts are all just lemons sadly
I agree they could be better off the mark, I know they can be hypetuned, and get down to around 0.5", but why should we the end user have to do that! for me in Cyprus, it would cost around 700gbp + probably another 300+ in shipping costs. I'm going to tweak some more and look at everything to try and improve it further, last summer it was guiding at consistent 0.6" so I know it can do it.
Hi Dave . Curious , how are the grub screws retained in the hardware ? Friction fit or maybe LockTite ? Was there any grease , old or new , on the gears ? Glad you got it working and that you're looking and sounding OK . Cheers./SRK
Hi Scott, looks like it was just friction fit in the hex bolts. There is plenty of the original grease on the gears, I did collect some of it from around the main gear and spread it back onto the worm. It appears to be working fine so far, currently imaging the Rosette Nebula at 5 minute subs and they are looking good while live stacking in PixInsight
Very helpful video! Thank you!
Cheers Chris, just be very cautious if you do things like this on any of your own gear. I just wish I knew how they factory calibrate these things, what tooling they have for doing it, whether it be dial gauges or whatever!
How robust will the worm gear be in terms of repeatability going forward? Am thinking temp changes, wear n tear etc.
Yeh, will have to wait and see, it definitely got worse as we entered into the winter months, but it is working now, which is more than it was only a week ago!