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Author Topic: Do you leave your DEC. connected on your EQ mount?  (Read 239 times)

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Offline Celestron8g8

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Do you leave your DEC. connected on your EQ mount?
« on: 21:43:51, 18 May, 2017 »
I read somewhere that some people never connect their DEC wire up to their EQ mount . Does anyone here ever use that method and if so do you image that way also ? I'm just tempted to try that someday soon but I want to make sure it's the DEC cable that you don't connect for this reason .
-Ron

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Offline Einari

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Re: Do you leave your DEC. connected on your EQ mount?
« Reply #1 on: 05:59:55, 19 May, 2017 »
Don't know if it's worth it - even if you had perfect polar alignment.
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Offline PaulB

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Re: Do you leave your DEC. connected on your EQ mount?
« Reply #2 on: 06:24:27, 19 May, 2017 »
If you don't connect both Cables GOTO will not work.
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Offline chris.bailey

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Re: Do you leave your DEC. connected on your EQ mount?
« Reply #3 on: 07:30:24, 19 May, 2017 »
Never heard of not connecting the Dec wire, I'm assuming you mean in the ST4 guide cable, but have heard of (and tried) not guiding in Dec by disabling it in Software. The Logic is that it stops the backlash effects of constant Dec reversals due to seeing. RA is different as it is constantly being driven and guiding just speeds up or slows down the rate. The downside is that you need to Polar Align to the point of zero Dec drift. This is different to the Polar Alignment for minimal field rotation. In practice this means doing a drift alignment close to the target, as Refraction and suchlike subtly changes the zero Dec drift alignment depending on where in the sky you are pointing. A better method is to Polar Align, accept some Dec drift and then only enable guide corrections in the direction it is drifting. PHD has settings to resist Dec reversal and this is probably a better approach overall. Certainly simpler.

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Offline Celestron8g8

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Re: Do you leave your DEC. connected on your EQ mount?
« Reply #4 on: 14:59:37, 19 May, 2017 »
Sorry I think I didn't explain better what my mount is , sorry . My mount is the older German EQ5 . Bought my scope in 97' and it came with tracking motors I had to self install and it's not a GoTo mount . The control only has R.A. and DEC. control . But in the past I read somewhere that some disconnect the DEC cable after alignment and use only R.A. . Just curious if anyone here ever did that and got decent results when imaging ? 
-Ron

Can't learn if you don't ask , First step is the starting point !!

 

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