Date: Wed, 31 Jan 2018 23:36:29 +0000
From: Jon Brinkmann
Subject: Re: [sloan-25mlog 3861] 2.5m obslog 20180130 (SJD 58149)
I take it that the MOVE commands shown below came from the TCC?
If so, its the problem.
On Wed, Jan 31, 2018 at 01:21:37PM +0000, doravetz@apo.nmsu.edu wrote:
>
>                        APACHE POINT OBSERVATORY SDSS 2.5M
>
>                                  OBSERVING LOG
>                           Tuesday January 30, 2018
>
>                                   (SJD 58149)
...
> ---- Problems in Detail ----
>
> Afternoon altitude slew past 90
> ===============================
> Here the telescope is commanded to az=101, alt=90, rot=15.
>
> 2018-01-30 23:41:51.572 info  TCC25mActor(tcc25m).newCmd('671703 track 101, 90
> mount /rota=15 /rotty=mount')
> 2018-01-30 23:41:51.578 info  UserCmd('671703 track 101, 90 mount /rota=15
> /rotty=mount', state=running)
> 2018-01-30 23:42:18.607 info  UserCmd('671703 track 101, 90 mount /rota=15
> /rotty=mount', state=done, hubMsg='SlewEnd')
> 2018-01-30 23:42:18.607 info  TCC25mActor(tcc25m) UserCmd('671703 track 101, 90
> mount /rota=15 /rotty=mount', state=done, hubMsg='SlewEnd')
>
> Below are the MCP 'MOVE' commands associated with the slew to az=101, alt=90,
> rot=15. Note that the MOVE commands for altitude are moves to altitudes > 90
> degrees with nonzero positive slew velocities, but then those are followed by
> 'MOVE' commands back to 90 degrees. Once the altitude axis had reached 91+
> degrees, it didn't move back to 90 despite the 'MOVE' commands -- it may have
> tried to move back, but bumped into the wind baffle and recoiled back.
>
> 2018-01-30 23:41:52.163 \x000\x00aAZ MOVE 120.9999990 0.0000000 85315.58145
> 2018-01-30 23:41:52.323 \x000\x00aROT MOVE 15.0000200 0.0000000 85315.58145
> 2018-01-30 23:41:52.482 \x000\x00aALT MOVE 90.5167164 0.3203220 85315.58145
> 2018-01-30 23:41:52.643 \x000\x00aAZ MOVE 120.9666657 -0.1000000 85316.58145
> 2018-01-30 23:41:52.803 \x000\x00aROT MOVE 15.0000000 0.0000000 85316.83145
> 2018-01-30 23:41:52.963 \x000\x00aALT MOVE 90.8237051 0.2803220 85316.58145
> 2018-01-30 23:41:53.123 \x000\x00aAZ MOVE 112.8691646 -1.8024984 85325.09394
> 2018-01-30 23:41:53.283 \x000\x00aROT MOVE 15.0000000 0.0000000 85336.60643
> 2018-01-30 23:41:53.443 \x000\x00aALT MOVE 90.9329397 -0.2471900 85323.17535
> 2018-01-30 23:41:53.603 \x000\x00aAZ MOVE 110.9999995 -1.9024984 85326.09394
> 2018-01-30 23:41:53.842 \x000\x00aALT MOVE 90.6590830 -0.2871900 85324.17535
> 2018-01-30 23:41:54.003 \x000\x00aAZ MOVE 109.1308344 -1.8024984 85327.09394
> 2018-01-30 23:41:54.243 \x000\x00aALT MOVE 90.3852264 -0.2471900 85325.17535
> 2018-01-30 23:41:54.403 \x000\x00aAZ MOVE 101.0333333 -0.1000000 85335.60643
> 2018-01-30 23:41:54.643 \x000\x00aALT MOVE 90.0133333 -0.0400000 85327.76522
> 2018-01-30 23:41:54.803 \x000\x00aAZ MOVE 101.0000000 0.0000000 85336.60643
> 2018-01-30 23:41:55.042 \x000\x00aALT MOVE 90.0000000 0.0000000 85328.76522
> 2018-01-30 23:41:55.283 \x000\x00aALT MOVE 90.0000000 0.0000000 85336.60643
>
> ** Where are those 'MOVE' commands to alt>90 coming from?
>
> ____________________________________________________________
> Logs of Nightly APO Activities
> https://trac.sdss.org/tracmailman/browser/private/sloan-25mlog/index.html