maxmirot
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Posts posted by maxmirot
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http://forum.astrosysteme.com/index.php?/topic/1013-very-old-autoslew-manual/
If you look at the very old manual there is some driver information. The basic commands are from ACL , Astronomy Command Language used on professional systems.
Max
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I am surprised no one in has reverse engineered MLPT yet. I think it could be handled as offset tracking rate minute by like a comet ephemeris.
1) Collect data for the imaged object and its path through the sky as sequence does using automation + plate solving.
2) Calculate the positional difference for each point in the exposure.
3) Plot these differences-use a function to smooth the path deltas.
4) Calculate the minute by minute ( or 30 sec) the offset tracking rate for RA and DEC.
5) Create a comet/satellite - ephemeris table - Load this to data scope.
Scope now tracks exposure with corrected tracking rates.
I think it might cover the basic concept.
This could all be done outside of Autoslew and sequence.
I don't know if a comet ephemeris can automatic loaded into autoslew.
Off course, it just a thought.
Max
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Nigil,
Sure they can be a problem. I usually can reject them as long as I have 7 or more images.
Max
Purely as a matter of interest, with exposures as long as 20 minutes, what proportion are affected by things like aircraft, satellites, etc? There must be a point at which it is more efficient to do more shorter exposures.
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"The MBTF is now over 90%"
I am not sure what this means.
I wish they would continue development of Sequence or allow all features of the mount including MPLT to be accessed by other software.
Max
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Kstars and Ekos looks very cool from the web pages.
It would be nice to run all device in Linux on Rasberry PI. There just too many devices out there that are not yet supported by INDI including my dome, and the ASA mount.
I guess FLI and other drivers need to be ASCOM for Windows to work. Perhaps in few years we will see more drivers.
They really have quite a few drivers already.
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I like trying new software. I will look at Kstars. The big question is there a driver for everything we own. Does the ASA mount have a Lunux driver?
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Why would even want to do this? Seem like an extra headache with little benefit.
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This bug is fixed download the last Autoslew.
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I just did some tests so far. I want to try more without MLPT using SGP. I reserve test for moon up time. So more from me in few weeks.
SGP needs to implement RBI from my SBIG camera before I try real runs with this.
Btw, ASA recommend a new pointing model. I don't know why old data would be different from a software perspective.
I love to here more results from others.
Max
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See my post in the beta section. There was a error in flexure calculation which was identified and is now flexed.
It requires new autopoint data. I doubled my unguided performance to 20 min without MLPT from 10 min.
Max
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Current recommendation is to go into advance pointing uncheck the the use / optimize for east flexure , west flexure and mount pier flip.
Then let super fit do its thing.
Max
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Any news from ASA wheather this bug is resolved or not?
This problem with RA residual error and much smaller error in DEC I have had for 2 years! Since this is independent of mount position it doesnt make sense (to me) that it's a mechanical problem.
So even an admittance that it IS a bug is good news to me. Now I hope for a fix as well.
pelle
Me too email ASA. I am waiting too.
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I sent my autopoint files to ASA.
I had been asking why on the forum why there is such residual error spread along the RA axis only.
Apparently, tehy found that the flexure calculation is wrong.
A new Autoslew version should fix this shortly.
I see they just posted Version X.40 hopefully it has the fix.
I don't how much this actually effected tracking and pointing.
Max
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If balance is perfect then it may be that you have the dreaded 'rising current' problem.
My mount had this and had to go back to Austria. I never got a definitive answer to what caused the problem, but it was most likely due to a tight bearing on the DEC axis.
ASA put new bearings in and the problem was fixed.
The rising current problem was more common on DDM60 mounts, so I am surprised you have it on a DD
Something is weird with the mount.
It has problems. I have played with balance for hours , it looks good, then tracking acts ups.
Actually It got Dec balance perfect at 2.2 amp scale. That's perfect at all ALT and AZ positions.
I could never get RA to balance as well. It would be several bars out at bellow 25 degrees E and W.
At 45 degrees E and W it would be excellent , less than a bar.
I using a radial offset weight to get Dec perfect.
RA should be easy to get perfect in all position, I think.
But it never is.
The current should not ramp up from .5 amps to 2.0 in either axis. Eventually tracking gets flaky. I see it go bad more in RA the Dec. The is like because that most driven element.
Perhaps there is some adjustments but I kind of expect it to go back to Austria. Martin emailed me to do a Skype- team viewer session.
Max
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Dec Balance was perfect.
All sky positions at 2.2 amp scale.
I am estimating about 35 kg payload
Max
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What are you talking about?
Max
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What is happening? This does not look ok.
Max
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What settings are you using for autoslew and PHD2 ? I have problems with SGP guiding.
Max
Prism
in Software
Posted
I don't have any expertise either.
ASA may have preserved the basic driver commands from ACL.
Extra commands that are for encoders, direct drive motor start up and tuning, loading pointing models and MLPT are going to be proprietary.
It might be a clue if you can separate out the basics when looking at the USB traffic.