How to build your own scope sleeper for a LX200

15 years 4 months ago #7353 by dave_lillis
Hi All,
You can build a very simple device which effectively halts all motor operations on a LX200, a so called sleeper mode.
You can leave the scope for a few hours and have it stop tracking, come back later, resume tracking by pluging the device out of the scope and you'll still have prefect allignment.

Why would you want to do this I hear you ask, well, you save on battery usage and motor wear.
Imagine its late night/early morning, and you want to have a look at Venus/Jupiter etc in daytime, this is where it would be very usefull.

I can see it working if you have the scope on a wedge (polar mode), but I 'm not sure ity would work in Altaz mode, as you'd need to "halt" the dec drive also, I'll give it a go and see how it works.
This is from a post I pickud up at the LX200 yahoo forum.
BTW, I'm not going to be responsible if you somehow blow your scopes electronics :)


If you'd like to make one, it would cost about 65 cents
(us$0.65) for a telephne RJ11 plug, and a bit of wire.
(a four-wire telephone line cord could be chopped to serve,
since they're "6 wide with 4 pins"... such as the serial
cord for the LX200gps).

All it is/does is constantly assert a "guide East" signal
into the CCD autoguider socket.

Which is a fancy way of saying "tie pins 2 and 3 together"
at the six-pin CCD socket. (Looking into the socket,
counting from the left as pin 1).

You would have to have your Guiding Rate set to 100%
for this to work perfectly.

Plug it in, and the scope should effectively stop tracking.

Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor

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15 years 4 months ago #7360 by michaeloconnell
Replied by michaeloconnell on topic Re: How to build your own scope sleeper for a LX200
Does the "Classic" not have a "Park" option?
This "Park" function is on the LX90 anyway, not sure about the newer LX200s.

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15 years 4 months ago #7361 by dave_lillis
Replied by dave_lillis on topic Re: How to build your own scope sleeper for a LX200
Michael,
There is no park command on the classic version of the scope, except for the 16inch version, which mine isn't, I didnt feel like spend $17000 on the scope at the time!

I have a simple program which can park the scope via a computer,
Remember the "classic" version (aka pre 2001) has permanent ROMS, i.e. you cannot update the database or add functionality.
Thats where the autostar has the advantage.

Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor

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15 years 4 months ago #7362 by dave_lillis
Replied by dave_lillis on topic Re: How to build your own scope sleeper for a LX200
Of course a simple way to halt the drives while leaving the scope turned on is to switch it to LAND mode, and switch it back to polar/altaz mode later when you need it.
Sometimes its the obvious things you miss.

Dave L. on facebook , See my images in flickr
Chairman. Shannonside Astronomy Club (Limerick)

Carrying around my 20" obsession is going to kill me,
but what a way to go. :)
+ 12"LX200, MK67, Meade2045, 4"refractor

Please Log in or Create an account to join the conversation.

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