Dirk Tetzlaff replied to the topic 'Skywatcher Alt-Az backlash' in the forum. 2 years ago

some further information regarding the issue: even though it appears the same as backlash compensation, it apparantly has a different root cause. Here is part of the log file. First part is with tracking enabled, the second part is with tracking disabled (which can only be turned on/off via indi control panel, not with the ekos panel). With tracking disabled the backtracking move does not occur, only with tracking enabled. Does the encoder readout initiate the backtracking ? Can I disable this ? Can anybody please give a hint, here ?

/w tracking enabled:

[2021-03-13T12:16:13.450 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] SkywatcherAPIMount::Goto "
[2021-03-13T12:16:13.450 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] RA 8.566670 DEC 60.416700 "
[2021-03-13T12:16:13.452 CET INFO ][           org.kde.kstars.indi] - Skywatcher Alt-Az :  "[INFO] New Tracking target RA  8:34:00 DEC 60:25:00 "
[2021-03-13T12:16:13.452 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] Celestial to telescope - Actual Alt 28.736193 Az 22.181683"
[2021-03-13T12:16:13.452 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] Celestial to telescope - Apparent Alt 28.736193 Az 22.181683"
[2021-03-13T12:16:13.452 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] TDV x 0.811949 y -0.331047 z 0.480777 "
[2021-03-13T12:16:13.452 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Conversion OK "
[2021-03-13T12:16:13.453 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] New Altitude 28.736193 degrees 735646 microsteps Azimuth 22.181683 degrees 567851 microsteps "
[2021-03-13T12:16:13.473 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Initial Axis2 8388608 microsteps Axis1 8388608 microsteps "
[2021-03-13T12:16:13.473 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Current Axis2 9124392 microsteps Axis1 8955906 microsteps "
[2021-03-13T12:16:13.474 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Altitude offset -138 microsteps Azimuth offset 553 microsteps "
[2021-03-13T12:16:13.476 CET INFO ][           org.kde.kstars.indi] - Skywatcher Alt-Az :  "[INFO] SlewTo axis: 0 offset: 553 "
[2021-03-13T12:16:13.478 CET INFO ][           org.kde.kstars.indi] - Skywatcher Alt-Az :  "[INFO] SlewTo axis 0 Offset 553 CurrentEncoder 8955906 SlewToTarget 8956459 "
[2021-03-13T12:16:13.493 CET INFO ][           org.kde.kstars.indi] - Skywatcher Alt-Az :  "[INFO] SlewTo axis: 1 offset: -138 "
[2021-03-13T12:16:13.497 CET INFO ][           org.kde.kstars.indi] - Skywatcher Alt-Az :  "[INFO] SlewTo axis 1 Offset -138 CurrentEncoder 9124392 SlewToTarget 9124254 "
[2021-03-13T12:16:13.964 CET DEBG ][     org.kde.kstars.ekos.mount] - Mount status changed from  "Idle"  to  "Slewing"
[2021-03-13T12:16:13.971 CET INFO ][     org.kde.kstars.ekos.guide] - "Mount is moving. Resetting calibration..."
[2021-03-13T12:16:13.972 CET INFO ][     org.kde.kstars.ekos.guide] - "Calibration is cleared."
[2021-03-13T12:16:14.445 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] SkywatcherAPIMount::ReadScopeStatus "
[2021-03-13T12:16:14.483 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Axis2 encoder 9124254 initial 8388608 alt(degrees) 28.736172 "
[2021-03-13T12:16:14.483 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Axis1 encoder 8956459 initial 8388608 az(degrees) 22.181680 "
[2021-03-13T12:16:14.483 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] TDV x 0.811949 y -0.331047 z 0.480777 "
[2021-03-13T12:16:14.484 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] Telescope to celestial - Apparent Alt 28.736172 Az 22.181680"
[2021-03-13T12:16:14.484 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] ApparentVector x 0.811949 y -0.331047 z 0.480777"
[2021-03-13T12:16:14.484 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] ActualVector x 0.811949 y -0.331047 z 0.480777"
[2021-03-13T12:16:14.484 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] Telescope to Celestial - Actual Alt 28.736172 Az 22.181680"
[2021-03-13T12:16:14.484 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Conversion OK "
[2021-03-13T12:16:14.484 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] New RA 8.566666 (hours) DEC 60.416682 (degrees) "
[2021-03-13T12:16:14.487 CET INFO ][           org.kde.kstars.indi] - Skywatcher Alt-Az :  "[INFO] Slewing started "
[2021-03-13T12:16:15.483 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] SkywatcherAPIMount::ReadScopeStatus "
[2021-03-13T12:16:15.511 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Axis2 encoder 9124254 initial 8388608 alt(degrees) 28.736172 "
[2021-03-13T12:16:15.511 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Axis1 encoder 8956459 initial 8388608 az(degrees) 22.181680 "
[2021-03-13T12:16:15.512 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] TDV x 0.811949 y -0.331047 z 0.480777 "
[2021-03-13T12:16:15.512 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] Telescope to celestial - Apparent Alt 28.736172 Az 22.181680"
[2021-03-13T12:16:15.512 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] ApparentVector x 0.811949 y -0.331047 z 0.480777"
[2021-03-13T12:16:15.513 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] ActualVector x 0.811949 y -0.331047 z 0.480777"
[2021-03-13T12:16:15.514 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] Telescope to Celestial - Actual Alt 28.736172 Az 22.181680"
[2021-03-13T12:16:15.514 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Conversion OK "
[2021-03-13T12:16:15.515 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] New RA 8.566952 (hours) DEC 60.416682 (degrees) "
[2021-03-13T12:16:15.522 CET INFO ][           org.kde.kstars.indi] - Skywatcher Alt-Az :  "[INFO] Tracking started "
[2021-03-13T12:16:15.523 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] Celestial to telescope - Actual Alt 28.739072 Az 22.188105"
[2021-03-13T12:16:15.523 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] Celestial to telescope - Apparent Alt 28.739072 Az 22.188105"
[2021-03-13T12:16:15.524 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] TDV x 0.811889 y -0.331129 z 0.480822 "
[2021-03-13T12:16:15.524 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] Tracking AXIS1 CurrentEncoder 8956459 OldTrackingTarget 8957762 AXIS2 CurrentEncoder 9124254 OldTrackingTarget 9131076 "
[2021-03-13T12:16:15.525 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] New Tracking Target Altitude 28.739072 degrees 735720 microsteps Azimuth 22.188105 degrees 568015 microsteps "
[2021-03-13T12:16:15.526 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] New Tracking Target AltitudeOffset 74 microsteps AzimuthOffset 164 microsteps "
[2021-03-13T12:16:15.526 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] SetClockTicksPerMicrostep "
[2021-03-13T12:16:15.527 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] Tracking - AXIS1 restart "
[2021-03-13T12:16:15.527 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] Tracking - AXIS1 offset 164 microsteps rate 97560 direction 0 "
[2021-03-13T12:16:15.528 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] SetClockTicksPerMicrostep "
[2021-03-13T12:16:15.553 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] Tracking - AXIS2 restart "
[2021-03-13T12:16:15.554 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] Tracking - AXIS2 offset 74 microsteps rate 216216 direction 0 "
[2021-03-13T12:16:15.554 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] Tracking - AXIS1 error 1303 AXIS2 error 6822 "
[2021-03-13T12:16:15.964 CET DEBG ][     org.kde.kstars.ekos.mount] - Mount status changed from  "Slewing"  to  "Tracking"
[2021-03-13T12:16:15.964 CET DEBG ][     org.kde.kstars.ekos.mount] - Slew finished, MFStatus  "FLIP_NONE"

/w tracking disabled:
[2021-03-13T12:15:32.966 CET DEBG ][     org.kde.kstars.ekos.mount] - Mount status changed from  "Tracking"  to  "Idle"
[2021-03-13T12:15:33.338 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] SkywatcherAPIMount::ReadScopeStatus "
[2021-03-13T12:15:33.427 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Axis2 encoder 9131072 initial 8388608 alt(degrees) 29.002500 "
[2021-03-13T12:15:33.429 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Axis1 encoder 8957753 initial 8388608 az(degrees) 22.232227 "
[2021-03-13T12:15:33.429 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] TDV x 0.809579 y -0.330914 z 0.484848 "
[2021-03-13T12:15:33.429 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] Telescope to celestial - Apparent Alt 29.002500 Az 22.232227"
[2021-03-13T12:15:33.430 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] ApparentVector x 0.809579 y -0.330914 z 0.484848"
[2021-03-13T12:15:33.430 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] ActualVector x 0.809579 y -0.330914 z 0.484848"
[2021-03-13T12:15:33.430 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] Telescope to Celestial - Actual Alt 29.002500 Az 22.232227"
[2021-03-13T12:15:33.431 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Conversion OK "
[2021-03-13T12:15:33.431 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] New RA 8.533380 (hours) DEC 60.633300 (degrees) "
[2021-03-13T12:15:33.448 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] SkywatcherAPIMount::MoveNS "
[2021-03-13T12:15:33.450 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] Starting Slew South "
[2021-03-13T12:15:33.451 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] Slew axis: 1 speed: -0.004667 "
[2021-03-13T12:15:33.457 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] SetClockTicksPerMicrostep "
[2021-03-13T12:15:33.965 CET DEBG ][     org.kde.kstars.ekos.mount] - Mount status changed from  "Idle"  to  "Moving S"
[2021-03-13T12:15:34.156 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] SkywatcherAPIMount::MoveNS "
[2021-03-13T12:15:34.157 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] Stopping Slew South "
[2021-03-13T12:15:34.429 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] SkywatcherAPIMount::ReadScopeStatus "
[2021-03-13T12:15:34.432 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Axis2 encoder 9126345 initial 8388608 alt(degrees) 28.817852 "
[2021-03-13T12:15:34.432 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Axis1 encoder 8957753 initial 8388608 az(degrees) 22.232227 "
[2021-03-13T12:15:34.433 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] TDV x 0.811021 y -0.331504 z 0.482027 "
[2021-03-13T12:15:34.433 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] Telescope to celestial - Apparent Alt 28.817852 Az 22.232227"
[2021-03-13T12:15:34.433 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] ApparentVector x 0.811021 y -0.331504 z 0.482027"
[2021-03-13T12:15:34.434 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] ActualVector x 0.811021 y -0.331504 z 0.482027"
[2021-03-13T12:15:34.434 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] Telescope to Celestial - Actual Alt 28.817852 Az 22.232227"
[2021-03-13T12:15:34.435 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Conversion OK "
[2021-03-13T12:15:34.435 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] New RA 8.545136 (hours) DEC 60.469166 (degrees) "
[2021-03-13T12:15:34.965 CET DEBG ][     org.kde.kstars.ekos.mount] - Mount status changed from  "Moving "  to  "Idle"
[2021-03-13T12:15:35.398 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] SkywatcherAPIMount::ReadScopeStatus "
[2021-03-13T12:15:35.420 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Axis2 encoder 9126345 initial 8388608 alt(degrees) 28.817852 "
[2021-03-13T12:15:35.421 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Axis1 encoder 8957753 initial 8388608 az(degrees) 22.232227 "
[2021-03-13T12:15:35.422 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] TDV x 0.811021 y -0.331504 z 0.482027 "
[2021-03-13T12:15:35.423 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] Telescope to celestial - Apparent Alt 28.817852 Az 22.232227"
[2021-03-13T12:15:35.424 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] ApparentVector x 0.811021 y -0.331504 z 0.482027"
[2021-03-13T12:15:35.424 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] ActualVector x 0.811021 y -0.331504 z 0.482027"
[2021-03-13T12:15:35.425 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] Telescope to Celestial - Actual Alt 28.817852 Az 22.232227"
[2021-03-13T12:15:35.425 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Conversion OK "
[2021-03-13T12:15:35.426 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] New RA 8.545422 (hours) DEC 60.469166 (degrees) "
[2021-03-13T12:15:35.650 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] SkywatcherAPIMount::MoveNS "
[2021-03-13T12:15:35.651 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] Starting Slew South "
[2021-03-13T12:15:35.651 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] Slew axis: 1 speed: -0.004667 "
[2021-03-13T12:15:35.660 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] SetClockTicksPerMicrostep "
[2021-03-13T12:15:35.672 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] SkywatcherAPIMount::MoveWE "
[2021-03-13T12:15:35.673 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] Starting Slew West "
[2021-03-13T12:15:35.673 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] Slew axis: 0 speed: -0.004667 "
[2021-03-13T12:15:35.681 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] SetClockTicksPerMicrostep "
[2021-03-13T12:15:35.951 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] SkywatcherAPIMount::MoveNS "
[2021-03-13T12:15:35.952 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] Stopping Slew South "
[2021-03-13T12:15:35.956 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] SkywatcherAPIMount::MoveWE "
[2021-03-13T12:15:35.956 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[SCOPE] Stopping Slew West "
[2021-03-13T12:15:36.420 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] SkywatcherAPIMount::ReadScopeStatus "
[2021-03-13T12:15:36.448 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Axis2 encoder 9124392 initial 8388608 alt(degrees) 28.741563 "
[2021-03-13T12:15:36.449 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Axis1 encoder 8955906 initial 8388608 az(degrees) 22.160078 "
[2021-03-13T12:15:36.449 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] TDV x 0.812032 y -0.330724 z 0.480860 "
[2021-03-13T12:15:36.449 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] Telescope to celestial - Apparent Alt 28.741563 Az 22.160078"
[2021-03-13T12:15:36.449 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] ApparentVector x 0.812032 y -0.330724 z 0.480860"
[2021-03-13T12:15:36.450 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] ActualVector x 0.812032 y -0.330724 z 0.480860"
[2021-03-13T12:15:36.450 CET DEBG ][           org.kde.kstars.indi] - AlignmentSubSystem: "[ALIGNMENT] Telescope to Celestial - Actual Alt 28.741563 Az 22.160078"
[2021-03-13T12:15:36.450 CET DEBG ][           org.kde.kstars.indi] - Skywatcher Alt-Az : "[ALIGNMENT] Conversion OK "

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