Bug Hunting

  • MSIM failed again after target run with newly generated targets.
  • Positioner 41 had a calculated angle of 418
  • We found a new case for Hrands state machine but it is not easy to determine reality without longer history. (Positioner may be stuck or overshooting massively, can be the same).
  • Code that handles large angles beyond mmap values worked but then 0 steps commanded triggered a search algorithm for looking which 1 step move brings us closer to the target.
  • This search then needs to lookup mmap and fails because it can't find it.
  • Hrand will implement a error catch setting step sizes to 0.
  • The region issue will be handled by ignoring the positioner for that run.
  • From the test data several positioners show stickiness:
  • pid 53 has clear interaction of flex print with neighbour

Cold Test EM RAIL LOG

COBRA RAIL Board INVERTED Current Performance
  POSITION POSITION MSIM ID SNR@iter[date]
EM1 121 01 01 no 1 BROKEN @ [15_03_28_22_51_02_TargetRun] prev. SNR [0.970] @ 15_03_23_11_46_32 Stage 1 moves very slowly. broken with no sound from motor 1 anymore.
EM1 117 02 02 no 3  
EM1 105 03 03 no 5 weird behaviour, bad center/link lengths
EM1 123 04 04 no 7  
EM1 109 05 05 no 9 NOT RUNNING. Stage 2 does not move. It looks like it is contacting the Stage 2 housing, which might cause too much drag.
EM2 141 06 06 no 11  
EM2 152 07 07 no 13 Stage 2 does not engage the hard stop and does not move reliably
EM2 145 08 08 no 15  
EM2 151 09 09 no 17 SNR [1.023] @ 15_03_19_11_03_04
EM2 143 10 10 no 19  
EM2 150 11 11 no 21 SNR [1.001] @ 15_03_23_11_46_32
EM2 146 12 12 no 23  
EM2 149 13 13 no 25 SNR [1.023] @ 15_03_23_11_46_32 Stage 2 does not engage hard stop
EM1 101 14 14 yes 27 Stage 2 does not move. Potentially an issue with the electrical connection.
EM1 108 15 15 no 29 SNR [1.007] @ 15_03_19_11_03_04 ; Got more and more stuck on stage 2, have to increase ontime (4/10)
EM1 104 16 n/a yes   REMOVED FROM MODULE ON 11/19/2014 AND RETURNED TO NST
EM1 102 17 17 yes 33 SNR [1.021] @ 15_03_19_11_03_04 - broken with no sound from motor anymore. BROKEN @ [15_03_28_22_51_02_TargetRun] ALIVE @ [15_03_30_TargetRun]
EM2 144 18 18 no 35  
EM2 142 19 19 no 37 SNR [1.009] @ 15_03_19_11_03_04; 37 has an increasing sticky spot at 100 and 300 deg and is fast at 200 deg. This makes it almost impossible to reach targets in between. (analyzed on 4/10 after the last target run 4/8)
EM1 118 20 20 no 39  
EM1 122 21 21 no 41 High forward ontime. Spread out mmap. Potentially bad positioner.
EM1 103 22 22 yes 43  
EM1 116 23 23 no 45 SNR [1.027] @ 15_03_19_11_03_04
EM2 147 24 24 no 47  
EM1 112 25 25 no 49 SNR [1.007] @ 15_03_23_11_46_32
EM1 106 26 28 no 51  
EM1 110 27 29 no 53 Flex Interference from manual inspection
NONE 28 n/a      

-- JohannesGross - 23 Mar 2015

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Topic revision: r8 - 2015-04-10 - JohannesGross
 
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