https://pfspipe.ipmu.jp/jira This file is an XML representation of an issue en-us 8.3.4 803005 13-09-2019 https://pfspipe.ipmu.jp/jira/browse/INSTRM-1490 Instrument control development <p>During the November engineering run, we did the convergence test at different EL angles.  However, we see the strange phenomenon in visitID=69990.  As you can see from plot, the 12th iteration is not the best result.  We need to investigating the reason.  </p> INSTRM-1490

Solving why Nov convergence tests showed inconsistent numbers in different iteration

Task Normal Done Done chyan chyan EngRun Wed, 15 Dec 2021 16:57:34 +0000 Fri, 11 Feb 2022 02:52:49 +0000 Sun, 23 Jan 2022 13:42:21 +0000 0 3 <p>We select cobra ID 1400 as our example.</p> <p><span class="image-wrap" style=""><a id="14532_thumb" href="https://pfspipe.ipmu.jp/jira/secure/attachment/14532/14532_Figure+1-8.png" title="Figure 1-8.png" file-preview-type="image" file-preview-id="14532" file-preview-title="Figure 1-8.png"><img src="https://pfspipe.ipmu.jp/jira/secure/thumbnail/14533/_thumb_14533.png" style="border: 0px solid black" /></a></span></p> <p> In the following plot, we see the cobra steps are zero after the cobra reaches the 10 micron area.  </p> <p><span class="image-wrap" style=""><a id="15066_thumb" href="https://pfspipe.ipmu.jp/jira/secure/attachment/15066/15066_Figure+1-19.png" title="Figure 1-19.png" file-preview-type="image" file-preview-id="15066" file-preview-title="Figure 1-19.png"><img src="https://pfspipe.ipmu.jp/jira/secure/thumbnail/14532/_thumb_14532.png" style="border: 0px solid black" /></a></span></p> <p>Therefore, we are certain that the cobra is not moving when it reaches the targets.  </p> <p>In formal telecon on 17 Dec. Chi-Hung will check FF fiber positions to see if it is seeing effect or not.</p> <p> In this file <span class="nobr"><a href="https://pfspipe.ipmu.jp/jira/secure/attachment/15065/15065_69990.pdf" title="69990.pdf attached to INSTRM-1490">69990.pdf^{<img class="rendericon" src="https://pfspipe.ipmu.jp/jira/images/icons/link_attachment_7.gif" height="7" width="7" align="absmiddle" alt="" border="0"/>}</a></span>, I plotted the variation of FF. As we can see, there are frame-by-frame effect in FFs. Therefore, I did the same test on test bench. The results showed that the number of converged fibers are consistent with previous tests. This suggested that the frame-by-frame correction is needed. <span class="image-wrap" style=""><a id="15066_thumb" href="https://pfspipe.ipmu.jp/jira/secure/attachment/15066/15066_Figure+1-19.png" title="Figure 1-19.png" file-preview-type="image" file-preview-id="15066" file-preview-title="Figure 1-19.png"><img src="https://pfspipe.ipmu.jp/jira/secure/thumbnail/15066/_thumb_15066.png" style="border: 0px solid black" /></a></span> </p> <p><a href="https://pfspipe.ipmu.jp/jira/secure/ViewProfile.jspa?name=chyan" class="user-hover" rel="chyan">chyan</a> will close this ticket and file a new ticket to cover the frame-by-frame and first frame only methods.</p> Relates INSTRM-1506 INSTRM-1498 Development Rank 0|02qpuc:i6001gr068fhw9qo4o0ry8r Sprint PreEngRun05 A PreEngRun05 B Story Points 6.0