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Re: Nextstar 8se & a G8 - need help with dovetail

 

Jon, after Celestron and Losmandy developed the G11 introduced in April 1992 (just in case any one wondered where the "492" came from) they announced the G9 model, a C9.25 on a modified GM-8. The mods were using a G11 saddle and an inadequate copy of a Vixen AL110 tripod that first served as the CG-5 tripod. The Tripod was complete with the CG-5 hub that had been drilled for a Lomandy made adapter. I noticed that there were some extra threaded holes in the adapter which lead to this discovery.

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As far I can determine the HD Field Tripod was never offered as an?option with the G9.


Re: In search of 492 systems for G11 and GM8

 

PM me, I have a complete system for either the G11 or GM8.

Of course this $20 OnStep controller can do anything?that the 492 can plus wireless control with your cell phone or wired with a basic 492 hand unit or Smart Hand controller. Autoguiding, RTC, etc. supported.

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Re: Nextstar 8se & a G8 - need help with dovetail

 

This is what your looking for. This mount was originally DDS492 and had a 3" saddle. I had Losmangy send me the dual saddle and converted the drive system to OnStep. Fooling with the motor cabling here. It has the ESP32S based MaxESP3 controller mounted in the aluminum enclosure.
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Re: Nextstar 8se & a G8 - need help with dovetail

 

oh, I had no idea such a “mini losmandy” standard existed, good to know. My older GM8, from ca 1997 came with the “large” losmandy clamp and that’s the extent of my knowledge :)
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thanks for the info


Re: Nextstar 8se & a G8 - need help with dovetail

 

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Jonathan,
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There was a middle sized Losmandy dovetail, wider than the narrow Vixen which became the small standard but narrower than the Losmandy D which became the wider standard.? I have one of these original GM8s mounts which came with the wider small saddle clamp.? Trust me nothing fits it except for the Losmandy middle size dovetails.? ??
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--

Chip Louie Chief Daydreamer Imagination Hardware?

Astrospheric Forecast - South Pasadena, CA?


Re: In search of 492 systems for G11 and GM8

 

I have a G11 version of the 492, motors and all.
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Let me know if you're interested.
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MJCW500@...


In search of 492 systems for G11 and GM8

 

I really prefer using the 492 system in conjunction with the DSC Pro but I've got a G11 and a GM-8 with Genesis I systems that I'd really like to convert over to the 492 system on each. I'd need the whole shootin' match - including motors.?
I may end up placing a wanted ad on CloudyNights but figure most everybody here already reads those posts and I feel safer here.
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Please let me know whatcha got!
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Warren
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Re: Nextstar 8se & a G8 - need help with dovetail

 

Hi Pete, welcome to the group.
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I’m not sure what vintage your mount is but, it very likely accepts Losmandy style dovetail plates only. The one on your scope seems to be Vixen style and will not work on the mount as is. The best way to use your C8 on the GM8 is to get a C8 specific dovetail plate with its associated radius blocks. Losmandy sells those on their ?website.
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Like Chip mentions, you could also upgrade the base on your mount to the newer version which accepts both Losmandy and Vixen plates but, imo Losmandy’s bigger sized plates offer better stability and stiffness. However, if you have other, smaller scopes with the Vixen plates, this option may be more versatile. That base is also sold on Losmandy’s website ;)


Re: Nextstar 8se & a G8 - need help with dovetail

 

On Tue, Oct 15, 2024 at 05:35 PM, PeteL wrote:
Hi All,
I'm a recent joiner here. I was fortunate to purchase a well taken care of G8 with an extension between the tripod and head. It’s has the 492(?) drive system.?

I have been using a 4.25” Orion Newtonian and a GoTo Celestron 8se with the computerized single arm mount.?
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I’d love to fit the 8se onto the Losmandy. But the dovetail bar on the ota is about an inch narrower then the mount accepts.?

I also received a dovetail plate with the mount that I’m hoping to find specs for. Maybe I could attach the Celestron bar to this unknown one which fits perfectly on the G8 mount. But who knows just yet.
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Thank you for any suggestions anyone may have.?
pete
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That is an old GM8s!? ?I bought one just like it a few years ago!? ?That is the original as in proprietary "Small" Losmandy dovetail.? To allow your GM8s to use the now standardized dovetails you need to replace the saddle on the GM8s mount.? I recommend buying a , also known as the 4" dual D/V saddle mount, this is what I am using.?
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--

Chip Louie Chief Daydreamer Imagination Hardware?

Astrospheric Forecast - South Pasadena, CA?


Nextstar 8se & a G8 - need help with dovetail

 

Hi All,
I'm a recent joiner here. I was fortunate to purchase a well taken care of G8 with an extension between the tripod and head. It’s has the 492(?) drive system.?

I have been using a 4.25” Orion Newtonian and a GoTo Celestron 8se with the computerized single arm mount.?
?
I’d love to fit the 8se onto the Losmandy. But the dovetail bar on the ota is about an inch narrower then the mount accepts.?

I also received a dovetail plate with the mount that I’m hoping to find specs for. Maybe I could attach the Celestron bar to this unknown one which fits perfectly on the G8 mount. But who knows just yet.
?
Thank you for any suggestions anyone may have.?
pete
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Re: Comet Tsuchinshan-ATLAS C/2023 A3 in the Northern Hemisphere

 

Thanks and there is also a good C/2023 night sky map you can tailor for your location and date/time at
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Also COBS is showing the magnitude seems to be increasing so it may have survived the trip around the Sun
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Good viewing here on the 18th so maybe some images then.
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Good luck,
Ken


Re: titan mount

 

hi paul, many thanks for your speedy and detailed reply. i can breath easy knowing that i havent damaged the mount. your help was much appreciated. regards peter.


Re: titan mount

 

On Wed, Oct 9, 2024 at 11:21 PM, Peter Betts wrote:
hello to the group, being a new comer to the titan mount i was wondering if i can nudge the scope by hand when RAandDEC locks are on. would i be doing damage with a slight nudge to manualy center an object? many thanks.
Hi Peter, welcome to the group!
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The mount is configured with slip-disk clutches intended specifically for such a push-to, manual operation. You're not going to hurt the mount, just don't crank down on the clutches with all your might as the tighter you make them, the more friction there is between the axis and the worm-wheel, and that makes it harder for the clutches to slip.
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If you use a Gemini controller, you can use the hand controller buttons to do all the nudging and that is much more precise and easy to position the mount, especially at higher resolutions and with more weight on the mount. If you do use Gemini for Goto's, then manually pushing the mount will, unfortunately, result in Gemini losing track of where in the sky you're pointing to. This is because Gemini uses motor encoders rather than axis encoders. This means if the axis is shifted by hand, without the motor, Gemini will not be aware of this position change. If you do this accidentally, you can re-sync Gemini on a known bright star so that it knows where it is pointing to. But constantly mixing push-to and motor-based nudging is not recommended. Use one or the other, consistently, and you'll be fine.
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Regards,
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? ?-Paul
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titan mount

 

hello to the group, being a new comer to the titan mount i was wondering if i can nudge the scope by hand when RAandDEC locks are on. would i be doing damage with a slight nudge to manualy center an object? many thanks.


Comet Tsuchinshan-ATLAS C/2023 A3 in the Northern Hemisphere

 

Folks,
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Comet C/2023 A3 is set to make a spectacular appearance in the Northern Hemisphere in the next few weeks:

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It'll pass near M5 globular cluster on October 15 if you want to try to capture both in a wide-angle view.
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If you use the ASCOM driver with your Gemini L6, you can locate and track the comet using Func->Small and Solar System Objects by entering C/2023 A3:
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Or use a planetarium software to find it. Detailed orbit elements are also available from JPL:
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Re: Dec and RA Motor issues

 
Edited

On Sun, Oct 6, 2024 at 06:58 PM, don murad wrote:
Just with in the last 3 weeks, I have issues with the G11 RA and Dec motors (I think).? Even if the hand control is set to slew, both motors move the telescope very slow. The
mount was powered with 110 v
I use an Asiair to control the scope so initial I thought that might be where the problem was (Don't know why but I though I would check). Disconnecting the AIR did not solve the problem.? The G11 was purchased 9 years ago and has worked perfectly up until now. I don't know where to start. Any suggestions ?
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Thanks
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I am hoping you meant that the Gemini 2 is using a small 12V-16V power brick plugged into utility power.??
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First, have you replaced the battery in less than 6 months? ?If not get your tools and Digital Multi-Meter (DMM) out and verify the battery is reading at least 3.0V. ?If it is not at least 3.0V replace the battery with a fresh - name brand - coin cell and immediately manually set, save the time and.reboot the Gemini 2.? There is a technical reason for this that has to do with the processors having a small design issue that this routine resolves until the battery is replaced again.
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If your battery was good and/or after a battery reboot is done if you are not intimately familiar with the Gemini 2 internal settings the easist way to clear out corrupted settings and hidden data that frequently cause issues like this is to do a Reset to HGM values. This will reset almost all settings and set the Gemini 2 internal settings to a known working condition. ?Do this AFTER you read and understand the following.?
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When do you have a problem with the movement speed of the mount?? Look at the speed settings on the HC and in the ASIAIR app, the mount speed is meant to be dynamic, in some situations you want the mount to move slowly and others faster.?
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The Gemini HC top menu has the SPEED button which is used to step through the speeds available in whatever MODE the mount is in.? The MODE is set by the HC > MODE button and button behaviour is set by the HC > BUTTONS button.?
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For the ASIAIR movement speed it settable on the pull out GOTO side menu. Look for the SPEED lable and the vague slider with a number above the slider on the left side of the pull out menu. Use a finger to slide the speed up or down.?
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Hopefully this resolves the mystery.? But if this is not the problem let us know.?
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--

Chip Louie Chief Daydreamer Imagination Hardware?

Astrospheric Forecast - South Pasadena, CA?


Re: Dec and RA Motor issues

 

By 110, I assume you mean the AC adapter.
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Speed wise, you need to use the mount hand controller to set up slew and move speeds. By default, mine was also very slow.
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Re: Dec and RA Motor issues

 

Sounds like system is set to photo or visual mode. ?Not all speeds. ?

Also check the the mount and gear ratios are set ok. ?You need to inspect all settings or reset it to factory and do your settings again, Aka mount type, location, time zone etc.?

Just a question does it run a sidereal ….aka follow a star?
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cheers
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brrn
--
Brendan


Re: Dec and RA Motor issues

 

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Don,

110V is well outside the recommended power range, which I think from memory is between 12V and 18V.

I would first check that the correct voltage is holding up when slewing as this can be a problem.

In addition there is a setting that determines the slewing speed, if this has been set slower, unintentionally, it would slow the slewing speed.

Paul




On 7 Oct 2024, at 1:09:44 pm, don murad <dmurad53@...> wrote:

[Edited Message Follows]

Just with in the last 3 weeks, I have issues with the G11 RA and Dec motors (I think).? Even if the hand control is set to slew, both motors move the telescope very slow. The
mount was powered with 110 v
I use an Asiair to control the scope so initial I thought that might be where the problem was (Don't know why but I though I would check). Disconnecting the AIR did not solve the problem.? The G11 was purchased 9 years ago and has worked perfectly up until now. I don't know where to start. Any suggestions ?
?
Thanks


Re: Dec and RA Motor issues

 

Don,
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Have you checked the speed settings in the Advanced Gemini Settings? I have mine set to around 1/2 the default setting to give me extra time to view mount movements with my remote security camera lag.
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John?
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Losmandy G11G2 on pier; refurbed Losmandy G11 with OnStep controller; SkyShed design roll-off observatory; ZWO ASI2600MM-P; ZWO ASI071MC; Sky-Watcher Esprit 100 ED with field flattener; Celestron C925 Edge HD with 0.7XFR, William Optics Zenithstar 61 APO; PHD2, NINA, Sequence Generator Pro and PixInsight user