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Michael Morris
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Loc: Worcestershire, UK
How do I turn off RA drive on LX200?
      #5460790 - 10/08/12 03:00 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


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klyons
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Reged: 10/30/04

Re: How do I turn off RA drive on LX200? new [Re: Michael Morris]
      #5460812 - 10/08/12 03:13 PM

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

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Michael Morris
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Re: How do I turn off RA drive on LX200? new [Re: klyons]
      #5461030 - 10/08/12 06:04 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.

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Michael Morris
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Re: How do I turn off RA drive on LX200? new [Re: klyons]
      #5461031 - 10/08/12 06:04 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.

Edited by Michael Morris (10/08/12 06:05 PM)


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StarmanDan
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Re: How do I turn off RA drive on LX200? new [Re: klyons]
      #5461034 - 10/08/12 06:05 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.

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Michael Morris
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Re: How do I turn off RA drive on LX200? new [Re: StarmanDan]
      #5461161 - 10/08/12 07:40 PM

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

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imjeffp
Aluminum Falcon
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Reged: 09/30/03

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Re: How do I turn off RA drive on LX200? new [Re: Michael Morris]
      #5462167 - 10/09/12 01:57 PM

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

Scope is EQ mounted, yes?


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stanislas-jean
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Re: How do I turn off RA drive on LX200? new [Re: imjeffp]
      #5463240 - 10/10/12 01:43 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


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jchoy46
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Reged: 02/08/12

Loc: Port Orange, FL
Re: How do I turn off RA drive on LX200? new [Re: stanislas-jean]
      #5466478 - 10/12/12 08:21 AM

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

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imjeffp
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Re: How do I turn off RA drive on LX200? new [Re: jchoy46]
      #5467118 - 10/12/12 05:16 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.


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jgraham
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Re: How do I turn off RA drive on LX200? new [Re: imjeffp]
      #5468241 - 10/13/12 12:25 PM

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.

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ngchunter
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Re: How do I turn off RA drive on LX200? new [Re: jgraham]
      #5490496 - 10/26/12 04:11 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.

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Michael Morris
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Loc: Worcestershire, UK
Re: How do I turn off RA drive on LX200? new [Re: ngchunter]
      #5520733 - 11/15/12 08:26 AM

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

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