Recently, guiding on my iOptron mount has gone haywire. DEC guiding does not work at all, the mount is progressively drifting away from the guide star in DEC.
Calibration works flawlessly and side of pier is correctly detected.
After inspecting the log, it looks to me that the deflections in DEC are consistently reversed, while they are applied appropriatly in the right direction in RA.
Below an excerpt from the log to illustrate what I think the problem is:
Star X : 303.252 Y : 60.4055
[2020-04-29T21:43:17.450 CDT DEBG ][ org.kde.kstars.ekos.guide] - Reticle X : 302.963 Y : 60.4732
[2020-04-29T21:43:17.450 CDT DEBG ][ org.kde.kstars.ekos.guide] - Star RA: 1954.69 DEC: 389.36
[2020-04-29T21:43:17.450 CDT DEBG ][ org.kde.kstars.ekos.guide] - Reticle RA: 1952.83 DEC: 389.797
[2020-04-29T21:43:17.451 CDT DEBG ][ org.kde.kstars.ekos.guide] -
> BEFORE ROTATION Diff RA: 1.86541 DEC: 0.436438
[2020-04-29T21:43:17.451 CDT DEBG ][ org.kde.kstars.ekos.guide] -
> AFTER ROTATION Diff RA: -0.553593 DEC: 1.83406
[2020-04-29T21:43:17.451 CDT DEBG ][ org.kde.kstars.ekos.guide] - RA channel ticks: 39 DEC channel ticks: 39
[2020-04-29T21:43:17.451 CDT DEBG ][ org.kde.kstars.ekos.guide] - Processing Axes
[2020-04-29T21:43:17.451 CDT DEBG ][ org.kde.kstars.ekos.guide] - At # 39 drift[ 0 ][ 39 ] = -0.553593 , t_delta: -0.553593
[2020-04-29T21:43:17.451 CDT DEBG ][ org.kde.kstars.ekos.guide] - delta [ 0 ]= -0.553593 <strong>
(this value is negative, so RA compensates by INCREASING - 3 lines below)
[/size]</strong>
[2020-04-29T21:43:17.451 CDT DEBG ][ org.kde.kstars.ekos.guide] - drift_integral[ 0 ]= -0.305018
[2020-04-29T21:43:17.451 CDT DEBG ][ org.kde.kstars.ekos.guide] - pulse_length [ 0 ]= 111
[2020-04-29T21:43:17.451 CDT DEBG ][ org.kde.kstars.ekos.guide] - Direction : Increase RA
[2020-04-29T21:43:17.452 CDT DEBG ][ org.kde.kstars.ekos.guide] - At # 39 drift[ 1 ][ 39 ] = 1.83406 , t_delta: 1.83406
[2020-04-29T21:43:17.452 CDT DEBG ][ org.kde.kstars.ekos.guide] - delta [ 1 ]= 1.83406 <strong>
(this value is positive, yet the DEC "correction" is further INCREASING it - 3 lines below)
</strong>
[2020-04-29T21:43:17.452 CDT DEBG ][ org.kde.kstars.ekos.guide] - drift_integral[ 1 ]= 2.06328
[2020-04-29T21:43:17.452 CDT DEBG ][ org.kde.kstars.ekos.guide] - pulse_length [ 1 ]= 250
[2020-04-29T21:43:17.452 CDT DEBG ][ org.kde.kstars.ekos.guide] - Direction : Increase DEC
The link to the full log is here:
www.dropbox.com/s/r9o9jl6wzr48iku/log_20-55-20.txt?dl=0
Has anyone else seen this behavior?
Am I missing something obvious and am I misinterpreting these numbers?
Topic Author
