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projects:spincoater:log [2026/01/18 20:27] – [Day 2026-01-18 (q3k, rob, hugo, rahix)] rahixprojects:spincoater:log [2026/03/10 23:23] (current) – [Day 2026-01-18 (q3k, rob, hugo, rahix)] rahix
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 {{:projects:spincoater:pxl_20260118_200953672.jpg?400|}} {{:projects:spincoater:pxl_20260118_200953672.jpg?400|}}
 +
 +An unknown quantity of PMMA was added to an unknown quantity of acetone. Solution was refluxed at 50 degrees on a hot plate for ~30 minutes. PMMA was not fully dissolved by time of use.
 +
 +A micropipette was used to dispense the PMMA/Acetone solution on a test setup without RPM feedback.
 +
 +Variable space was explored semi-arbitrarily. Spin time was around 10s. Acceleration was controlled by the ESC.
 +
 +The following data is written down post-factum and shouldn't be relied upon until verified against video footage.
 +
 +^  Volume (µL) ^  Method    ESC pulse time (µs) ^  Voltage ^ Notes ^ 
 +|        ~1500 |  Dynamic  |                 1400 |       12 | {{:projects:spincoater:img_20260118_213055_612.jpg?linkonly|Photo}} Very uneven. |
 +|         ~100 |  Static                   1100 |       12 | {{ :projects:spincoater:img_20260118_215040_809.jpg?linkonly|Photo}} Center spot visible (initial solution location). |
 +|         ~100 |  Static                   1100 |       10 | {{ :projects:spincoater:img_20260118_215414_548.jpg?linkonly|Photo}} Without center spot visible. |