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astro-physics 600 E

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#1 egres

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Posted 16 August 2013 - 07:14 AM

hello all
i am in France, i buy an Astro-Physics 600E
who become service ( repair ? )
it is a very good mount, but i have a big problemm
i never do a god auto-guiding..i don't know why
i have a Starshoot aund PHD guiding

where can help me ?
( i will be in Washington from 12 sept...to 1 oct. )
thank for your help
serge = egres :foreheadslap: :rainbow:

#2 orlyandico

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Posted 16 August 2013 - 07:57 AM

let me guess.. declination guiding is problematic?

common problem on the 600E. I have one as well.

#3 egres

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Posted 16 August 2013 - 09:02 AM

thank you fot quickly answer
yes, problem guiding DEC
how do you do to have a good guiding ? if it is possible LOL
...
( it is a very good mount ...quiet, a very good GoTo, ..)
H E L P ...i want to make photos on 20 minits...

https://dl.dropboxus...5223/meduse.jpg

serge

#4 orlyandico

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Posted 16 August 2013 - 10:05 AM

"rainycityastro" on these forums has no problems guiding his 600E.

My 600E is non-GoTo (a QMD version). There is massive stiction in the DEC axis which causes the DEC to guide erratically. I have not solved this problem. The DEC axis has a large bronze bushing, not a ball bearing. I suspect this is the source of the problem.

You could try lubricating your DEC axis with Superlube.

Mine, I've done everything to it, and still no solution. I ended up buying a Mach1. I still have the 600E, because as you say it is a nice mount, and I want to get it working well.

#5 egres

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Posted 16 August 2013 - 10:51 AM

thank you orlyandico
i try to speak with rainycityastro
egres

#6 EddWen

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Posted 16 August 2013 - 10:59 AM

E-mail George at Astro-Physics. A-P are very good at supporting their product. Even the older equipment, and even if you are not the original owner. He may pass it on to Howard at A-P who is more of the mount specialist.

george@astro-physics.com

If needed, they will tell you where service in the EU can be found.

Good luck.

#7 orlyandico

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Posted 16 August 2013 - 12:05 PM

i did write to George and Howard...

This is the guide you want
http://www.astro-phy...00EGTOMaint.pdf

the lube to use is Lubriplate 105. i have actually not tried that...

#8 andysea

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Posted 16 August 2013 - 12:33 PM

+1 for Lubriplate 105. I have not used it on my AP mount but it has become my default lubricant. It's also dirt cheap.

#9 orlyandico

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Posted 16 August 2013 - 12:36 PM

Andy, aren't you rainycityastro's observing buddy?

He told me he was getting performance equivalent to your Mach1 from his 600E GTO, so he saw no need to upgrade.

Odd... because my 600 performs at a much lower level - particularly the DEC axis - than my Mach1. Heck if my 600's DEC behaved like a Mach1 - i would not have a Mach1.....

#10 andysea

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Posted 16 August 2013 - 03:20 PM

Yes I am, he says that his AP600 performs just as well as my Mach1. I think he means the RMS is the same.
On nights of good seeing i get 0.3" or better RMS.
I don't know how his dec guiding is tho.

#11 orlyandico

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Posted 16 August 2013 - 06:10 PM

the RA RMS on my 600 is 2X my Mach1.

there's no comparison on the DEC axis though.. :tonofbricks:

OP: if you use Maxim for guiding, there should be an L-shaped pattern in the calibration. with my 600, the pattern is more like an I. Even when the DEC calibration pulse is 5X longer than the RA pulse. The DEC is really unresponsive.

#12 rainycityastro

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Posted 17 August 2013 - 12:38 PM

Just saw this thread.
The 600E is a bit touchy and requires good balancing on both RA and dec axes. I think it is also more susceptble to winds than the mach1.
However I am happy overall with the guiding performance. I believe it is roughly equivalent on RA to a mach1. I was getting around 0.6 arc secs RMS last night. I think that was seeing limited. Dec is however noticeably worse. I might have to look into it.

I have not lubricated or even fixed backlash on the mount. I dont believe the prevoius owner did anything either. . I think with some maintenance, this 12 year old mount might do even better.

--Ram

#13 andysea

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Posted 17 August 2013 - 12:54 PM

Orly, Ram also pointed out that his mount has bearings and not bushings. That might make a huge difference.

#14 orlyandico

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Posted 17 August 2013 - 01:20 PM

Maybe the later 600E's had bearings.. but the AP lube guide I point to above shows that the declination also has a big bronze bushing.. and it's the DEC which is problematic. Also mine is silver, not white, and is from 1996. That makes it almost 20 years old.

I guess the money for the Mach1 shows up in the insensitivity to balance, instant response with minimal backlash, etc.

#15 andysea

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Posted 17 August 2013 - 08:10 PM

Well, the Mach1 has more powerful motors and I believe the RA and Dec gears are larger diameter.

#16 rainycityastro

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Posted 17 August 2013 - 11:19 PM

The Mach1 is a stronger, more robust and modern mount than the 600E. But if your payload is under 25-30 lbs, the 600E should perform very satisfactorily if it is well maintained.

I will probably step up to a 900 or 1100 as I await a TEC 160FL late this year.

#17 orlyandico

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Posted 18 August 2013 - 02:00 AM

incidentally i saw a Zeiss PaMont go for $1300 some months ago on astromart!!!

this is exactly the same as the 600E, except rebadged by Zeiss.

#18 egres

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Posted 18 August 2013 - 08:59 AM

thank you all






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