I no longer own the LX200. But, 7.342L comes up on the 750 handbox at boot
up. The mount is fairly old, at least 5 years. But I believe the guy who
owned the mount before me had the electronics upgraded, because the mount
box says it's an LXD700.

I use a ST7, but it does have a cord that plugs into the autoguider port of
the mount. No problems at all.

But, I did try a friends 208xt ccd camera as an autoguider plugged into the
autoguider port a few times. I could not get it to work. When ever I would
turn on the camera, the scope would started moving at guide speed to the
west. The hand box would lock up too, so that I couldn't use it to move the
scope back. This happened whether I turned the scope on first, then the
camera, or the other way around. I just assumed the cable was bad. I tried
another cable, and the same thing happened. I finally gave up, thinking it
was something wrong with the camera because the ST7 works fine. My friend
has yet to try the camera with his AP900 to confirm this.
----- Original Message -----
Sent: Wednesday, August 29, 2001 1:26 AM
Subject: Re: [M]: Re: LXD750 locks up when st-4 connected


>
>
>
> >From: "mnewton1" >Sorry for the change in topic, Tom. But I was wondering
> >how well your 750
> >tracks. I have one, and it isn't too good. Nowhere near the tracking I
had
> >with my 10" X200.
>
> Good to hear from another 750 owner.
>
> I can only tell you what the un pec trained performance is like as the
bugs
> I'm having are holding up getting it ready for astrophotography.
>
> The untrained periodic error moves a guidestar 1/6th of a field of a 12mm
> guiding eyepiece with a 2000mm fl tube. If I do my calcs right I make that
> about 2 to 3 arc minutes. I have what I think are software problems
> resulting in random loss of directional control - especially when pec
> training, so I can only complete about 1 in ten pec runs. However I did
get
> a good run in the other night and that holds the guide star to 2x the
> central guider box. If I could get more runs in I'm sure I could get it
much
> better. With that I got some reasonable 2 min runs unguided on NGC253 at
fl
> 1000mm I'll send you some pics for comparison if you like.
>
> Now I have some questions for you.
>
> How old is your mount & what version of the software comes up on your
LX200
> handpiece when you start - mine is 7.20M and I'm sure there's a bug in it
> causing my problems. I just checked the CCD port, found the 4 directional
> lines each with 5v on them but when I pull any of them low the handpiece
> locks up. All these lockup probs smell like software bugs to me.
>
> Do you use your with autoguider? If so do you pull your control lines low?
> ie 5v to ground?
>
> Apart from these annoying bugs I'm pleased with the robustness of the
mount,
> I've not "touched a fork mount LX200 but I have a 10" LX6 fork mount and
> that is shaky. The LXD750 is like a brick in comparison, I've leaned on
the
> OTA whilst taking pics and it does not even know I'm there!!
>
> There were two main reasons I got the 750. I wanted a GEM.
>
> I live in Australia and our most interesting objects are quite close to
the
> pole. I was sick of getting into camera jams with forks. The other reason
> was I was going to buy a G11 new but I read so many "bad" reports on their
> group about problems it seemed like the G11 is a project in itself rather
> than a tool to use. Maybe I read those postings wrong but there are heaps
of
> people forever changing worms, breaking motors, having probs with goto
etc.
> Finally there were delays with delivery on the G11 so I got this on
> Astromart.
>
> Hope that helps you - keep in touch as us LXD750 owners are rare!!
>
> Tom.
> >
> >
>
>
> _________________________________________________________________
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>
>
>

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