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Entry  Fri Jan 4 15:11:28 2013, Jenne, Update, , TT 
    Reply  Mon Jan 14 15:15:04 2013, Jenne, Update, , TT TT2_stuck_unstuck_14Jan2013.png
       Reply  Mon Jan 14 19:56:48 2013, Manasa, Update, , TT 
          Reply  Tue Jan 15 01:41:40 2013, rana, Update, SUS, TT 
    Reply  Thu Feb 21 13:34:35 2013, Jenne, Update, Treasure, IR card removed 
Message ID: 7898     Entry time: Mon Jan 14 15:15:04 2013     In reply to: 7876     Reply to this: 7899
Author: Jenne 
Type: Update 
Category:  
Subject: TT 

 

[Manasa, Jenne]

First plug in only one of the quadrupus cables, find out what coil it corresponds to according to screen, then plug in 2nd cable, don't test already-determined cable, but all other 3, find what cable it corresponds to according to the screen.  Repeat for other 2 cables.

TT2, confirmation:

C = LL, not UR, not UL, not LR

D = UL, not UR, not LR

A = LR, not UR

B = UR

 

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After confirming that the correct quadrupus cables were plugged in to the correct coils, I suspected that our problems could be coming from a (or some) magnet(s) touching the inside of the OSEM.  We tested this a little bit, with the goal of finding the range of values where no magnets are touching.

All matrix values are either +1000 or -1000, so, with an example pitch slider value :

                       PIT    YAW

Pit slider           |  1000   1000  | --->  -22000 UL

     -22.2           | -1000   1000  | --->  +22000 LL

Yaw slider           |  1000  -1000  | --->  -22000 UR

    0                | -1000  -1000  | --->  +22000 LR

 

 

Trying some values for pitch, keeping yaw constant:

0 yaw, Pitch bias = 5 -> UR is touching on left side of its osem.

0 yaw, Pitch 0, UR is touching left side.

0 yaw, -1.2 pitch, UR just came off from touching left side.  More neg from here should be non-touching.  all others are fine.

0 yaw, -32.2 pitch, LR not quite touching right side of osem, but is close (much less than 1mm clearance).  UR fine. all others fine.

0 yaw, -22.2 pitch, all 4 are fine.

 

Trying some yaw values, keeping pitch constant:

1.  -22.2 pitch, -32 yaw, LR touching. UR touching.

2.  -22.2 pitch, -12 yaw, LR barely not touching, UR still touching.

3.  -22.2 pitch, 0 yaw, UR still touching.

4.  -22.2 pitch, 16 UR barely not touching.

5.  -22.2 pitch, 32, none touching.

6.  -22.2 pitch, 12, UR close, not touching.

7.  -22.2 pitch, 0, UR touching.

8.  -22.2 pitch, 32 (or 30?) UR came off.

9.  -22.2 pitch, -25, UR close

10.  -22.2 pitch, -32 UR touching.

11.  -22.2 pitch, -4 UR not touching.

12.  -22.2 pitch, 0 yaw, UR not touching.

 

Here is a graphical semi-representation for the yaw data:

 TT2_stuck_unstuck_14Jan2013.png

 

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