Date   

Re: Superstitious

MartinC
 

Hi Paul,

Forgive me but just from the outside looking in it sounds like too much of a coincidence that the mount should suddenly develop a problem whilst you were 'working' on it. Generally I don't believe in coincidence. Are you sure you've not accidentally changed a setting related to the motor or encoder? 

I guess you have your config files backed up? If so maybe reload them before looking for a mechanical or electrical problem.

Best wishes 
Martin



Sent from my Galaxy


Re: Superstitious

paul K
 

yes it's from 2015 Jaspal
best
Paul


On Thu, 22 Apr 2021 at 19:52, Jaspal Chadha via groups.io <jaspalchadha=icloud.com@groups.io> wrote:
Mark1 I assume Paul ? 

Kind Regards 

On 22 Apr 2021, at 19:44, paul K <paulskirk53@...> wrote:

I'm not a Superstitious person, but it did occur to me a few posts back when I mentioned about my MESU 200 that 'nothing had ever gone wrong with it, that it might just be tempting fate.

So today I was doing some daytime tests with the dreaded meridian limits to work out a good eastern limt for my situation, and when I parked the mount, the Dec axis started sounding like a shaken bag of nails. I got the Sitech error

encoder tracking error

And the mount stopped moving which I guess is good.

Anyone got any experience of how to take the beast apart to inspect? There's lots of hex head bolts.....There used to be a MESU 200 forum on Yahoo, I'll see if I can find that too.

thanks,

best wishes
Paul


Re: Superstitious

Jaspal Chadha
 

Mark1 I assume Paul ? 

Kind Regards 

On 22 Apr 2021, at 19:44, paul K <paulskirk53@...> wrote:

I'm not a Superstitious person, but it did occur to me a few posts back when I mentioned about my MESU 200 that 'nothing had ever gone wrong with it, that it might just be tempting fate.

So today I was doing some daytime tests with the dreaded meridian limits to work out a good eastern limt for my situation, and when I parked the mount, the Dec axis started sounding like a shaken bag of nails. I got the Sitech error

encoder tracking error

And the mount stopped moving which I guess is good.

Anyone got any experience of how to take the beast apart to inspect? There's lots of hex head bolts.....There used to be a MESU 200 forum on Yahoo, I'll see if I can find that too.

thanks,

best wishes
Paul


Superstitious

paul K
 

I'm not a Superstitious person, but it did occur to me a few posts back when I mentioned about my MESU 200 that 'nothing had ever gone wrong with it, that it might just be tempting fate.

So today I was doing some daytime tests with the dreaded meridian limits to work out a good eastern limt for my situation, and when I parked the mount, the Dec axis started sounding like a shaken bag of nails. I got the Sitech error

encoder tracking error

And the mount stopped moving which I guess is good.

Anyone got any experience of how to take the beast apart to inspect? There's lots of hex head bolts.....There used to be a MESU 200 forum on Yahoo, I'll see if I can find that too.

thanks,

best wishes
Paul


Re: message to all members regarding wiki idea

paul K
 

Just as an update on this, I have the MediaWiki software installed now. I will take a look over the next few days and see what I can find out. I found a basic / beginners tutroial on youtube.

If anyone knows a good mediawiki tutorial which covers creating the user group, setting permissions etc that would be helpful.

best wishes
Paul


Re: message to all members regarding wiki idea

lunaticoastro
 

Me too I like the idea!

Thanks Paul

Jaime


On Sat, Apr 17, 2021 at 2:20 PM MartinC via groups.io <mncrane=virginmedia.com@groups.io> wrote:
Hi Paul, 

I think that's a very interesting suggestion. We have something similar (different format) where I work for technical support issues. I reckon it would need to feature some form of configurable search facility but to answer your question I think your idea has merit.

Best regards
Martin



Sent from my Galaxy


Re: Meridian Flip Settings Explained

MartinC
 

Hi Don,

As promised I have converted the video to a different format. From the following link you should be able to play it using Windows media player or the Films & TV app in W10. VLC media player is a free app that will play just about any format & is available for MAC or PC.

https://1drv.ms/v/s!AneSiXQRo7prjBRzU_e0UVaJ8I3Z?e=ymEZsK

Alternatively if know which format you prefer I'll try my best to provide it for you.

Best regards
Martin


Re: Meridian Flip Settings Explained

MartinC
 

Hi Paul, 
Yes that's it exactly. My observatory is small compared the the scope size. The dew shield is always very close to the dome walls & the shutter threshold is quite high. The difference in dew shield height between starting imaging with weights up/down is approx 1.6m. So if I begin imaging weights up either in the east or the west my scope can't always 'see' over the shutter threshold. That's why I need it to flip on goto's so that I can begin imaging a new target weights down. I'm happy for it to track past the Meridian until I run out of useful sky.

So my criteria are:
I need it to flip on goto's 
I need it to track past both Meridian
I need it to operate with the Meridian in the correct place; not st a Meridian that's been artificially moved to a different place in the sky.

Best wishes 
Martin



Sent from my Galaxy


Re: Meridian Flip Settings Explained

paul K
 

Hi Martin, just to show my lack of understanding of this subject, if it's a flipless mount, why do you need it to flip on Goto? What would be the criteria for that? I thought the idea of flipless was you could point at an object rising on the eastern horizon (scope would be pointing east) and you'd just track that right through to the west? I guess your observatory building might be a constraint for that as counterweights go up as you track. I've obviously missed something.

best,
Paul


Re: Meridian Flip Settings Explained

MartinC
 

Hi paul, yes it's very useful. I used it a lot when I was writing my dome driver as you can test during the day as if it were imaging for real.

By the way I've checked my video & that check box is meant to be selected as I need my mount to flip on Goto's.

Best regards
Martin


Re: Meridian Flip Settings Explained

MartinC
 

Hi Paul, 
Many thanks for your comments. I feel you are probably right and I have reached out to Dan.

Regarding the tick box it certainly isn't intentionally ticked, although I have tried both options just for kicks. I'll check the video again. It may be where my mouse was hovering? 

I'll see if can convert the video format so Don can hopefully view it.

Best regards
Martin



Re: Meridian Flip Settings Explained

paul K
 
Edited

Hi Martin , at point 3.45 ish in the vid I noticed you have GEM autoflip goto checked. Would it be useful to uncheck this as essentially you don't want flips at all. Just a thought....

I think the ASCOM v2 camera simulator is brill, especially for indoor modelling of situations which were previously taking up precious night time. I have used it for modelling different cameras in SGP with the framing and mosaic wizard to check out FOVs, but what you've shown re loading an image means it's a true simulator, a very clever piece of software, thanks for sharing that.

best
Paul


Re: Meridian Flip Settings Explained

paul K
 

Hi Martin, When I click your link I am presented with a onedrive dialog which looks like it's asking to sign in or create an account, but on looking more closely there is a download button and the downloaded file works fine on my WIN 10 PC.

Regards the problem, I am no expert, but intuitively, if you have limits of some kind, there will be an operational limit/ problem. So I feel you may be back to asking Dan to program in a solution for flipless GEMs

Dan obviously knows the code and how difficult or easy it might be to do this.

best wishes
Paul


Re: Meridian Flip Settings Explained

MartinC
 

Hi Don, 
That's a shame about the video. I'll see what I can do about that.

Basically I'm still having the same problem. It doesn't matter where I place the limits, it just moves the problem to a different place in the sky.

Best regards
Martin



Sent from my Galaxy


Re: Meridian Flip Settings Explained

Don W
 

Sorry Martin,
Your video doesn't play on my PC.  So what is your verdict?  Does it work or are you having problems still?  Videos don't help for me.
Don W


Re: Meridian Flip Settings Explained

MartinC
 

Hi Don & others who may be interested,

I have adopted the settings shown above & thought it may be more useful to show a display video capture of my experience. There is more background to this in a previous thread https://groups.io/g/Sitechservo/topic/offset_init_flip_during_sgp/81890636?p=,,,20,0,0,0::recentpostdate%2Fsticky,,,20,2,0,81890636

My video is about 13 min long & too large to upload here so it can be downloaded from my OneDrive
https://1drv.ms/v/s!AneSiXQRo7prjBJjqfM5hHoh0I1S?e=3yoPlr

I run through my setup and configuration and demonstrate how my mount behaves for the same target but with the adopted settings compared to the default settings.

Hopefully someone with more experience than me will spot something.

Many thanks
Martin


Re: Meridian Flip Settings Explained

Don W
 

Hi Martin,
The zenith is straight UP.  West is 90° west from that point - NOT the pole!  This is NOT DEC or RA.

The settings for over the pole are exactly what they say.  If you want the mount to flip at the limit you set, then check that box.  If you want it to flip every time you slew (so the counter weight will always be down), then set the limits to zero and the check box to slew.

Early on I recommended setting the slew limit for West to 90°, this was for the understanding that the user wants to NEVER flip.  Leaving the East limit to zero means it will always be counter weight down looking east.

Don W


Re: RA Problem

Gary Hug
 

Thanks Chuck,
And thanks to everyone on this SiTech.io group for such wonderful support.
The 'Little Blue 22' is functioning again.
cheers
Gary

On 4/18/2021 8:41 PM, CandCShaw wrote:
Gary,
Another cause for the motors to vary in speed is if you are using a custom Horizon (check "Use Horizon File Sitech.hrz" checked, and you have "Keep Horizon Limit while slewing" checked  Both are in the upper right area of the Config > ChangeConfig! . > MountParams tab.
Chuck
Chuck Shaw
On Sun, Apr 18, 2021 at 9:25 PM Gary Hug <garyhug@mercurywireless.net <mailto:garyhug@mercurywireless.net>> wrote:
Hi Russell,
No, there was no growling and it didn't stop the motor but as I told Don I
wrongly made the assumption that my motor configuration was OK. It wasn't.
After going back and reworking the numbers I was able to hear the difference
and
the motor now looks and sounds the same in each direction.  (actually the
apparent speed of the east movement is now as fast as the west movement.) I
never knew that one direction could be affected more than the other.   At this
point I'm eager to adjust both RA and DEC to finally bring the scope pointing
accuracy to +/- and arc minute or so. It's just now getting dark enough to try.
  I'll send out a report toward morning on the results but I'm pretty sure
it'll
work now.
(93,754,919 RA ticks/360 degrees to be exact - at least until I refine that
number thru tonight's calibration run.) The scope weighs roughly 1200 lbs.
Thanks to you and Don for the support.  Also to Dan and Taij.  Its great to
have
such support with a wonderful company like SiTech.
cheers
Gary
On 4/18/2021 6:55 PM, Russell R via groups.io <http://groups.io> wrote:
> Gary,
>
> When the motor starts to slow down after ramping up, does it sound like it's
> "growling" when running at ½ speed, then "frees up" when getting near the
target?
>
> If so, try slowing down the slew speed in Servo Config and see what happens.
> This same thing happened to me, and when I dropped the slew speed a bit, it
> stopped doing that.
>
> I am limited to just under 2° slew speed at 64M ticks. I was able to go
over 2°
> for years, not sure if it had something to do with a updated version
SiTech.exe.
>
> You also mentioned you are in the range of 93M ticks, do you know the
tick count
> exact?  That's a whole lot of tickin goin on. :-)
>
> Russell R.
>


Re: Meridian Flip Settings Explained

MartinC
 

Hi Don,

Thanks for your explanation.

I've just noticed that the settings in your screen shot have both Over Pole limits = 0. In post #32847 it was suggested "3. Set the Meridian Limit West to 90:00:00."  So I shall try 0 for each.

Can I just ask about your comment in point 4 above " These limits are in degrees-minutes-seconds of arc, FROM THE ZENITH! " Do you mean the Pole rather than zenith, as the pole is where the meridiean & track past lines intersect or have I misundestood something?

May I aslo ask your opinion on something:
I did not experience any meridian flips during plate solving. What happened was a slew, in RA only, to a point on the oposite side of the meridian. Preumably this was because Sitech thought my mount was out in RA by that amount. It then re-plate solved and returned to the correct place & continued imaging. I can only assume that the 2nd plate solve re-initialised the mount which corrected whatever had caused the RA error detected by first plate solve????

Given the above, if you ever make changes to any of the meridian & track past settings, would you recommend re-initialising and maybe even re-setting your park position before doing anything else?

I'm wondering if this may be where I'm introducing problems because I've not considered it before. Now I'm wondering if I should?

Many thanks
Martin


Re: RA Problem

Joshua Hufford
 

1200 Lbs. of scope? That requires some pictures!  :))

Josh

On Sun, Apr 18, 2021 at 9:57 PM Russell R via groups.io <rem.64=yahoo.com@groups.io> wrote:
Gary,

That's good news!   1200#......Wow, maybe you could post a pic of that big boy.  

I could not agree more!!! 
Dan, Taj, Don, & Chuck are just awesome folks!  Dan really stands behind his products and tries to help solve everyone's individual nit-picky issues, even if he has to re-write the software.
Each one of these guys and others here, helped me along the way for sure.

Best,
Russell R.

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