Michał Mosdorf
19 posts


The big scope is ready to go! This night, I will give the @zwoasi 2600 MC an actual planned and prepared first light. The focus motor is also on there, with my custom adapter.
Really excited about the next two nights of #Astrophotography!

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M81 captured with RC6 and ASI533 from Warsaw. 27h on L-pro and 16 on L-extreme. #Astrophotography

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@astro_addict Check this thread: astropolis.pl/topic/77875-rc… it is in Polish but you will be able to easily translate most important answers.
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@astro_addict Alternatively use Astrometry. Based on that you will see what is the delta to nominal FL in mm. Now you will have to adjust this by changing the distance between primary and secondary mirror. This is done by screwing central screw on the secondary mirror.
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@Butzzze What you are seeing is probably related to stiction. In my case meshing of the geers was soo tight that belt was streathing too much while trying to correct the Dec backlash.
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@Butzzze I would suggest that you loosen the Dec gear meshing. Also try the unidirectional Dec guiding. This is the approach that helped a lot in my case with cem26.
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@Butzzze Hi how did you manage to solve dec backlash? I have similar problems that you had.
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@Butzzze I have seen this issue mentioned on cloudy nights. In my case I have used the mount ony for 2h so still too early to have any conclusion.
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@spockm But what is bugging me extremely: After several smooth hours the RA axis suddenly begins to stop rotating for a few seconds. I can hear how the steppers stop buzzing and after 5-10 seconds everything is good again. Super annoying!
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@Butzzze Did you talk with ioptron about that? I home I will continue testing today.
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@spockm I tried the gear meshing but it was not successful. Maybe you have more luck.
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@Butzzze Thanks. I will probably try gear meshing. I must say it is quite worrying that Dec guiding is soo bad in auto mode.
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@Butzzze How did you reduce dec backlash? I am heaving similar issues witm cem26.
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03-14-2021 - Strasbourg datacentre
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