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Von Hamos 16 crystal

Warning: the controls for this device are a mess...

This device is also used at XPP. It has 2 main axis:

  • Rotation: dumb motor
  • Translation: Parker linear stage with its own Beckhoff PLC rail (yes...)

There is also controls for all single crystals, but we generally don't connect those.

Rotation stage control

This stage is controlled as a regular dumb motor. It can be controlled from the vonHamos - X & Rot button.

Translation stage controls

Because the device is shared with xpp, its IOC runs on the LFE subnet and can be found in the XRT IOCs. The IOC is ioc-hxx-vonhamos (alias von Hamos Y motion).

Also, the PLC does not have a license (why?) and so its trial must be refreshed after 7 days. Otherwise it will just boot in config mode and will not run. The trial expires after 7 days, and must then be refreshed. Note that if the PLC is left running, it'll keep working, even after 7 days, but it won't be possible to reboot it. Refreshing the trial is done from the PLC programming node. Hopefully a license will be installed soon.

The screen for this stage is under VerySmall VonHamos? - Y in the user panel.

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