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Celestron AVX dec axis bearing and other questions

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#1 mistyridge

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Posted 12 June 2013 - 07:05 PM

Does the Celestron AVX mount have a bearing on the Dec axis? Or, is it just steel on the Aluminum casting as in the CG-5. Also does the mount have a USB port for updating firmware and for computer control? Serial ports are not found on modern computers. Is 30lb the load limit?

#2 frito

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Posted 12 June 2013 - 08:37 PM

can't answer your questions but even if it don't have a USB port and i doubt it does its not like USB to serial adapters are expensive and they get the job done just fine.

#3 Mkofski

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Posted 12 June 2013 - 09:08 PM

No USB port and the published weight limit is 30 pounds. As stated before, an inexpensive Serial to USB adapter will allow you to connect your Mac or Windows computer to the mount. Don't know about the Dec axis bearings.

#4 zawijava

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Posted 12 June 2013 - 09:24 PM

per Celestron Tech Support, there are no DEC bearings. -Tim

Does the Celestron AVX mount have a bearing on the Dec axis? Or, is it just steel on the Aluminum casting as in the CG-5. Also does the mount have a USB port for updating firmware and for computer control? Serial ports are not found on modern computers. Is 30lb the load limit?



#5 Stew57

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Posted 12 June 2013 - 10:07 PM

A real over sight on Celestron's part. It would have been a great time for the improvement. Just imagine discovering the same thing on a $5000 mount.

#6 mistyridge

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Posted 12 June 2013 - 10:26 PM

I can understand no USB, but not fixing the bearing issue :confused: At least they could put in a brass insert(bushing). It would have far less friction than the bare aluminum casting (or a zert fittting so you could grease it). The 30lb max, but the CG-5 that I previously owned had a 35lb limit. I guess that is more realistic.

#7 cn register 5

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Posted 13 June 2013 - 03:13 AM

There is no bearing issue. Celestron fixed what people were calling a bearing issue in the motor control software.

If you have some religious issue about not using mounts with plain bearings then don't get an AVX.

Chris

#8 rmollise

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Posted 13 June 2013 - 07:10 AM

A real over sight on Celestron's part. It would have been a great time for the improvement. Just imagine discovering the same thing on a $5000 mount.


That would be shocking on a 5k mount. On a <1k mount? Not so much. ;)

#9 rmollise

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Posted 13 June 2013 - 07:12 AM

Does the Celestron AVX mount have a bearing on the Dec axis? Or, is it just steel on the Aluminum casting as in the CG-5. Also does the mount have a USB port for updating firmware and for computer control? Serial ports are not found on modern computers. Is 30lb the load limit?


Serial ports are not found on modern laptops, but it's easy enough to provide one with a USB - serial adapter. And good old RS-232 still has advantages for astronomy. For one thing, you don't have to use booster cables once your cable run goes over a few feet. ;)

#10 pjensen

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Posted 13 June 2013 - 10:44 AM

Also does the mount have a USB port for updating firmware and for computer control? Serial ports are not found on modern computers.


The beauty of serial (RS-232) is that it can go 50' - and even up to 1000' with low capacitance cables. USB distance is typically 6', maybe up to 15'. So serial is a low cost (and reliable) way to remotely control a mount & scope.

That is why it is still used.

#11 mistyridge

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Posted 13 June 2013 - 04:15 PM

Thanks. you all. Oh, Chris AKA "cn register 5" I have no problem with no bearings on a mount. I have used GEMs for years with nothing but pipe fitting. We just used big heavy mil surplus synchronus motors. Just wondered why C never saw fit to fix this. But I suppose most other sub $1000 GEMs are probably built the same way. They are not likely to fail moving a such low speeds. :shrug:

#12 ETXuser

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Posted 14 June 2013 - 08:41 PM

This maybe a daft Q but does Celestron grease the DEC axis on these AVX mounts?
I was wondering if a high quality grease is used or could be applied by a user at home without to much difficulty what do you say?

#13 rmollise

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Posted 15 June 2013 - 07:03 AM

I say _leave it alone_. Greasing anything will not help. It works quite well as it is, certainly somewhat better than the CG5...which I never had any problem autoguiding.






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