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projects:spincoater:log [2026/01/18 21:24] q3kprojects: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 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 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.
  
-^ Volume (uL) ^ Method  ^ ESC pulse time (uS) ^ Voltage ^ Notes ^  + Volume (µL) ^  Method    ESC pulse time (µs) ^  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. |