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piezo_manual [2018/06/20 11:00]
vik
piezo_manual [2019/02/22 12:11] (current)
vik [External Input and Output]
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 ===== External Input and Output ===== ===== External Input and Output =====
  
-Apart from using the ADEPT card to position the piezo top-plate through the controller, this card can also get positioning information through ​0-10V analog signal. ​+The position ​of the piezo can also be set with a 0-10V analog signal. ​
  
-When the controller is set to external input mode (using the [[commands:​pz|PZ ​command]] or [[commands:​pm|PM [axis] command]] ADEPT positions the piezo top-plate based on the voltage applied to** EXT IN** or external input. The analog signal should be between 0 to 10 volts, where 10 represents lower limit, and 0 volts represents ​higher ​limit. For every 1 volt change, the piezo top-plate changes ​ ​\begin{equation} \frac{1}{10}\end{equation} ​  the piezo range. Example, if it’s a 150um piezo top-plate 1 volt represents 15um, 0.1 volt represents 1.5um. We recommend that frequency of the signal be kept less than 10Hz for long moves, so as to give the piezo top-plate time to settle down and come to a complete stop.+When the controller is set to external input mode (using the [[commands:​pz|PZ ​Z=1]] command ​(for holding down @ button for 6 seconds)controller ​positions the piezo-based on the voltage applied to** EXT IN** or external input. The analog signal should be between 0 to 10 volts, where 10 represents lower limit, and 0 volts represents ​upper limit. For every 1 volt change, the piezo top-plate changes ​one tenth the piezo range. Example, if it’s a 150um piezo top-plate 1 volt represents 15um, 0.1 volt represents 1.5um. We recommend that the frequency of the signal be kept less than 10Hz for long moves, so as to give the piezo top-plate time to settle down and come to a complete stop.
  
-Sensor Out is a 0 to 10 volt analog signal that corresponds to position of the piezo top-plate. ​ It is a buffered output of the strain gauge sensors. ​+Sensor Out is a 0 to 10 volt analog signal that corresponds to the position of the piezo top-plate. ​ It is a buffered output of the strain gauge sensors. ​
  
 ===== TTL or GPIO ===== ===== TTL or GPIO =====
piezo_manual.txt · Last modified: 2019/02/22 12:11 by vik