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projects:spincoater:log [2026/01/18 20:25] – created rahixprojects:spincoater:log [2026/01/18 21:25] (current) – q3k
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 ==== Day 2026-01-18 (q3k, rob, hugo, rahix) ==== ==== Day 2026-01-18 (q3k, rob, hugo, rahix) ====
 +first prototype of spincoater hardware:
 +
 +{{: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 (uL) ^ Method  ^ ESC pulse time (uS) ^ 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. |