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slice:z-n [2019/04/02 23:19] – [Table] Michael Radunskyslice:z-n [2022/07/18 17:18] (current) – external edit 127.0.0.1
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 [[https://en.wikipedia.org/wiki/Ziegler%E2%80%93Nichols_method|Wikipedia]])) is a simple method to establishing the loop parameter values for a PI or PID control loop. This protocol is designed to optimize the loop for disturbance rejection.\\  [[https://en.wikipedia.org/wiki/Ziegler%E2%80%93Nichols_method|Wikipedia]])) is a simple method to establishing the loop parameter values for a PI or PID control loop. This protocol is designed to optimize the loop for disturbance rejection.\\ 
 ==== Links ==== ==== Links ====
-Click here for the [[slice:qt|SLICE-QT Manual]].\\ +Click here for the [[slice:qt|SLICE-QTC Manual]].\\ 
-Click here for the [[slice:quick_start_qt|SLICE-QT Quick Start Guide]].\\ +Click here for the [[slice:quick_start_qt|SLICE-QTC Quick Start Guide]].\\ 
-Click here for the [[slice:qt:API|SLICE-QT API]].\\ +Click here for the [[slice:qt:API|SLICE-QTC API]].\\ 
-Click here for the [[https://www.vescent.com/products/electronics/slice/slice-qt-four-channel-temperature-controller/|SLICE-QT web page]].\\ +Click here for the [[https://www.vescent.com/products/electronics/slice/slice-qt-four-channel-temperature-controller/|SLICE-QTC web page]].\\ 
 +Click here for the [[https://github.com/Vescent|Github page for SLICE-QTC GUI]].\\ 
 +Click here for the [[https://github.com/Vescent/SLICE-QT-Firmware-Upgrade|Github page for SLICE-QTC firmware revisions]].\\ 
 +Click here for a [[https://youtu.be/jCuHNOW5q8c|Video Tutorial]].\\
 ==== Instructions ==== ==== Instructions ====
 <WRAP center round box 60%> <WRAP center round box 60%>
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   - Set Proportional Gain (K<sub>P</sub>) to 0   - Set Proportional Gain (K<sub>P</sub>) to 0
   - Turn off Integral and Differential portions of the loop (T<sub>I</sub> & T<sub>D</sub>, respectively)   - Turn off Integral and Differential portions of the loop (T<sub>I</sub> & T<sub>D</sub>, respectively)
-  - While monitoring the error in temperature on rolling graph on the SLICE-QT display or an  [[slice:qt#front-panel_inputs_outputs|external oscilloscope]], **slowly** increase K<sub>P</sub> until the error begins to oscillate+  - While monitoring the error in temperature on rolling graph on the SLICE-QTC display or an  [[slice:qt#front-panel_inputs_outputs|external oscilloscope]], **slowly** increase (~10% per increment) K<sub>P</sub> until the error begins to oscillate
   - Use the {{slice:graph_scale_x.gif}} and {{slice:graph_scale_y.gif}} icons, to scale displayed response appropriately   - Use the {{slice:graph_scale_x.gif}} and {{slice:graph_scale_y.gif}} icons, to scale displayed response appropriately
   - Use the {{slice:graph_pause.gif}} icon to pause the graph   - Use the {{slice:graph_pause.gif}} icon to pause the graph
-    - You can use the two rotary knobs or touch & drag the cursors on the touch screen +    - Note: the pause icon only pauses the graph, not the servo control 
-  - Note K<sub>P</sub> where oscillation begins, K<sub>P, cr</sub>+  - Note K<sub>P</sub> where oscillations of increasing amplitude begin; this is K<sub>P, cr</sub>, the critical proportional gain.
   - Use the Cursors enabled by touching the {{slice:cursors.gif}} icon to measure the period of oscillation, T<sub>cr</sub>   - Use the Cursors enabled by touching the {{slice:cursors.gif}} icon to measure the period of oscillation, T<sub>cr</sub>
 +        - You can use the two rotary knobs or touch & drag the cursors on the touch screen
   - Use the following table to set the values of K<sub>P</sub>, T<sub>I</sub>, and T<sub>D</sub>   - Use the following table to set the values of K<sub>P</sub>, T<sub>I</sub>, and T<sub>D</sub>
  
slice/z-n.1554247199.txt.gz · Last modified: 2021/08/26 14:26 (external edit)