maxmirot
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Posts posted by maxmirot
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I started using Sequence with MLPT imaging the last few nights. ( I still prefer SGP.)
However, I am getting round stars on most 20mins images using MLPT. A recent 180 star model still shows the same pattern. Much bigger errors spread out along the RA
Everything is rock solid from the foot of the pier, focuser, scope. The source of hysteresis is not obvious.
The increased RA error should be a clue.
Max
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Let us know what happens. I am going back to guiding
Max
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Great work. I am about to putting together the same object with the same filters. Getting the most out of the data is very tricky.
Just curious what medical specialty are you in ? I am a pathologist.
Max
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I can not see how this the focuser.
I am using the Optec Gemini it supports 10kg and is very made very well.
Perhaps I am can detect movement in the focuser using a dial indicator.
What version of autoslew are you using?
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Did you fix this problem? Could it be an autoslew bug 5.2.2.3?
Max
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What scope are you using.
Max
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See my thread about RA axis going bad. My RA error is about 8x worst than DEC. It has got worse over the last few weeks. It was 2-3x worse in RA.
I can find nothing loose and I have a extremely rigid scope and focuser. It is an AP Honders and Gemini focuser. ASA is telling me it likely hysteresis. Not likely the mount. I am not convinced. Why would it effect the RA much more?
http://forum.astrosysteme.com/index.php?/topic/861-ddm-ra-axis-going-bad/
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I get an error when trying add my user account with both Firefox and edge. Page hangs on firefox and edge gives a 500 error.
I used seven letters and lower case for PW.
Max
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Seems we have a lot of complex issues with Windows 10.
I was working with WIN 10 using 5.1.1.9 and everything worked fine.
I updated to the current version of Autoslew and clicked on replacing the USB driver for install. Then I had many USB errors.
I then installed the latest FTDI USB driver from the FTDI website. This fix the communication errors.
Max
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Yes,
I have very great cabling.
Power and USB all comes through the mount. Nothing to drag on the mount or it's bearings.
Max
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Or how about this one. Note the polar aliment and collimation were not adjusted. One this one is over 40 stars the last one over 110 star.
Result should be constant unless the OTA or mount has loose components. Everything is rock solid from the ground up.
Would a loose optical component favor one axis???
I make remove the AP RH OTA and put my TEC a refractor as a experiment.
However, the errors might be only present with a heavier weight OTA.
Max
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Have a look at the errors. That tells me there something wrong.
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Exactly! It should be much easier to do than DEC. It is giving problems and that shows it the pointing data along the RA axis.
Max
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Polar alignment is less than 3 min. (The models that are coming out now vary so much it hard to show that).
I have a radial balance. I null balance using a CW along the tube and a radial CW. When I am done DEC is in balance in all positions.
I can't get RA to balance in all positions. The residual pointing errors show up in RA.
The OTA is an Astrophysics Riccardi Honders 305mm with Optec Gemini focuser-rotator which supports up to 25 lbs.
I checked the scope for loose components. The back of OTA opens for cooling so I was able checked the mirror and rear corrector. It is all rock solid.
The AP OTA is not user adjustable. I am sure they set all optics as firmly possible without pinching them.
Max
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I have not been able to create a user account.
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I don't think where the Wiki is hosted is a major issue.
I can safely say that most of us would like to see commentary from ASA on the content.
A few minutes of Q & A with the engineers a couple times a week that produce the product would most beneficial.
Max
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The errors are spread out along the RA in a non random manor. RA error is about 8-10x greater. Also this over 100+ stars.
This suggests to me something wrong.
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Max,
I didn't look at your file, however there is a remote possibility that the axis is not tracking well due to mechanical reasons, like a defective bearing, a strong hit during operations or transport, and the likes...
This is something you should discuss with ASA support...
RA is bad, this what it looks like to me. Btw. there has been no transport since I got the mount.
RA errors was always a little worst than DEC but this got worse.
I am able to get balance perfect in DEC in all positions using CWs in including radial adjustment. RA is never perfect in all positive.
Please load the the file and tell me what you think.
Max
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I am getting bad errors in RA and this has increased .
https://www.dropbox.com/s/jb4r1oji9g28kha/PointingErrors7.pox?dl=0
Have a look at the autopoint file and tell me what you think.
Thanks
Max
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SPT can run an external script before or after any event in the plan.
I does not have COM scripting yet.
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I take it back.
Bring up the time settings menu for Autoslew with GPS it specifically says " Sync Query during tracking for GPS.
You can input the time interval. default is three minutes.
This strongly suggests the time reference is update by Autoslew from the GPS during an exposure.
Max
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I hope that Autoslew would not allow time to shift rapidly during tracking.
How time updates from GPS or NTP are handled are unknown
No way to tell without asking Dr. Keller.
I am sure it would be helpful have subsecond time accuracy during an exposure for tracking.
Syncing at the start on an exposure or session updates the time offset. After that you are relying on the system or other clock source.
Time drift is not desirable during an exposure.
Max
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Bubble Nebula, HH-170, M52 and more...
in Deepsky
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Nice. Leave some photons for the rest of us Ron.