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projects:spincoater:log [2026/01/18 21:24] – q3kprojects:spincoater:log [2026/01/18 21:25] (current) – q3k
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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 the hot plate for ~30 minutes. PMMA was not fully dissolved by time of use.+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. 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.+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. The following data is written down post-factum and shouldn't be relied upon until verified against video footage.
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 ^ Volume (uL) ^ Method  ^ ESC pulse time (uS) ^ Voltage ^ Notes ^  ^ Volume (uL) ^ Method  ^ ESC pulse time (uS) ^ Voltage ^ Notes ^ 
 | ~1500       | Dynamic | 1400                | 12      | {{:projects:spincoater:img_20260118_213055_612.jpg?linkonly|Photo}} Very uneven. | | ~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}} Spread fully, but center spot (initial solution location). |+| ~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. | | ~100        | Static  | 1100                | 10      | {{ :projects:spincoater:img_20260118_215414_548.jpg?linkonly|Photo}} Without center spot visible. |