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<p class="MsoNormal">About 18 months ago we had one of the motors that drives the bottom optic on our EVG 620 aligner fail. As I understand it, there is a light switch that acts as a limit switch. For some reason, this failed, the motor drove itself into a
hard stop, overheated, and failed.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We had no root cause for this failure from the field service engineer. It was a difficult fix, and expensive.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Now it appears it may have occurred a second time. We are waiting for confirmation from EVG.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here is my question: I used a similar EVG 620 aligner at the U. Washington for years. I never heard of this being a problem. Has anyone else encountered a similar problem? If so, did you ever get a root cause and a fix?
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<p class="MsoNormal">Thanks you,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">Robert MacDonald</span><span style="color:#1F497D"><br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">MEMS Engineer<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">Microsystems</span><span style="color:#1F497D"><br>
</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">GE Global Research<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">1 Research Circle<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">Niskayuna, NY 12309<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">Office KWC-1629</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif;color:black"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F4E79">Cell 518 312-5646<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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