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INDI Library v1.8.5 Released (19 Apr 2020)

April 2020 release of INDI Library v1.8.5 introduces new drivers while providing fixes and improvements to existing devices and core framework.

Meridian Flip Configuration

3 months 2 weeks ago
sterne-jaeger
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Meridian Flip Configuration #49497

The flip process should also be managed using the Pier Side property when this is available. At present this isn't used, it uses hour angle. As a result there's a lot of scope for confusion where a mount does a flip earlier than expected and the flip process does another one or, worse, the flip process does one too early. The system now thinks that a flip has happened but it hasn't and it tracks into a hard stop.

Good news, folks, we are starting to work on it. It will make the meridian flip more robust - hopefully - but the code complexity will grow again. Since there are mounts that now their pier side, others not, some can be forced into a meridian flip, others not etc.

- Wolfgang

TSA-120 + FSQ-85 + GSO 150/750 | Avalon Linear + M-zero | Moravian G2-8300 + ASI 1600mm pro + ASI 294mc pro | KStars/INDI on Raspberry Pi 4 with Raspbian 10
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3 months 2 weeks ago
sterne-jaeger
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Meridian Flip Configuration #49498

The target is at +0h 2' + and the mount is on the west side pointing east

That's really strange, but maybe it's simply an edge case. Your mount does not take 2 minutes to slew? Or maybe you were not fast enough checking the hour angle?

The question that I always ask in such situations: are you really sure that date, time and location match 100% between the mount and KStars? Is KStars setup in such a way that it propagates its settings to the mount?

If not, that is a typical source for unexpected behaviour.

Wolfgang

TSA-120 + FSQ-85 + GSO 150/750 | Avalon Linear + M-zero | Moravian G2-8300 + ASI 1600mm pro + ASI 294mc pro | KStars/INDI on Raspberry Pi 4 with Raspbian 10

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3 months 2 weeks ago 3 months 2 weeks ago by RDBeck.
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Meridian Flip Configuration #49503
I don't know if the mount has any information not from KStars. I have confirmed that the OS time and KStars observation location times are on the same time zone and consistent with the location. I have also verified the location is correct. Where do I check that KStars propogates to the mount?

I did have to effectively reset the mount model after the initial test. The mount pointed so far from the first target that plate solving was going through several astrometry files trying to find where it was actually pointed. I stopped the plate solving and slewed to a point nearer the NCP which plate solved well. The following slew was also good with the target in the frame (2 deg x 1.5 deg).

I'll do a similar check later today.

Hypertuned NEQ-6Pro, ZWO OAG, ASI 120 min guide camera, SV 80ST, ASI 1600MM Pro, ASI filters and filter wheel, DIY Moonlite-compatible focuser, DIY SQM

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3 months 2 weeks ago
sterne-jaeger
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Meridian Flip Configuration #49508

I don't know if the mount has any information not from KStars.

You can the values in the handset of your mount.

Where do I check that KStars propagates to the mount?


In the INDI settings of KStars:

TSA-120 + FSQ-85 + GSO 150/750 | Avalon Linear + M-zero | Moravian G2-8300 + ASI 1600mm pro + ASI 294mc pro | KStars/INDI on Raspberry Pi 4 with Raspbian 10
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3 months 2 weeks ago
RDBeck
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Meridian Flip Configuration #49519
I had my mount model very screwed up. I think I have it working correctly after going to the defaults, going to park and releasing the RA clutch to get the counterweight bar vertical. Now when the scope slews, it appears to be pointing in the right place plus the hour angle on the Ekos mount tab is consistent with the KStars hour angle.

Hypertuned NEQ-6Pro, ZWO OAG, ASI 120 min guide camera, SV 80ST, ASI 1600MM Pro, ASI filters and filter wheel, DIY Moonlite-compatible focuser, DIY SQM

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3 months 1 week ago
RDBeck
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Meridian Flip Configuration #49878
Here is a follow-up from a more-or-less successful evening.

I was working on M42 and did a solve and slew at HA ~+1minute. The mount was on the west pointing east at the start of the solve and moved to the east side. However, it would only slew to Alnitak or Alnilam at this point in time (consistent with the display in KStars). After playing around on the Horsehead Nebula (not sure how long), I could successfully move to M42.

Any suggestions?

Hypertuned NEQ-6Pro, ZWO OAG, ASI 120 min guide camera, SV 80ST, ASI 1600MM Pro, ASI filters and filter wheel, DIY Moonlite-compatible focuser, DIY SQM

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3 months 1 week ago 3 months 1 week ago by Megiddo.
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Meridian Flip Configuration #49883
Last night while... ahhh making my normal, non-sleeping walk down the hall :whistle: , I checked my phone to see how close I was to a flip. I noticed a nice timer message counting down on the , which I hadn't noticed before.

Later after another trip (yeah, I'm getting old)... I saw in my yard cam that the rig did do the flip. Plus that message said Status: Inactive

My thoughts are, as long as that count-down message is running, it will flip.

Here's the simulator showing the same thing:
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3 months 1 week ago
RDBeck
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Meridian Flip Configuration #49884
I think you missed my point. I didn't call for a switch in direction. I only commanded a solve and slew. I didn't look at the hour angle until after the slew took the mount to the east side.

Hypertuned NEQ-6Pro, ZWO OAG, ASI 120 min guide camera, SV 80ST, ASI 1600MM Pro, ASI filters and filter wheel, DIY Moonlite-compatible focuser, DIY SQM
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3 months 1 week ago
ChrisRowland
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Meridian Flip Configuration #49889
Any slew that is done when the mount prefers to be on the other side of the pier will do a flip.

All that the pier flip process does is wait until the flip condition is reached, then does a slew to the current coordinates.

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3 months 1 week ago
RDBeck
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Meridian Flip Configuration #49899
It's OK that the flip occurred. The issue is it wouldn't then go to the target (M42). The actual (not the desired) behavior was replicated in KStars. I would think that if the logic says we need to flip that it would then go to the target, not just somewhere close.

The capture and slew and, if I recall correctly, a load and slew did not go to M42 at that point in time. Several minutes later (didn't make note of the actual hour angle), it finally would go to the target.

Hypertuned NEQ-6Pro, ZWO OAG, ASI 120 min guide camera, SV 80ST, ASI 1600MM Pro, ASI filters and filter wheel, DIY Moonlite-compatible focuser, DIY SQM
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3 months 1 week ago
DerPit
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Meridian Flip Configuration #49903
It goes to the same coordinates. Where that is 'on the sky' depends on the quality of your pointing model. So usually it does a solve-and-slew round after flip, if the flip was initiated by EKOS. If it does the flip because it hit the mounts setting limit, this of course doesn't happen, and you are left with the accuracy of your pointing/alignment.

openSUSE Tumbleweed KStars git INDI git
GPDX+EQMOD, CEM60EC, ASI1600+EFW+EAF+ASI290 mini

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3 months 1 week ago
ChrisRowland
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Meridian Flip Configuration #49905
Normally it's possible to reach any position from one side or the other of the pier and it is possible to track a reasonable distance past the meridian. I'm not sure that all of this applies to your mount and you have a very small range where you can reach an object wth the mount on either side of the meridian. It may even be that there is a zone which can't be reacked at all.

As Der Pit says pointing errors may make your mount point differently when the pier side is changed. Ekos will usually do a solve and sync after a pier flip, at least when it's imaging.

As I said before I don't think there's anything in Ekos to manage hour angle limits, at least at present.

i'm not sure how much we can help though, we can't see your mount and so can't see much of what is needed to help you work out what is going on. A few lines of social media posting doesn't give us much. The result is confusion, misunderstanding and misinformation.

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