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Hi Alexander,</div>
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Copying the code for the PLC may not be as easy as it seems....do you have a photograph of the PLC used?</div>
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Warm Regards</div>
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Rohit Khanna</div>
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Electronic Test & Measurement Engineer</div>
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London Centre for NANO Technology, UCL</div>
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Ph:+44-020-76799984</div>
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<span style="font-family: "Freestyle Script"; font-size: 18pt; color: rgb(33, 33, 33);">Lab:
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Int Ext: 39984</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> labnetwork <labnetwork-bounces@mtl.mit.edu> on behalf of Alexander Harper <amharper3@crimson.ua.edu><br>
<b>Sent:</b> 26 February 2026 23:02<br>
<b>To:</b> labnetwork@mtl.mit.edu <labnetwork@mtl.mit.edu><br>
<b>Subject:</b> [labnetwork] 4-Wave Ion Beam PLC Code</font>
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<div class="PlainText">⚠ Caution: External sender<br>
<br>
<br>
Hello all,<br>
We at the University of Alabama Micro Fabrication Facility have run into an issue in which the plc program on our 4-Wave 840Q44 Ion Beam Etching System has been wiped. While we’ve fixed the issue, we do not have a copy of the program that was on the PLC. We’re
reaching out to see if anyone might have this machine and can download the code from the PLC, happens to have a drive laying around with the code on it, or can offer any other form assistance.<br>
<br>
Additionally, we have a Veeco Dektak V-220 Si that is having issues with the LVDT sensor. We are seeing no changes in the raw readout through the software, even after adjusting the z micrometer. If anyone can help us with this, we would greatly appreciate it.<br>
<br>
Best regards,<br>
Jackson Turner and Alexander Harper<br>
Undergrad Researchers<br>
University of Alabama Micro Fabrication Facility<br>
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