[labnetwork] 4-Wave Ion Beam PLC Code

[Rohit Khanna]

Hi Alexander,
                            Copying the code for the PLC may not be as easy as it seems....do you have a photograph of the PLC used?

Warm Regards
Rohit Khanna
Electronic Test & Measurement Engineer
London Centre for NANO Technology, UCL
Ph:+44-020-76799984
Lab: +44 20 3108 1516
Int Ext: 39984

________________________________
From: labnetwork <labnetwork-bounces at mtl.mit.edu> on behalf of Alexander Harper <amharper3 at crimson.ua.edu>
Sent: 26 February 2026 23:02
To: labnetwork at mtl.mit.edu <labnetwork at mtl.mit.edu>
Subject: [labnetwork] 4-Wave Ion Beam PLC Code

⚠ Caution: External sender


Hello all,
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.

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.

Best regards,
Jackson Turner and Alexander Harper
Undergrad Researchers
University of Alabama Micro Fabrication Facility
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