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Old 07-02-2024, 09:59 PM
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Marked the north-south line from a shadow off a level at solar noon the other day. I confirmed it again today.

I then lined up my pier with that north south line and the mounting holes for the PME mount. This was from advice by Paul Haese - thanks Paul!

I then levelled using metal washers as packers. Then I installed 6 x 10mm x 50mm anchor bolts into the slab and the pier.

Then I put grout under the bottom of the pier where it had minor gaps.

Then installed the PME now with the saddle in the correct orientation fixed on the mount.

Then reinstalled the scope and camera etc. Then gave it a bit of test run in the daylight and it all looks good ready for a polar alignment tweak then start imaging.

Cloudy though of course but I am happy everything is ready to go next clear night.

Greg.
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  #122  
Old 08-02-2024, 04:10 PM
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[ATTACH][ATTACH]
Quote:
314514
[/ATTACH][/ATTACH]I finally installed an extra primary mirror baffle Astro-Physics sent me about 2-3 years ago or longer. Meant to suppress reflection arcs from bright out of field stars. I virtually never saw this anyway but it's an upgrade so I installed it.

I then gave the optics and mirrors a clean.

Put it all back together and on the mount ready to go.

Hopefully the current clear skies last to the night!

Greg.
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  #123  
Old 08-02-2024, 09:35 PM
Startrek (Martin)
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Greg,
Congratulations on the new Obs
Well done !!
Is that 12Ē f3 / f4 or a 10Ē f3 / f4 ?
Looks great what ever it is

Yeh I used the solar noon shadow method as well to scribe my True N/S line on my deck prior to building my NexDome on it.
Luckily I was only a degree or two out so I didnít need to move the Azimuth too much for polar alignment. All my concrete piers lined up spot on too for the EQ8 pier tripod legs and feet , whooosh. It paid dividends to quadruple check things months and months prior to final install

I bet your pumped at the moment with the new set up and canít wait to get your teeth into some imaging !!

Clear Skies
Martin
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  #124  
Old 09-02-2024, 08:54 AM
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Greg,
Congratulations on the new Obs
Well done !!
Is that 12Ē f3 / f4 or a 10Ē f3 / f4 ?
Looks great what ever it is

Yeh I used the solar noon shadow method as well to scribe my True N/S line on my deck prior to building my NexDome on it.
Luckily I was only a degree or two out so I didnít need to move the Azimuth too much for polar alignment. All my concrete piers lined up spot on too for the EQ8 pier tripod legs and feet , whooosh. It paid dividends to quadruple check things months and months prior to final install

I bet your pumped at the moment with the new set up and canít wait to get your teeth into some imaging !!

Clear Skies
Martin
The scope is an AstroPhysics Riccardi Honders astrograph. Its 305mm aperture and F3.8. The mirrors are fixed it never needs collimation - a big plus.

The tube is 14 inches and is oversized I think to help eliminate tube currents. It has a wetsuit type materials thermal blanket around the main body and dewshield. It holds focus reasonably well with a small shift with termperature.

I have a FLI Atlas focuser on it which is very good and needed as the critical focus zone is very small.

I did a T Point run last night to improve polar alignment but autoguiding showed one axis to be off. Then clouds rolled in. I am close to imaging with it.

I like the fact that the roll off roof is rather quiet and moves with hand pressure. The observatory is close to the fence with one of my neighbours.
I closed it up last night at 12:45am so that is important.

Greg.
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  #125  
Old 09-02-2024, 10:11 AM
Startrek (Martin)
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Greg,
Gee thatís a quality bit of kit in your Obs
I believe those Honders came out around 2009 / 2010 and sold in Oz for around $20K ??
The minister of finance wouldnít approve those sort of funds in retirement to splurge on a rig so I have to be content with my humble gear.

Monday and Tuesday night are looking good at this stage

Hope you get some sky time

Cheers
Martin
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  #126  
Old 09-02-2024, 01:59 PM
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strongmanmike (Michael)
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Quote:
Originally Posted by gregbradley View Post
[ATTACH][ATTACH][/ATTACH][/ATTACH]I finally installed an extra primary mirror baffle Astro-Physics sent me about 2-3 years ago or longer. Meant to suppress reflection arcs from bright out of field stars. I virtually never saw this anyway but it's an upgrade so I installed it.

I then gave the optics and mirrors a clean.

Put it all back together and on the mount ready to go.

Hopefully the current clear skies last to the night!

Greg.
Please stop posting astro porn like this Greg, disgustipating

Mike
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  #127  
Old 09-02-2024, 04:52 PM
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Please stop posting astro porn like this Greg, disgustipating

Mike
Hehehe
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  #128  
Old 09-02-2024, 10:38 PM
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Managed to do 2 shortish TPoint models tonight through the clouds that were rolling in. I got a decent polar alignment and brief autoguiding showed low errors.

It's supposed to be clear on Sunday and Monday night.

Greg.
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  #129  
Old 13-02-2024, 09:11 AM
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2 clear nights and started imaging. All going well and then the autoguider starting getting time out and device not detected messages.
Checked the cable again and it was fine. Swapped out the autoguider with a new one I have and it worked fine.

Later it seemed the problem was too large a shift in dithering. I backed it off and the guiding was stable.

Just another thing to get right to make the system stable. I got about 4 -5 hours of images from each night.

Greg.
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  #130  
Old 14-02-2024, 10:30 AM
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Congratulations Greg it looks great!
Looking forward to seeing the first images from it.
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  #131  
Old 15-02-2024, 10:54 PM
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Would be good to know what sliding gate track and wheels you used from Bunnings please Greg. Were they metal roller wheels that you find smooth and quiet, or rubber coated in some way? Agree every little noise in wee hours of the morning makes you feel guilty when neighbours are close by.
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