d2:laser_servo
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d2:laser_servo [2019/07/15 22:50] – [Laser Lock Troubleshooting] Michael Radunsky | d2:laser_servo [2019/10/24 16:39] – [Lock Guard] 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 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 amplitude of the slave ramp is about -5x of the master ramp input (at slave Ramp Amp maximum). | ||
====Lock Guard==== | ====Lock Guard==== | ||
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<WRAP center round box 400px> | <WRAP center round box 400px> | ||
| **C** | **B** | **A** | ** Hold Time** | | **C** | **B** | **A** | ** Hold Time** | ||
- | |0ff|0ff|0ff| 60 µs | 150 µs | | + | |Off|Off|Off| 60 µs | 150 µs | |
- | |0ff|0ff|0n| 125µs | + | |Off|Off|On| 125µs |
- | |0ff|On|0ff| 250 µs | 600 µs | | + | |Off|On|Off| 250 µs | 600 µs | |
- | |0ff|0n|0n| 500 µs | 1.25 ms | | + | |Off|On|On| 500 µs | 1.25 ms | |
- | |0n|0ff|0ff| 1 ms | 2.5 ms | | + | |On|Off|Off| 1 ms | 2.5 ms | |
- | |0n|0ff|0n| 2 ms | 5 ms | | + | |On|Off|On| 2 ms | 5 ms | |
- | |0n|On|0ff| 4 ms | 10 ms | | + | |On|On|Off| 4 ms | 10 ms | |
- | |0n|0n|0n| 8 ms | 20 ms | | + | |On|On|On| 8 ms | 20 ms | |
</ | </ | ||
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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: |
+ | |||
+ | <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