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Re: cable din 4 pin

 

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Unless of course there’s an external power supply for the camera that supplies all the voltages and only needs a 12V supply.

?

D.

?

From: [email protected] [mailto:[email protected]] On Behalf Of David C. Partridge
Sent: 27 August 2020 06:25
To: [email protected]
Subject: Re: [Losmandy_users_io] cable din 4 pin

?

No it won’t fit, and it would NOT work even with an adapter.? The camera requires +12V, ground, -12V and +5V – see appendix A2 of the user manual for the camera

?

The power output of the G1 only supplies ground and +12V

?

David

?

From: [email protected] [mailto:[email protected]] On Behalf Of Luis Barneo
Sent: 26 August 2020 23:52
To: [email protected]
Subject: Re: [Losmandy_users_io] cable din 4 pin

?

No. My question is not about autoguider connections, is about the electrical power supply. The box has two power connections. One "in", for electrical power supply of 12 V to the box. Next to it there is the "out" connection to supply power to devices. ST-8XE connect through a cable din 5 pins. The true question is if a male cable din 4 pin can fit in a female din? of 5 pins.

Luis

First successful tryout of my G11T mount

 

When it got dark I tried some modeling. I don’t know the names of hundreds of stars but I know Dubhe is not hanging around the northeast at ten pm. I went back and double checked all the data I had put into the mount.
Everything looked correct except that the scope wasn’t pointing anywhere near where stars should be. finally I realized that even though my longitude numbers were correct I had probably put myself in
the wrong hemisphere. My location in Utah is negative 111 degrees, not positive.?

As soon as I changed that one thing and finished modeling, I tried the goto. M13, dead center. M57, dead center. Jupiter, dead center, So was Saturn and the Moon. The new mount handled my C14 very?
well. Even with higher power eyepieces, there wasn’t much wiggle when I slewed the scope. What little reverberation there was, was gone almost immediately.?

So my new mount isn’t just pretty. It also works quite well.

The next step is autoguiding. I think I will try that with a smaller scope. ?
Re: cable din 4 pin

 

开云体育

No it won’t fit, and it would NOT work even with an adapter.? The camera requires +12V, ground, -12V and +5V – see appendix A2 of the user manual for the camera

?

The power output of the G1 only supplies ground and +12V

?

David

?

From: [email protected] [mailto:[email protected]] On Behalf Of Luis Barneo
Sent: 26 August 2020 23:52
To: [email protected]
Subject: Re: [Losmandy_users_io] cable din 4 pin

?

No. My question is not about autoguider connections, is about the electrical power supply. The box has two power connections. One "in", for electrical power supply of 12 V to the box. Next to it there is the "out" connection to supply power to devices. ST-8XE connect through a cable din 5 pins. The true question is if a male cable din 4 pin can fit in a female din? of 5 pins.

Luis

Re: worm turn with MUCH difficulty

 

Hi Tom,

If the worms don’t turn freely, you may need to clean and regrease the mount. Not just the worm and the worm wheel, but possibly also the needle bearings inside the axis.?

Are the worms rotating with difficulty even with the clutches loosened?

Regards,

? ? -Paul
Moderated Re: First clear night to try out my new G11T, I hope!

 

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Thanks, Michael. I have already experienced the collapsing leg thing. So far, the one thing I prefer about my CGX-L mount is the tripod legs can be locked with minimal effort. Last week when I mounted my C14 on my Losmandy mount for the first time, I kept wondering why the mount kept getting out of level. The legs were slipping and pushing into the grass. I have a 3/4 inch plywood square at the base of each leg in the photo. I am also cranking down those knobs tighter and almost sitting on the tripod to see if they are tight enough.

I have had my C14 edge for about a year and I have been using it more than?all my other scopes combined. It is big and awkward to move around but worth the effort, I think. I have been able?
to get some decent images of various things. When auto guiding was working well, and seeing was good, my C14 pulled out details and color that surprised me. It, kind of, hooked me on imaging
with the beast. The down side, is how much harder it is to make everything work well. Imaging with my little 80mm refractor seems effortless by comparison.

I am located in Salt Lake?City, Utah. My neighborhood is heavily light polluted, but an hour drive east or west gets me to, pretty decent, dark sites.?

I have been working on the back focus spacing. I need to find some way to vary the distance from my scope. I have been using Sony mirrorless full frame cameras, and they tend to expose any back focus errors, more than I would like.?

I always have fun, especially if I am away from my neighborhood in the desert to the west or mountains to the east. Getting out of town to do a great hobby can be a wonderful thing, especially
lately.?

If Losmandy was still making the Titan, I think I would have spent the extra cash just for extra stability while using my C14.?

Have a great evening, Michael, and thanks?for all the great information and help!

Jeff



From: [email protected] <[email protected]> on behalf of Michael Herman <mherman346@...>
Sent: Wednesday, August 26, 2020 8:08 PM
To: [email protected] <[email protected]>
Subject: Re: [Losmandy_users_io] First clear night to try out my new G11T, I hope!
?
Wow.? Great setup.? I'm not used to seeing a Titan RA axis.??

A few things to?consider:

Be sure your knobs holding the tripod sections in place are quite tight.? My C14's weight was slowly collapsing one leg, though I was sure it was tight... and if I had not caught it...yikes.??

You are in a grassy area.? Be sure your tipod feet are on solid?ground, like large flagstones.??

If using an EdgeHD be aware the back focus is ideally 5.75 inches past the rear lens.? There is not much room for a filter wheel or ADC optic.? If you try to extend your camera focal plane out past that, you can end up with a coma problem.? The normal SCTs don't have this particular focal plane issue.? But (Newtonians with) a Baader MPC also have the similar back focus constraint (that one is 55mm).? ?The penalties of "coma free" can come at a price.??

(Where are you located? You hinted at Utah, but....)

Have fun!

Michael

On Wed, Aug 26, 2020, 6:09 PM jeff marston <jeffmarston@...> wrote:


I am all set up and ready to go. For the last week, fires in California and Utah have made seeing anything an exercise in futility.?
Today, the skies have been blue, instead of brown, and the clouds are supposed to be few and far between. If seeing is decent
I hope to get some videos of Jupiter and Saturn. I made two attempts last week and weekend, but even stars directly overhead
were dim. Jupiter looked more like a giant Mars, with huge dust storms. I am hoping tonight will be great viewing and videoing.

Moderated Re: First clear night to try out my new G11T, I hope!

 

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Thanks, Brian. I think I have the worm gears set at a nice compromise, not too loose, not too noisy. My goal was to get a mount that was sturdier than my Celestron mount so I could do some autoguiding and imaging with my SCT's. I think I have the sturdier part taken care of. The C14/G11T combination is steadier than my CGX-L for visual. So far, so good!

Jeff

From: [email protected] <[email protected]> on behalf of Brian Valente <bvalente@...>
Sent: Wednesday, August 26, 2020 7:09 PM
To: [email protected] <[email protected]>
Subject: Re: [Losmandy_users_io] First clear night to try out my new G11T, I hope!
?
Good luck Jeff!

that is a monster scope, hope it goes well

On Wed, Aug 26, 2020 at 6:09 PM jeff marston <jeffmarston@...> wrote:


I am all set up and ready to go. For the last week, fires in California and Utah have made seeing anything an exercise in futility.?
Today, the skies have been blue, instead of brown, and the clouds are supposed to be few and far between. If seeing is decent
I hope to get some videos of Jupiter and Saturn. I made two attempts last week and weekend, but even stars directly overhead
were dim. Jupiter looked more like a giant Mars, with huge dust storms. I am hoping tonight will be great viewing and videoing.



--
Brian?



Brian Valente
portfolio

Moderated Re: First clear night to try out my new G11T, I hope!

 

Wow.? Great setup.? I'm not used to seeing a Titan RA axis.??

A few things to?consider:

Be sure your knobs holding the tripod sections in place are quite tight.? My C14's weight was slowly collapsing one leg, though I was sure it was tight... and if I had not caught it...yikes.??

You are in a grassy area.? Be sure your tipod feet are on solid?ground, like large flagstones.??

If using an EdgeHD be aware the back focus is ideally 5.75 inches past the rear lens.? There is not much room for a filter wheel or ADC optic.? If you try to extend your camera focal plane out past that, you can end up with a coma problem.? The normal SCTs don't have this particular focal plane issue.? But (Newtonians with) a Baader MPC also have the similar back focus constraint (that one is 55mm).? ?The penalties of "coma free" can come at a price.??

(Where are you located? You hinted at Utah, but....)

Have fun!

Michael

On Wed, Aug 26, 2020, 6:09 PM jeff marston <jeffmarston@...> wrote:


I am all set up and ready to go. For the last week, fires in California and Utah have made seeing anything an exercise in futility.?
Today, the skies have been blue, instead of brown, and the clouds are supposed to be few and far between. If seeing is decent
I hope to get some videos of Jupiter and Saturn. I made two attempts last week and weekend, but even stars directly overhead
were dim. Jupiter looked more like a giant Mars, with huge dust storms. I am hoping tonight will be great viewing and videoing.

Moderated Re: First clear night to try out my new G11T, I hope!

 

Good luck Jeff!

that is a monster scope, hope it goes well

On Wed, Aug 26, 2020 at 6:09 PM jeff marston <jeffmarston@...> wrote:


I am all set up and ready to go. For the last week, fires in California and Utah have made seeing anything an exercise in futility.?
Today, the skies have been blue, instead of brown, and the clouds are supposed to be few and far between. If seeing is decent
I hope to get some videos of Jupiter and Saturn. I made two attempts last week and weekend, but even stars directly overhead
were dim. Jupiter looked more like a giant Mars, with huge dust storms. I am hoping tonight will be great viewing and videoing.



--
Brian?



Brian Valente
portfolio

Moderated First clear night to try out my new G11T, I hope!

 



I am all set up and ready to go. For the last week, fires in California and Utah have made seeing anything an exercise in futility.?
Today, the skies have been blue, instead of brown, and the clouds are supposed to be few and far between. If seeing is decent
I hope to get some videos of Jupiter and Saturn. I made two attempts last week and weekend, but even stars directly overhead
were dim. Jupiter looked more like a giant Mars, with huge dust storms. I am hoping tonight will be great viewing and videoing.
worm turn with MUCH difficulty

 

I recently took my G11 out of storage after a few years of moving around. I found that the connector at the RA stepping motor was broken and decided to upgrade to a Gemini 2 goto servo system. After removing the motors, I am finding both worms do not turn freely but with very much difficulty. Before installing new servos, should some maintenance be preformed. My thoughts are it has sat too long without use. I was considering the service from Losmandy but it may take a while with the amount of back orders.
Any suggestions would be welcomed.
Thanks,
Tom
Re: cable din 4 pin

 

Thanks Paul. Clarified the question.

Luis
Re: cable din 4 pin

 

Hi Luis,

You can't use Gemini power for your ST-8XE. The camera requires a number of voltages that are not available at the Gemini power connector, such as +12v and -12v, as well as +5v and a ground. Gemini only supplies +12 and ground.


Regards,

? ? -Paul


On Wed, Aug 26, 2020 at 06:52 PM, Luis Barneo wrote:
No. My question is not about autoguider connections, is about the electrical power supply. The box has two power connections. One "in", for electrical power supply of 12 V to the box. Next to it there is the "out" connection to supply power to devices. ST-8XE connect through a cable din 5 pins. The true question is if a male cable din 4 pin can fit in a female din? of 5 pins.

Luis
Re: cable din 4 pin

 

No. My question is not about autoguider connections, is about the electrical power supply. The box has two power connections. One "in", for electrical power supply of 12 V to the box. Next to it there is the "out" connection to supply power to devices. ST-8XE connect through a cable din 5 pins. The true question is if a male cable din 4 pin can fit in a female din? of 5 pins.

Luis
Re: Gear lash adjustments on my G11t

 

I have certainly had mounts with far more play than what I have now on my C11T. I have only recently gotten into autoguiding. Since I have been using my SCT’s with long focal length, even with a reducer, any
kind of wind, vibration, or mount instability, has a big impact of guiding. I even try to keep positive thoughts in my head just in case that could mess with my round stars. I appreciate your feedback, Henk. I really?
know how well my mount performs, for photography, until the moon goes away, the fires in the western United States die down, and I get a chance to go to my favorite dark site. Have a great week, Henk.

Jeff
Re: cable din 4 pin

 

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The guider port has six pins, Pin 1 isn’t connected, Pin 2 is common.

?

I assume you want to connect the camera as a guide camera?? In which case the guider port is the one you want to use.

?

Be aware of the warnings in the manual (section 8.6) about the voltage level differences between the early G1 (with RJ45 motor ports) and the later ones with DIN motor ports.

?

David

From: [email protected] [mailto:[email protected]] On Behalf Of Luis Barneo
Sent: 26 August 2020 20:59
To: [email protected]
Subject: [Losmandy_users_io] cable din 4 pin

?

Is it possible to connect SBIG ST-8XE? directly to outside port of the box? Gemini 1 throuht a cable din 4 pin or 5 pin? The inside power of the camera has 5 pins, the outside port of the Gemini has 4 pins.
Luis

cable din 4 pin

 

Is it possible to connect SBIG ST-8XE? directly to outside port of the box? Gemini 1 throuht a cable din 4 pin or 5 pin? The inside power of the camera has 5 pins, the outside port of the Gemini has 4 pins.
Luis
Re: simple servo motor control

 

JoAnn,

Hi. There is a nice video on using Arduino to control a dc motor+encoder. Since you don't need acceleration and position control all you need is to control speed that makes it pretty simple to do.



To use your existing you'd need to couple the Arduino with a motor driver board as shown in the video, which is pretty cheap on Ebay. Add software and a case.

There are Arduino libraries for speed/position control and multiple project pages such as:



I've worked with encoders but purely to build a tester for them using the (leading or trailing edge) Capture function of raw PICs (I don't Arduino myself being old fashioned). A lot of my friends with other brand mounts have had motor/encoder problems I got tired ad hoc testing of them. So I built a test rig. Gave me an excuse to work with encoders.

I suspect the Arduino community is probably a better place to ask than this gang, by the way. Google is your friend. That is how I found these two links.

I do have a couple of the older Hurst unipolar (not what I think you want) steppers used in the old 492 Digital Drive (non-goto). But then you'd have to rip out your existing motor and gearbox. You're idea of using the Arduino (with a motor driver circuit? - cheap on Ebay, see the video and project pages), keeping your existing motor and gearbox, is the smart way to go if you can deal with the code.

Regards,
Mark Christensen
Re: simple servo motor control

 

update: I have found an original stepper motor from a group member. Thanks!?
Re: Restarting Gemini2

 

Hi Ron.??

I think you have the concepts.??

Another useful thing is: you can work on testing this in the daytime.??

Keep your scope and finder scopes optics fronts covered up so the sunlight won't overheat anything and you won't by accident get blinded.? Then just do your GoTos pointing at the sun, as if you were doing solar imaging.

Then you can practice Park and Unpark to your heart's content, while you are not operating in the dark!

Once you confirm you can Park at horizontal, and successfully unpark and repoint at the sun, you should be?good to go for nighttime operation.? ?

I think you can set your preferred Park at Custom orientation, set that as horizontal, and using Gemini.net you can always just park there.? (I just have never tried this myself.)

Very best,
Michael

On Tue, Aug 25, 2020, 8:10 PM Rappnron via <Rappnron=[email protected]> wrote:
Hi Michael
This is exactly the flow I thought that I needed to take
thanks so much for confirming:

Power up first then
power up Gemini2 in horizontal parked position , Unpark , goto, align (or synch ?)? on hand control, then repeat addition same obj goto align ( or synch ? ) on Gemini.net

but unfortunately this is the reason I posted the question because Its not yet worked out for me
but now I know that its gotta be operator error? ... working on it

Thanks again
Ron

Re: No meridian flip while tracking?

 

I am getting reliable meridian flips with my Titan and Gemini 2.? I use Maxim DL, but with ACP.? ACP is controlling the flip in my case.? I have never tried imaging with Maxim stand alone, so can't help you there.

Michel
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