d2:laser_servo
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d2:laser_servo [2019/01/29 21:56] – [Back-panel Section] Michael Radunsky | d2:laser_servo [2019/09/06 17:16] – [Right Side Panel] Michael Radunsky | ||
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Located at the top of the front panel, the monitor section contains 6 BNC outputs for monitoring various signals used by the Laser Servo. The logic of the monitors is shown in <imgref image1> | Located at the top of the front panel, the monitor section contains 6 BNC outputs for monitoring various signals used by the Laser Servo. The logic of the monitors is shown in <imgref image1> | ||
- | <WRAP center round box 420px>< | + | <WRAP center round box 420px>< |
**Error In** | **Error In** | ||
Line 185: | Line 185: | ||
**Auxiliary Servo Output** | **Auxiliary Servo Output** | ||
- | The AUXILIARY SERVO OUTPUT is generated from integrating the SERVO OUTPUT. | + | The AUXILIARY SERVO OUTPUT is generated from integrating the SERVO OUTPUT. |
**Ramp Offset** | **Ramp Offset** | ||
Line 243: | Line 243: | ||
===Auxiliary Servo: Gain (25-turn trimpot)=== | ===Auxiliary Servo: Gain (25-turn trimpot)=== | ||
- | This trimpot sets the gain for the AUXILIARY SERVO OUTPUT. The Aux Servo is a pure integrator and the gain ranges from 500 μs to 5 s. | + | This trimpot sets the gain for the AUXILIARY SERVO OUTPUT. The Aux Servo is a pure integrator and the gain ranges from 500 μs to 5 s. Full ccw sets gain to minimum (5 s), full cw sets gain to maximum (500 µs). |
<WRAP center round box 420px>< | <WRAP center round box 420px>< | ||
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** Ramp-> | ** Ramp-> | ||
- | This 2-position slider switch is only accessible by removing the right side panel (see above) and sets whether the ramp is applied to the SERVO OUTPUT or the AUXILIARY SERVO OUTPUT. It is factory set in the Ramp-> | + | This 2-position slider switch is only accessible by removing the right side panel (see above) and sets whether the ramp is applied to the SERVO OUTPUT or the AUXILIARY SERVO OUTPUT. It is factory set in the Ramp-> |
===Aux Gain: + / Aux Gain - (2-position switch)=== | ===Aux Gain: + / Aux Gain - (2-position switch)=== | ||
Line 271: | Line 271: | ||
**Ramp Master / Slave (Jumper)** | **Ramp Master / Slave (Jumper)** | ||
- | This jumper is only accessible by removing the right side panel (see above) and sets whether the ramp input is in master or slave mode. It is factory set to be in MASTER MODE. In SLAVE MODE (jumper off) the RAMP signal is generated externally and input through the back panel RAMP I/O port. In MASTER MODE (jumper on) the ramp is generated internally and is sent out to the RAMP I/O port for driving other D2-125 Laser Servos configured in SLAVE MODE. | + | This jumper is only accessible by removing the right side panel (see above) and sets whether the ramp input is in master or slave mode. It is factory set to be in MASTER MODE. In SLAVE MODE (jumper off) the RAMP signal is generated externally and input through the back panel RAMP I/O port. In MASTER MODE (jumper on) the ramp is generated internally and is sent out to the RAMP I/O port for driving other D2-125 Laser Servos configured in SLAVE MODE. |
+ | |||
+ | The slave ramp is multiplied by about -5x (at slave Ramp Amp maximum) from the master ramp input and then the DC offset is applied. | ||
====Lock Guard==== | ====Lock Guard==== | ||
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If you are having problems locking the laser, it is a good idea to not use the AUXILIARY SERVO OUTPUT as this complicates the system. Once you get the locking to work properly, you can reconnect this cable. | If you are having problems locking the laser, it is a good idea to not use the AUXILIARY SERVO OUTPUT as this complicates the system. Once you get the locking to work properly, you can reconnect this cable. | ||
- | <imgref factory_settings> | + | <imgref factory_settings> |
<WRAP center round box 400px>< | <WRAP center round box 400px>< | ||
- | {{ {{ d2:d2-125:factory_settings.jpg? | + | {{ {{ d2:d2-125:factory_settings_red.png? |
+ | |||
+ | <WRAP center round box 60%>< | ||
+ | | **Corner** | ||
+ | | First Integrator (high freq.) | ||
+ | | First Integrator (low freq.) | ||
+ | | Second Integrator (high freq.) | ||
+ | | Second Integrator (low freq.) | ||
+ | | Differential (high freq.) | ||
+ | | Differential (low freq.) | ||
+ | |||
+ | </ | ||
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d2/laser_servo.txt · Last modified: 2021/12/17 01:58 by 127.0.0.1