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docs: details on encoder reading of sgalilg controller

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e21206 2023-08-15 16:13:36 +02:00
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ophyd_devices/galil/sgalil_readme.md
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@ -70,6 +70,10 @@ f***ast axis***
- self.socket_put_and_receive('XQ#SAMPLE') # Reset encoder counting --> sampling starts with 0
Start scan (be aware, needs some waiting from before)
- self.socket_put_and_receive('XQ#SCANG')
for continuous readout of encoder:
### Encoder readings!
The encoder readout is triggered by an TTL pulse.
Unfortunately, TTL triggers to the encoder can only be accepted with at least 12.5ms time between rising/falling edges. Therefore, maximum readout has to be ~25Hz, rather 30Hz (experimentally determined).
Socket commands for the readout:
- self.socket_put_and_receive('MGsposct') # get current position counter
- self.socket_put_and_receive('MGaposavg[{ii%2000}]*10, cposavg[{ii%2000}]*10,')
- self.socket_put_and_receive('MGaposavg[{ii%2000}]*10, cposavg[{ii%2000}]*10,') # loop over ii