Richard Beck replied to the topic 'Meridian Flip Configuration' in the forum. 7 days ago

Since my last post, I had two, IIRC, cases where the capture and slew of a target too close to the meridian would not point to the correct location. I didn't post them at the time because I didn't have good notes to point someone else where to look for them in the logs (different nights and targets).

After I reset the mount and ensured it was working correctly (I don't recall what all I had wrong), automatic meridian flips have been working just fine. I'm using 1/2 hour past the meridian as my criterion.

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Richard Beck replied to the topic 'Re:EQ-6 and PEC' in the forum. 1 week ago

Eric,

Who looks after EQMOD? EQASCOM uses VS-PEC ( eq-mod.sourceforge.net/docs/eqmod_vs-pec.pdf ). Surely, we can sort out how to create a PE profile on these mounts and then apply it at the driver level.

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Richard Beck replied to the topic 'Meridian Flip Configuration' in the forum. 1 month ago

2 arc minutes puts the target outside my FOV.

It's more important to note that this was the plate-solved location that was meant to be M42. I guess I'll just chalk this up as an ongoing mystery.

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Richard Beck replied to the topic 'Meridian Flip Configuration' in the forum. 1 month ago

Look at line 146277 which shows the mount is on target for M42 at 19:27:54(+) local time. This was on the west side of the pier. I realigned at 19:52 (194825), 20:00 (276814) and 20:18 (311291). At 20:18, the accepted solution is about 2 minutes in declination from M42 (which isn't Alnitak either). I'm still confused....

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Richard Beck replied to the topic 'Meridian Flip Configuration' in the forum. 1 month ago

Are you saying my mount model is reflected in KStars? When the mount slewed to Alnitak instead of M42 and plate solving said I was on target, I looked at KStars to see where it thought I was pointing and it indicated Alnitak. I selected M42 in KStars and told EQMod to slew to M42 and it wouldn't move there.

When it wouldn't move to M42, I went to the Flame Nebula in KStars and told EQMod to slew to it. The slew showed properly in KStars, staying on the east side, and plate solving showed I was very close to the target. It took about the usual amount of fine moves to get the mount centered on the target within the tolerance I had given.

I have attached the log from this particular session for additional information. I think the issue starts around line 439150, local time 21:21:30.

File Attachment:

File Name: log_17-19-02.zip
File Size: 7,516 KB


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Richard Beck replied to the topic 'Meridian Flip Configuration' in the forum. 1 month ago

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.

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Richard Beck replied to the topic 'Meridian Flip Configuration' in the forum. 1 month ago

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.

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Richard Beck replied to the topic 'Meridian Flip Configuration' in the forum. 1 month ago

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?

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Richard Beck replied to the topic 'Meridian Flip Configuration' in the forum. 2 months ago

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.

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Richard Beck replied to the topic 'Meridian Flip Configuration' in the forum. 2 months ago

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 followed up with a slew to a point nearer the NCP which plate solved well, and the following slew was also good.

I'll do a similar check later today.

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