Author Topic: CGX sound at idle  (Read 758 times)

tmasnilypho

  • Active Astronomer
  • ***
  • Posts: 131
  • Activity:
    0%
  • Reputation: +0/-0
    • View Profile
Re: CGX sound at idle
« Reply #15 on: January 25, 2018, 03:32:35 PM »
I updated firmware when I received the CGX-L (about 2 weeks ago). My version appears to be slightly newer. It would appear Celestron is busy making changes.

MC version of 7.13.6350 and GEM version of 5.29.6225

dan
Seaside, Oregon

trigitsipo

  • Active Astronomer
  • ***
  • Posts: 136
  • Activity:
    0%
  • Reputation: +0/-0
    • View Profile
Re: CGX sound at idle
« Reply #16 on: February 03, 2018, 11:56:22 AM »
Quote
hi Jeff, quick update. I winterato Dan an another thread on this what seems like an anti-backlash dec motor issue and pretty benign at this point. I tried a reset and looked for your version but I am confused with your version number. What exactly are you upgrading? I have a list of firmware revisions form here (link below) and I am on what should be the latest revision for MC of 7.13.6223.  I also submitted a ticket. I was hoping to hear from them by now. So I'm not too worried just more disappointed with the lack of clear feedback from them and a little bit annoyed too by the fact that the belt is not centered on the wheels and there does not seem to be an adjustment screw. Does it work, YES. I see this as something that will need a hardware revision. I'm just hoping it tracks way better than the DX. I didn't want to shell out more $$ for Large. I can live with the buzzing DEC motor. Maybe they rushed this a tad to market. I have not completely set up yet. I will try and report back.

http://software.cele...ion_History.pdf

Belt misalignment is documented in my thread on the subject, including my interaction with Celestron. I did a mod to my CGX to fix the problem, its a combination of a bad choice of the motor drive sprocket and not enough range adjustment. I shimmed the motor mount to allow it to run parallel to the worm sprocket and that fixed the problem for me. CGX and CGX-L drive mount setup is identical. The L has slightly more torque but physically the motor is the same size.
Have a look at your worm spring loading adjustment, mine was locked down so tight that the worm and ring were binding. Check the worm spring adjustment procedure ar the back of the manual. You want about 1mm of pull back from the ring.

reaipasjime

  • Active Astronomer
  • ***
  • Posts: 107
  • Activity:
    0%
  • Reputation: +0/-0
    • View Profile
Re: CGX sound at idle
« Reply #17 on: February 09, 2018, 10:51:56 AM »
Hi guys, thanks for quick replies and info! I did see your thread on worm gear alignment. I checked mine, seems okay, when I put pressure on the motor, it does give about 1mm and when depressed, the dec gears do have some play, so I'm thinking mine is correct. I don't want to mess with that yet or the shim until I hear back from them on the motor noise or firmware. I don't think the latest firmware addresses the issue but lets see - all I think we need is confirmation from them on what the issue is and if they will address. Another option is that I can bring my mount to NEAF next week I think? and have them fix/replace my dec motor or swap it for another one. I really don't want exchange this or pay for shipping. So I'll wait and see. I am not going to use the mount until I hear back from them. Not too worried but trying to keep busy with other stuff - planning a pier and roll-off shed, so I can keep busy getting ready. Oh, on your shim, I was not sure what exactly you did at first: Edit (I went back to your post and I see now what you did. Nice idea - looks like this design needs an update to have an adjustment. Why did they do it this way? Nightmare. Mounts are 100 years old, they design one new thing and they kinda mess it up. I'm really disappointed with these guys just for doing it this way - way to take a good idea and mess it up. And its not about cost. Its about engineering - the only freaking moving parts on the entire system! Okay, done wit my rant.) I'm going to see what happens with tech support and the noise first. Maybe they will fix firmware or send me a new motor. I'll keep you posted.
thanks guys!