Question please:
 
Does Kstars/Ekos require an exact match on a requested PA or is there some hysteresis allowed or status polling to determine if the move is complete?

I.E.: Requested PA = 0, final PA is 0.04, etc

Thanks!

Gene
 

It's set in alignment module and by default 30 arcminutes (0.5 degree)

Thanks. I am not an ekos/kstars user so not familiar with alignment module.
Here is what I see, stuck because returned position not exact or within some allowed variance.
he single entry sequence had a move rotator to 45.00 degrees.
The driver thinks all is done but there is a variance of  0.083 degrees (44.917 vs 45.00) and ekos is spinning forever.

  

The device in question does not have an even number of steps per degree but the math should always be less than 0.1 degrees.

Thoughts?

I just tested with simulator and introduced an offset and it worked fine. Anything within 0.5 degrees by default would be accepted. Can you go to align --> Options --> and check rotator threshold? it should be 30 by default (30/60 = 0.5)

Thank you again!

Now what I see is if the reported Rotator angle is within the bounds ekos then runs the sequence, even though the rotator may still be moving.
This is on Kstars 3.5.5 stable
In pic below, PA was set to 3.0, Rotator threshold was set to 30.0
The display shows image being captured when rotator was at 2.5 (Expose Seconds left 0.67)

 

Good point, need to introduce a settle time.

Settle time variable?
I aggravated the above by setting step rate at 6 steps/second and 11 steps/degree so was moving -real slow-, not quite 6 sec to go 3deg.
At default step rate would have taken 0.22 sec total for 3 deg.

Two things are needed:

1. Only mark as complete if below the threshold AND state is not BUSY.
2. Settle before next action. This is configurable, but maybe around 1 second is good.

So i just have upgraded my setup with the Falcon Rotator. With the rotation enabled in the Plate Solving module the alignment works great. But it would be nice if the Rotators absoute position is written into the Fits headers of all Lights AND Flats. 

Here are the current Fits Headers of a Light:
<code>SIMPLE  =                    T / file does conform to FITS standard
BITPIX  =                   16 / number of bits per data pixel
NAXIS   =                    2 / number of data axes
NAXIS1  =                 6248 / length of data axis 1
NAXIS2  =                 4176 / length of data axis 2
EXTEND  =                    T / FITS dataset may contain extensions
COMMENT   FITS (Flexible Image Transport System) format is defined in 'Astronomy
COMMENT   and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H
BZERO   =                32768 / offset data range to that of unsigned short
BSCALE  =                    1 / default scaling factor
ROWORDER= 'TOP-DOWN'           / Row Order
INSTRUME= 'ZWO CCD ASI2600MM Pro' / CCD Name
TELESCOP= 'EQMod Mount'        / Telescope name
OBSERVER= 'Unknown '           / Observer name
OBJECT  = 'M_42    '           / Object name
EXPTIME =         1.800000E+02 / Total Exposure Time (s)
CCD-TEMP=           -1.470E+01 / CCD Temperature (Celsius)
PIXSIZE1=         3.760000E+00 / Pixel Size 1 (microns)
PIXSIZE2=         3.760000E+00 / Pixel Size 2 (microns)
XBINNING=                    1 / Binning factor in width
YBINNING=                    1 / Binning factor in height
XPIXSZ  =         3.760000E+00 / X binned pixel size in microns
YPIXSZ  =         3.760000E+00 / Y binned pixel size in microns
FRAME   = 'Light   '           / Frame Type
IMAGETYP= 'Light Frame'        / Frame Type
FILTER  = 'Ha      '           / Filter
FOCALLEN=            7.190E+02 / Focal Length (mm)
APTDIA  =            1.300E+02 / Telescope diameter (mm)
SCALE   =         1.078843E+00 / arcsecs per pixel
SITELAT =         4.793708E+01 / Latitude of the imaging site in degrees
SITELONG=         1.071778E+01 / Longitude of the imaging site in degrees
AIRMASS =         2.770804E+00 / Airmass
OBJCTAZ =         1.252111E+02 / Azimuth of center of image in Degrees
OBJCTALT=         2.105718E+01 / Altitude of center of image in Degrees
OBJCTRA = ' 5 35 15.04'        / Object J2000 RA in Hours
OBJCTDEC= '-5 23 32.05'        / Object J2000 DEC in Degrees
RA      =         8.381266E+01 / Object J2000 RA in Degrees
DEC     =        -5.392235E+00 / Object J2000 DEC in Degrees
EQUINOX =                 2000 / Equinox
CRVAL1  =     8.3812663523E+01 / CRVAL1
CRVAL2  =    -5.3922353051E+00 / CRVAL1
RADECSYS= 'FK5     '           / RADECSYS
CTYPE1  = 'RA---TAN'           / CTYPE1
CTYPE2  = 'DEC--TAN'           / CTYPE2
CRPIX1  =     3.1240000000E+03 / CRPIX1
CRPIX2  =     2.0880000000E+03 / CRPIX2
SECPIX1 =     1.0788428345E+00 / SECPIX1
SECPIX2 =     1.0788428345E+00 / SECPIX2
CDELT1  =     2.9967856515E-04 / CDELT1
CDELT2  =     2.9967856515E-04 / CDELT2
CROTA1  =     2.7025709091E+02 / CROTA1
CROTA2  =     2.7025709091E+02 / CROTA2
DATE-OBS= '2022-01-14T17:56:49.929' / UTC start date of observation
COMMENT Generated by INDI
GAIN    =                 100. / Gain
OFFSET  =                  50. / Offset
</code>

And here of a Flat:
<code>SIMPLE  =                    T / file does conform to FITS standard
BITPIX  =                   16 / number of bits per data pixel
NAXIS   =                    2 / number of data axes
NAXIS1  =                 6248 / length of data axis 1
NAXIS2  =                 4176 / length of data axis 2
EXTEND  =                    T / FITS dataset may contain extensions
COMMENT   FITS (Flexible Image Transport System) format is defined in 'Astronomy
COMMENT   and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H
BZERO   =                32768 / offset data range to that of unsigned short
BSCALE  =                    1 / default scaling factor
ROWORDER= 'TOP-DOWN'           / Row Order
INSTRUME= 'ZWO CCD ASI2600MM Pro' / CCD Name
TELESCOP= 'EQMod Mount'        / Telescope name
OBSERVER= 'Unknown '           / Observer name
OBJECT  = 'Soul_Nebula'        / Object name
EXPTIME =         3.017761E-01 / Total Exposure Time (s)
CCD-TEMP=            6.500E+00 / CCD Temperature (Celsius)
PIXSIZE1=         3.760000E+00 / Pixel Size 1 (microns)
PIXSIZE2=         3.760000E+00 / Pixel Size 2 (microns)
XBINNING=                    1 / Binning factor in width
YBINNING=                    1 / Binning factor in height
XPIXSZ  =         3.760000E+00 / X binned pixel size in microns
YPIXSZ  =         3.760000E+00 / Y binned pixel size in microns
FRAME   = 'Flat    '           / Frame Type
IMAGETYP= 'Flat Frame'         / Frame Type
FILTER  = 'Ha      '           / Filter
FOCALLEN=            7.400E+02 / Focal Length (mm)
APTDIA  =            1.300E+02 / Telescope diameter (mm)
SCALE   =         1.048227E+00 / arcsecs per pixel
DATE-OBS= '2022-01-15T08:12:39.111' / UTC start date of observation
COMMENT Generated by INDI
GAIN    =                 100. / Gain
OFFSET  =                  50. / Offset
</code>


Thanks for help
 

It should be recorded for both if the Rotator was specified in camera ACTIVE_DEVICES properties, it's not set there?

Ahh!

I had to write the name of the Rotator manually into the options Tab ...
Now the Infos are present!

Thanks!

This was missed in 3.5.6, I just added it for 3.5.7 so you don't have to do it manually.