In a message dated 3/31/2002 2:10:18 PM Pacific Standard Time, ... The larger the mount, the better the result. Roland Christen [Non-text portions of this...
Jim, Firstly when you say park are you talking about parking it with the sky ? If you have it parked, resume it, record it's RA/DEC/alt/az position. move it to...
In a message dated 3/31/2002 5:38:50 PM Pacific Standard Time, ... Yes, there is always a way to diagnose a problem. We would need to see both the servo box...
In a message dated 3/31/2002 5:55:08 PM Pacific Standard Time, ... There are many variable, such as camera type, binning, filter use, seeing length of exposure...
Absolutely. When I build my observatory I used 30" sonotubes. It was amusing carrying a 30" tube on the back of a Toyota pick up. I put in 8 J bolt's 3/4 inch...
Hi, I posted something similar to newastro last week, but thought it would be helpful to some if I posted this here as well. I have a 900GTO..no RA/PE issues...
Roland, I haven't tried one. I think I have some 2" filters but I'm not sure how good they are. Can't hurt to try. Sadly I just got home and I'm too tired to...
... Do you judge minimum DEC backlash by reversal in about 2 seconds at 1x rate? How does one know if you have a worm pinion tension problem? ... I'm a tad...
Hi, Mark, Thanks much for your reply; it is very useful. I just want to ensure we're talking about the same thing. Do you and your friend do CCD or film...
Hi Eric, You might want to consider wind buffiting the OTA. A windscreen could be a big help if your mount/pier isn't really beefy. Rich...
Rich N.
rnapo@...
Apr 2, 2002 9:08 am
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Roland, I more critically focused and took a bunch of images not in the murk and I was about AP4WIN is telling me 4 pixels but when I look at it with xpain or...
In a message dated 4/2/2002 2:57:51 AM Pacific Standard Time, lopez@... ... That's better than most people can achieve. I rarely get 1 arc second images,...
I'll try to answer your questions: All testing/calibration/guiding was done at 1x. I looked for "visual" delays upon reversal and found none that I could see....
I was testing my AP1200 the last week. The good news PE is 5.5 arc seconds measured at 3400mm FL. Now the problem. I set up the STV a with star at Dec 0...
I am re-thinking my pier from complete concrete to steel above grade level. Because of this, I want to ask what size steel pier (diameter) people have used....
Hi Bill: Why steel above grade? Removability? From what I've read, some steel piers ring and people fill them with sand or concrete to reduce the vibrations. ...
Max, The scenario seems very odd. You say the dec. started to drift "in dec."..this was not an RA drift?? Randy ... switched ... in ... some ... Why? ... ...
In a message dated 4/2/2002 8:51:04 AM Pacific Standard Time, ... The Dec axis is NOT driven. Any dec drift would be due to misalignment on the pole. If you...
Roland, Of course, what you stated is absolutely true. Thus my reply (asking Max if he was sure this wasn't RA drift) RA drift could be caused from polar...
Oops: that's actually .9 arc seconds per pixel. But AP4WIN says 4 or 3.6". But to me it looks more like 2 or 1.6. In a bit I'll try shorter exposures. I'm...
Well an all concrete pier is better but it's a bit expensive considering how much you need to do to get a single pour. My 16 pipe rings all right but it's...
Bill, I am using a steel pier only 6 inches in diameter and 40 inches high with no problems. The mount is an AP1200 and I image at a focal length of 3050 mm...
In a message dated 4/2/2002 4:01:53 PM Pacific Standard Time, lopez@... ... I doubt that you will ever record less than 1.6 to 2 pixels. 3 to 5 is more ...
From: <chris1011@...> ... Or just don't connect the DEC cable? The mount will track in RA right? The software would not detect the 'problem' until it tried...
In a message dated 4/2/2002 5:13:30 PM Pacific Standard Time, ... yers, that is correct. As long as you do not send a command to the dec axis, the servo will...
In a message dated 4/2/2002 5:32:10 PM Pacific Standard Time, ... Oh man, it must be getting late. I've been seeing too many Airy discs today. Roland Christen ...
Guy's and Gal's check out the new Astromart Forums there is a new Astro-Physics group forming. No advertsing, no flying banners or any such off topic nonsense ...
