Kevin Ross replied to the topic 'Synscan coordinates differ from those of the solver' in the forum. 1 week ago

kecsap wrote:

kross wrote: Your change was near identical to what I tried. Same result, too. Dec gets updated fine, but RA either has some really weird offset, or doesn't update at all. :(

Maybe Frank will have better luck with his mount.


There are two things in the Sync() function: position reset and the actual sync command. Can you do a quick check what happens if you remove the position reset command? Does it fix the situation? As I remember, the position reset was not there originally before my refactor, but it was needed for Alt/Az mounts to work properly. It is possible that it is unnecessary for EQ mounts.


I tried it both ways, with and without that extra bit, with no difference. I made a video showing the behavior.

www.youtube.com/watch?v=xKHfax03SZ4

Sorry, the equatorial grid lines in KStars don't show up unless you watch it in 4K mode. But trust me, the lines are there. :)

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Kevin Ross replied to the topic 'Synscan coordinates differ from those of the solver' in the forum. 1 week ago

Your change was near identical to what I tried. Same result, too. Dec gets updated fine, but RA either has some really weird offset, or doesn't update at all. :(

Maybe Frank will have better luck with his mount.

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Kevin Ross replied to the topic 'Synscan coordinates differ from those of the solver' in the forum. 2 weeks ago

I played with this some over the weekend. I changed the code so it sends RA/Dec instead of Alt/Az. The Dec axis gets updated just fine, but the RA axis wouldn't update. Not sure what's going on. I will have to mess with it some more.

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Kevin Ross replied to the topic 'Synscan coordinates differ from those of the solver' in the forum. 2 weeks ago

Well I think that most people use EQMod instead of Synscan driver. I'm one of the few weird ones that use Synscan instead. I haven't run into the problem myself because I haven't tried using the solver.

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Kevin Ross replied to the topic 'Synscan coordinates differ from those of the solver' in the forum. 2 weeks ago

Had a quick look at the code. In the Sync function, it looks like you're converting the RA/Dec into Alt/Az. In reading the Synscan Serial Communication Protocol PDF, it looks to me like they want RA/Dec for EQ mounts, or Alt/Az for Alt/Az mounts, whereas you're always converting to Alt/Az. That could be the source of the problem.

I don't have my mount setup right now, or I'd make the change and test it out. I won't have it set up until Sunday at the soonest.

-- Kevin

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Kevin Ross replied to the topic 'Canon DSLR Off By One Images - Very Dangerous!' in the forum. 1 month ago

I'd recommend filing a bug report, so it doesn't get forgotten about.

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Kevin Ross replied to the topic 'Canon DSLR Off By One Images - Very Dangerous!' in the forum. 1 month ago

I just tried your experiment, and unfortunately, that problem remains. Since my camera doesn't have a touchscreen, it hasn't been a problem for me, so I only tested my own issues. :)

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Kevin Ross replied to the topic 'Canon DSLR Off By One Images - Very Dangerous!' in the forum. 1 month ago

Okay I've had some time today to do some testing, with the camera on the bench instead of outside hooked up to a telescope.

With the old version, I could queue up many images in the camera by aborting a capture. And how ever many times I aborted, that's how many images it would be behind.

With the new version, all is happy! The camera even shuts down properly now.

Thanks for all your hard work!
-- Kevin

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Kevin Ross replied to the topic 'Canon DSLR Off By One Images - Very Dangerous!' in the forum. 1 month ago

Awesome!
BTW, I'm the one that submitted the bug fix for the SynScan driver. I'm brand new to INDI/Ekos/KStars, but I really like the distributed nature of it. Just because the first time using it, it doesn't work, and had to pull out the source code editor and fix it myself, I don't let that slow me down! :)
-- Kevin

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Kevin Ross replied to the topic 'Canon DSLR Off By One Images - Very Dangerous!' in the forum. 1 month ago

I've been severly bitten by this bug, where I wouldn't be getting back the photos that I think I should. Like I'll point the scope at the moon, take a preview snapshot, and it gives me a picture of what I was looking at before!

I think any time you stop/abort a capture, it leaves the image in the queue on the camera, so next time you take a picture, it returns the queued up photo. And it seems to stack up. I suspect that would be the reason the camera sometimes won't power down properly, the number of photos that it says it is trying to write might be the number of frames behind gphoto is from downloading from the camera.

I will do some more testing tomorrow, now that I have an idea of what causes this.

-- Kevin

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