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piezo_3rd_party [2016/09/07 15:26]
asiadmin ↷ Page moved from documentation:piezo_3rd_party to piezo_3rd_party
piezo_3rd_party [2016/09/07 08:29] (current)
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 ASIs Drive Electronics for Piezo Topplate (ADEPT) and actuators can drive and control 3rd party piezo stages and actuators with little or no modifications. ​ The card is actuator agnostic and needs only a single factory calibration to be paired with an actuator. ASIs Drive Electronics for Piezo Topplate (ADEPT) and actuators can drive and control 3rd party piezo stages and actuators with little or no modifications. ​ The card is actuator agnostic and needs only a single factory calibration to be paired with an actuator.
  
-{{ :​documentation:​adept_block.png?​direct&​300 |ADEPT card block diagram}}+{{ adept_block.png?​direct&​300 |ADEPT card block diagram}}
  
 ===== Features ===== ===== Features =====
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 The Frequency response of the ADEPT card connected in parallel to three piezo stacks of 3uF i.e.  9uF is shown below. When driving higher capacitive loads, expect the frequency response of the ADEPT card to be lower. ​ The Frequency response of the ADEPT card connected in parallel to three piezo stacks of 3uF i.e.  9uF is shown below. When driving higher capacitive loads, expect the frequency response of the ADEPT card to be lower. ​
    
-{{ :​documentation:​adept_manual_1_.png?​direct&​300 |}} +{{ adept_manual_1_.png?​direct&​300 |}} 
    
    
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 The ADEPT card uses resistive strain gauges for positional feedback of the actuator. The card expects the strain gauges to be in half bridge configuration. One strain gauge flexing connected to pin 4, another unflexing or counter strained connected to Pin 5, and both the strain gauges connected to pin 3 of the ADEPT cards DB9 connector. The flexing strain gauge should be installed in such a way that it experiences a change in mechanical strain as the piezo stack expands and contracts. The unflexing should be installed close to the flexing strain gauge but in such a way it is immune to any change in mechanical strain or it sees the counter strain experienced by the flexing strain gauge as the piezo stack travel.  ​ The ADEPT card uses resistive strain gauges for positional feedback of the actuator. The card expects the strain gauges to be in half bridge configuration. One strain gauge flexing connected to pin 4, another unflexing or counter strained connected to Pin 5, and both the strain gauges connected to pin 3 of the ADEPT cards DB9 connector. The flexing strain gauge should be installed in such a way that it experiences a change in mechanical strain as the piezo stack expands and contracts. The unflexing should be installed close to the flexing strain gauge but in such a way it is immune to any change in mechanical strain or it sees the counter strain experienced by the flexing strain gauge as the piezo stack travel.  ​
  
-{{ :​documentation:​adept_3rd_2_.jpg?​direct&​300 |}} +{{ adept_3rd_2_.jpg?​direct&​300 |}} 
    
 The strain gauge conditioning circuit on the ADEPT card applies a current of 1ma to 2ma on both the strain gauges. As the gauges are electrically resistive in nature they develop a voltage, this voltage is applied to a differential instrumentation amplifier and the voltage put out by the amplifier is proportional to the difference in strain between the flexing and unflexing strain gauges, ​ thus the position of the actuator can be calculated. ​ The strain gauge conditioning circuit on the ADEPT card applies a current of 1ma to 2ma on both the strain gauges. As the gauges are electrically resistive in nature they develop a voltage, this voltage is applied to a differential instrumentation amplifier and the voltage put out by the amplifier is proportional to the difference in strain between the flexing and unflexing strain gauges, ​ thus the position of the actuator can be calculated. ​
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 Please refer to the piezo card's user manual on how to use the [[commands:​pzc|PZC command]]. ​ Please refer to the piezo card's user manual on how to use the [[commands:​pzc|PZC command]]. ​
    
-Refer to the [[documentation:​piezo_3rd_party#​Setting Strain Gauge Manually|Setting Strain Gauge Manually]] section to find how to adjust strain gauge manually. ​+Refer to the [[piezo_3rd_party#​Setting Strain Gauge Manually|Setting Strain Gauge Manually]] section to find how to adjust strain gauge manually. ​
    
 ==== Setting Feedback Gain ==== ==== Setting Feedback Gain ====
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 This setting must be set at the factory as it requires additional equipment. ​ Once set ,the gain is saved in a non volatile memory onboard the card.  This setting must be set at the factory as it requires additional equipment. ​ Once set ,the gain is saved in a non volatile memory onboard the card. 
    
-Refer to the [[documentation:​piezo_3rd_party#​Setting Strain Gauge Manually|Setting Strain Gauge Manually]] ​ section to find how to adjust this manually. ​+Refer to the [[piezo_3rd_party#​Setting Strain Gauge Manually|Setting Strain Gauge Manually]] ​ section to find how to adjust this manually. ​
   ​   ​
 ==== Strain Gauge non Linearity Compensation ==== ==== Strain Gauge non Linearity Compensation ====
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 The position of the screw potentiometer depends on the range of mechanical strain the strain gauge might experience, once this setting has been deduced for an actuator it can be applied to other ADEPT cards that will be paired with similar actuators too.  The position of the screw potentiometer depends on the range of mechanical strain the strain gauge might experience, once this setting has been deduced for an actuator it can be applied to other ADEPT cards that will be paired with similar actuators too. 
  
-{{ :​documentation:​adept_3rd_3_.jpg?​direct&​300 |}}+{{ adept_3rd_3_.jpg?​direct&​300 |}}
    
 === Adjustable Error Amp Gain (only in ADEPT Rev L2+) === === Adjustable Error Amp Gain (only in ADEPT Rev L2+) ===
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 Graph below shows the change in frequency response. Graph below shows the change in frequency response.
  
-{{ :​documentation:​adept_manual_1_.png?​direct&​300 |}}+{{ adept_manual_1_.png?​direct&​300 |}}
    
-Refer to [[documentation:​tech_note_changing_piezo_drive_card_fast_slow_compensation|TN147:​ Changing Piezo Drive Card'​s ​ Fast Slow Compensation]] ​+Refer to [[tech_note_changing_piezo_drive_card_fast_slow_compensation|TN147:​ Changing Piezo Drive Card'​s ​ Fast Slow Compensation]] ​
  
 ===== Setting Strain Gauge Manually ===== ===== Setting Strain Gauge Manually =====
piezo_3rd_party.txt · Last modified: 2016/09/07 08:29 (external edit)