Getting Unstuck in West Valley |
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Getting Unstuck in West Valley |
 May 25 2009, 06:38 AM
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#226
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 Member  Group: Members Posts: 761 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200  |
QUOTE (nprev @ May 24 2009, 07:27 PM)  Sharp-eyed observation, Alan! I wonder if this was one of those wheel motor current tests; looks like it rotated just a couple of degrees at most. No, the rotor resistance tests are done so that the motor does not move so we do not have to keep into account the back EMF. These tests were done a few sols ago. This was a 4 degrees turn. The interesting thing to note is that the LM wheel seems to move down, possibly indicating that the LM was trying to overcome a step. Since none of the other wheels were providing (much) traction it is possible that the LM stalled because it was supporting all the weight of the vehicle. OK, I know I am speculating, but one can always dream! Paolo -------------------- Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
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May 25 2009, 10:23 AM
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#227
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 Senior Member Group: Moderator Posts: 2127 Joined: 9-February 04 From: UK Member No.: 16 |
Nice ones Alan & Ant, however I think adding the images from 1886 adds a certain something
  James -------------------- My MER & MSL Imagery site - Martian Vistas ---- Twitter Feed (including sol by sol updates on Opportunity's activity)
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May 25 2009, 11:25 AM
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#228
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Senior Member Group: Members Posts: 4521 Joined: 5-April 05 From: Canada Member No.: 227 |
Fantastic, James - but that's 'Braun' !
Phil -------------------- ... because the Solar System ain't gonna map itself.
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May 25 2009, 12:35 PM
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#229
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Senior Member Group: Moderator Posts: 2127 Joined: 9-February 04 From: UK Member No.: 16 |
Oops. Thanks Phil. Getting my Mars and F1 brains mixed up a bit...
-------------------- My MER & MSL Imagery site - Martian Vistas ---- Twitter Feed (including sol by sol updates on Opportunity's activity)
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May 25 2009, 12:39 PM
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#230
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Senior Member Group: Members Posts: 4521 Joined: 5-April 05 From: Canada Member No.: 227 |
You're lucky to have two brains! I'm making do with half of one over here.
Phil -------------------- ... because the Solar System ain't gonna map itself.
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May 25 2009, 12:46 PM
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#231
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 Senior Member Group: Members Posts: 3534 Joined: 1-October 05 From: Croatia Member No.: 523 |
I'll second that, superb work, James!
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May 25 2009, 07:40 PM
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#232
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Member Group: Members Posts: 279 Joined: 10-September 08 Member No.: 4338 |
QUOTE (SFJCody @ May 23 2009, 04:29 AM) Looks like Richard Hendricks's driving at night idea is the kind of thing the MER team are considering (according to the recent npr podcast). I missed his post when skimming through the thread on wednesday which is why I posted the same idea on a previous page.  Also suggested here: http://www.unmannedspaceflight.com/index.p...st&p=140329 |
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May 25 2009, 08:01 PM
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#233
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 Member Group: Members Posts: 745 Joined: 8-February 04 Member No.: 12 |
QUOTE (marsophile @ May 25 2009, 08:40 PM) Arrgh, don't know how I missed that! Sorry!
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May 26 2009, 02:29 PM
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#234
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 Senior Member Group: Members Posts: 1620 Joined: 20-November 04 From: Iowa Member No.: 110 |
A suggestion: try sending power to the right front wheel, see if anything happens.
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May 26 2009, 03:02 PM
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#235
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 Member Group: Members Posts: 158 Joined: 4-July 05 From: West Chester, PA, USA Member No.: 429 |
QUOTE (jamescanvin @ May 25 2009, 05:23 AM) Nice ones Alan & Ant, however I think adding the images from 1886 adds a certain something Can it be a broken up meteorite in the bottom right corner?
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May 26 2009, 06:53 PM
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#236
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 Administrator Group: Chairman Posts: 13250 Joined: 8-February 04 Member No.: 1 |
They don't really look like the ones we've seen before.
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May 26 2009, 09:02 PM
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#237
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Member Group: Members Posts: 761 Joined: 29-September 06 From: Pasadena, CA - USA Member No.: 1200 |
QUOTE (alan @ May 26 2009, 07:29 AM) A suggestion: try sending power to the right front wheel, see if anything happens. Believe it or not, that is actully already on the list of things to try, but not at the top. Since the motor controllers are shared between various devices, trying to send power down a line which might be shorted could cause damage to other components of the vehicle. In addition, and this might be stating the obvious, one advantage of not turning the RF wheel is that it won't sink! And in the current predicament it is quite helpful. Paolo -------------------- Disclaimer: all opinions, ideas and information included here are my own,and should not be intended to represent opinion or policy of my employer.
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May 26 2009, 09:24 PM
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#238
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Senior Member Group: Members Posts: 4521 Joined: 5-April 05 From: Canada Member No.: 227 |
The "broken up meteorite" fragments are more likely bits of the coarse-grained layer at the base of the Home Plate layered unit. It was seen when we first got to HP, and it's here too , just above the rover.
Phil -------------------- ... because the Solar System ain't gonna map itself.
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May 27 2009, 12:09 PM
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#239
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 Senior Member Group: Members Posts: 1114 Joined: 12-February 06 From: Marseille - FR Member No.: 678 |
QUOTE (jamescanvin @ May 25 2009, 12:23 PM) Nice ones Alan & Ant, however I think adding the images from 1886 adds a certain something http://www.nivnac.co.uk/mer/images/A1886_8_HP_VB_thumb.jpg James Yes, it adds James, excellent picture  .I have take the time to add the certain something  
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May 28 2009, 01:51 AM
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#240
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Member Group: Members Posts: 236 Joined: 27-April 05 Member No.: 365 |
Power up over 800 w/h now.....any clue if these are straight-line winds or direct hits by dust devils or what?
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