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Old 06-04-2010, 07:52 AM
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multiweb (Marc)
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Join Date: Oct 2007
Location: Sydney
Posts: 22,080
Quote:
Originally Posted by Hagar View Post
What sort of statement is this? .... Comments like that above do nothing but frustrate Pete further than he already is.
Take it easy Doug. No need to stir the pot when there's nothing to stir.

Quote:
Originally Posted by Exfso View Post
Marc, not too sure why you responded as you did, I replied to Fred in the thread just prior to yours explaining why I had not supplied the enformation. I am still trying to get my head around this problem and some of the statements being raised are somewhat foreign to me and I need time to work out what you are after. I am after all an old fart and not a guru at this particular stage of fault finding. This is a bit of a long an involved process and a lot of what is being asked has been covered whilst at the SV camp when John, Doug and myself gutted the mount. I do appreciate your input, but please hold back on the sarcasm, OK....
No Sarcasm Pete. Only trying to help. I'm still here aren't I? It was so bloody obvious to me that it is a simple mechanical problem that needed to be resolved from the beginning of this thread. I just asked a simple question twice and Fred picked up on it straight away because that was the very first thing that should have been checked from the word go. Reading on about swapping geminis, cables etc... was sooo painful. All it did was just confusing you even more and probably frustrated you even more. I thought that was funny what Fred posted at the time, that's all because I nearly gave up on this thread . I thought at the time is he the only one actually reading all the posts because it's like I'm talking to a wall? Now I'm no guru either and I've pulled my hair over tracking problems with the G11 and gemini so I can empathise with you, believe me and I have now some experience to share so I'll state a few things, feel free to grill me.

1_ When it comes to PHD guiding I have found it extremely reliable. If you can move sucessfuly the mount via GPUSB, Serial, whatever you're using from A to B, PHD WILL guide. That's a fact.

2_ If PHD doesn't guide properly and 1_ works then you have a mechanical issue, whether it's balance (too much of it or not enough of it) or clutch slippage, or (very) poor polar alignment.

Graphing you mount behaviour in PHD will tell you straight away what's wrong. Don't look at your camera viewport and think the star is not drifting, because visually you can't tell until it has moved a couple of pixels which at your image scale would be only a couple of arc seconds.

I guarantee you that if you get the DEC and RA tighter by only tracking and graphing in PHD then guiding will only be the icing on the cake. It'll work. As Doug said, you need a process of elimination. One step at a time and good enough tracking is the first step.

So if you could please post your Guider FL, camera pixel size and PHD tracking (not guiding) graph here we can have a look and work it out.

Last edited by multiweb; 06-04-2010 at 07:56 AM. Reason: spelling
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