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How do I turn off RA drive on LX200?

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#1 Michael Morris

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Posted 08 October 2012 - 02:00 PM

I'm getting in to double star observing and measuring double star separation and position angle. As part of the procedure for determining the position angle I'm going to have to turn the RA drive on and off on my 8" LX200 classic. How do I do this without powering down the whole scope?


Thanks

Thanks

#2 klyons

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Posted 08 October 2012 - 02:13 PM

You should be able to set it to "land" mode and the drive will stop.

#3 Michael Morris

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Posted 08 October 2012 - 05:04 PM

Okay that sounds logical. I guess this technique will loose any alignment data. I was hoping there would be an easily accessed 'park' mode where RA tracking was suspended but the alignment data was retained.

#4 Michael Morris

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Posted 08 October 2012 - 05:04 PM

Thanks, that sounds logical. I guess this technique will loose any alignment data. I was hoping there would be an easily accessed 'park' mode where RA tracking was suspended but the alignment data was retained.

#5 StarmanDan

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Posted 08 October 2012 - 05:05 PM

Not quite sure why you need to turn your tracking off to do this. For visual, you can simply use an astrometric eyepiece like this.

#6 Michael Morris

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Posted 08 October 2012 - 06:40 PM

For aligning the astrometric eyepiece (top of eyepiece facing exactly north).

#7 imjeffp

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Posted 09 October 2012 - 12:57 PM

Set the slew speed to "guide," "sidereal," or "1x" (whatever it's called) and slew east?

Scope is EQ mounted, yes?

#8 stanislas-jean

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Posted 10 October 2012 - 12:43 AM

Just necessary to acquire or fabricate a control box with 4 butons for E-W and N-S directions and plug this in the autoguide connector on the mount. If the HC is settled by 1x for autoguiding you will remote the mount with this speed in addition or in substract while the RA motor is tracking.
Easy to do and cheap.
Stanislas-Jean

#9 jchoy46

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Posted 12 October 2012 - 07:21 AM

or you can just put the scope into sleep mode and once you press a button it will wake up with everything retained.

#10 imjeffp

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Posted 12 October 2012 - 04:16 PM

No sleep mode on the Classic.

The box plugged into the guide port is a great idea if you're handy at that sort of thing.

#11 jgraham

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Posted 13 October 2012 - 11:25 AM

If you just need to turn the drive off for a bit and then back on you can use the Sync function. On the Autostar controllers you press and hold the Enter button for a few seconds, this turns the drives off so you can center the object, then start the drives again by pressing Enter again. I looked at the LX200 Classic manual and it looked like it had a similar funcion.

#12 ngchunter

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Posted 26 October 2012 - 03:11 PM

Unless I'm terribly, terribly mistaken, I believe "land" mode will retain all the alignment data. I've done this before and if I remember correctly, all the alignment data was retained.

#13 Michael Morris

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Posted 15 November 2012 - 08:26 AM

I realised I have a sleep dongle (http://www.telescope...info_AC399.html), which I can quickly and easily plug in and out, this does the job nicely.






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