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#540
by
Targeteer
on 02 Mar, 2023 20:58
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Anyone else curious why this flight has almost zero crew interaction with Hawthorne MCC? No in flight events, no views of the earth, etc. Did past crews object? The Russians?
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#541
by
ChrisC
on 02 Mar, 2023 21:27
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Reed: there are 3 switches per hook. 1 of the 36 switches was not indicating correctly. Not matching what other switches were saying. All hooks moved to redundant motor windings. Worked perfectly. Confident it’s just an issue with the one switch. Can ignore data from that. #Crew6
So the issue was with 1 out of 36 limit switches. Expect to move back to primary windings once Sara [sic, data] from bad switch ignored. Should be no issue for 6. month mission.
I would expect limit switches to be sensing the mechanical position of the hook. How does changing motors fix that? (if the issue is indeed the sensor and not the hook). If the sensor is on the motor and the hook can move differently than the motor (i.e. not a hard direct physical coupling) then the sensors are not really telling you anything? I'm sure the reality makes perfect sense, I'm just not understanding.
If you watch
the actual press conference, what Benji said was something like "there is logic to automatically go to backup string if something funny happens during the first attempt to open the nosecone". I wasn't clear to me if he meant "human logic / process" or "automated logic / software" but either way I read it as it just being the next thing they do if the mechanism acts weird at first.
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#542
by
jarmumd
on 02 Mar, 2023 22:13
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Reed: there are 3 switches per hook. 1 of the 36 switches was not indicating correctly. Not matching what other switches were saying. All hooks moved to redundant motor windings. Worked perfectly. Confident it’s just an issue with the one switch. Can ignore data from that. #Crew6
So the issue was with 1 out of 36 limit switches. Expect to move back to primary windings once Sara [sic, data] from bad switch ignored. Should be no issue for 6. month mission.
I would expect limit switches to be sensing the mechanical position of the hook. How does changing motors fix that? (if the issue is indeed the sensor and not the hook). If the sensor is on the motor and the hook can move differently than the motor (i.e. not a hard direct physical coupling) then the sensors are not really telling you anything? I'm sure the reality makes perfect sense, I'm just not understanding.
If you watch the actual press conference, what Benji said was something like "there is logic to automatically go to backup string if something funny happens during the first attempt to open the nosecone". I wasn't clear to me if he meant "human logic / process" or "automated logic / software" but either way I read it as it just being the next thing they do if the mechanism acts weird at first.
All sensors are redundant, so each hook has 3 sensors each with two switches for six total switches. Looks like they set it up where there is a complete package of primary/backup switches and motor windings. Might simplify control logic so you don't have to decide if a switch failure is real or not, you just switch from primary to backup.
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#543
by
mn
on 02 Mar, 2023 22:40
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Reed: there are 3 switches per hook. 1 of the 36 switches was not indicating correctly. Not matching what other switches were saying. All hooks moved to redundant motor windings. Worked perfectly. Confident it’s just an issue with the one switch. Can ignore data from that. #Crew6
So the issue was with 1 out of 36 limit switches. Expect to move back to primary windings once Sara [sic, data] from bad switch ignored. Should be no issue for 6. month mission.
I would expect limit switches to be sensing the mechanical position of the hook. How does changing motors fix that? (if the issue is indeed the sensor and not the hook). If the sensor is on the motor and the hook can move differently than the motor (i.e. not a hard direct physical coupling) then the sensors are not really telling you anything? I'm sure the reality makes perfect sense, I'm just not understanding.
If you watch the actual press conference, what Benji said was something like "there is logic to automatically go to backup string if something funny happens during the first attempt to open the nosecone". I wasn't clear to me if he meant "human logic / process" or "automated logic / software" but either way I read it as it just being the next thing they do if the mechanism acts weird at first.
Thanks, any idea where in the press conference this tidbit might be?
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#544
by
Targeteer
on 02 Mar, 2023 23:10
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nominal transfer burn complete
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#545
by
Targeteer
on 02 Mar, 2023 23:57
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co-elliptic burn complete
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#546
by
Targeteer
on 02 Mar, 2023 23:58
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range to ISS 57km
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#547
by
Targeteer
on 03 Mar, 2023 01:15
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I think I heard a link has been established between Dragon and ISS
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#548
by
Targeteer
on 03 Mar, 2023 01:31
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SPACE-X woke up the crew early because the timeline is running 30 minutes early
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#549
by
Targeteer
on 03 Mar, 2023 01:34
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tracking a possible leak in the toilet, I think. Mentioned of a possible burst something--started with p
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#550
by
Targeteer
on 03 Mar, 2023 01:37
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Rob Navias now on the feed. Docking now at 1243am Eastern with the timeline 34 minutes early
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#551
by
Targeteer
on 03 Mar, 2023 01:38
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30 km
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#552
by
Targeteer
on 03 Mar, 2023 01:47
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crew found no flow but did cap something
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#553
by
Targeteer
on 03 Mar, 2023 02:06
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24 km
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#554
by
Targeteer
on 03 Mar, 2023 02:08
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Navias drolling on endlessly about NASA TV coverage starting at the top of the hour. Why not start now?
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#555
by
Chinakpradhan
on 03 Mar, 2023 02:26
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NASA Eventbrite patch (this year colour code of paches is orange)
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#556
by
Targeteer
on 03 Mar, 2023 02:26
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Navias still talking endlessly about the start of NASA TV coverage..
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#557
by
Targeteer
on 03 Mar, 2023 02:39
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14 km. CAPCOM woke up Josh early with updates
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#558
by
yg1968
on 03 Mar, 2023 02:43
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Crew-6 Mission - Approach and Docking:
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#559
by
Targeteer
on 03 Mar, 2023 02:44
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go for approach initiation burn