Microdiffractometer (MD2-S, MD3, MD3-UP) Motors¶

Micro Difractometers designed by EMBL and commercialised by ARINAX are used to perform crystallography experiments. In bliss their control is separated in two parts: motors and equipment. The configuration below only concerns motors.

![MD2-S] (img/md2s.png) ![MD3] (img/md3.png)

Some information about the device: https://www.embl.fr/instrumentation/cipriani/downloads/md2_pdf.pdf

Some troubleshooting on usage: https://www.esrf.eu/UsersAndScience/Experiments/MX/How_to_use_our_beamlines/Trouble_Shooting/id29-microdiffractometer-troubleshooting

Supported features¶

Encoder	Shutter	Trajectories
NO	NO	NO

Underlining Control¶

There is a java application, running on windows OS, which provides an API with Commands and Channels. Bliss is interfaced to this API via the Exporter Protocol - TCP/IP sockets communication, using ASCII request and replies.

Example YAML configuration file¶

controller:
  class: MD2
  exporter_address: "microdiff29new:9001"
  axes:
      -
        name: sampx
        root_name: "CentringX"
      -
        name: sampy
        root_name: "CentringY"
      -
        name: phix
        root_name: "AlignmentX"
      -
        name: phiy
        root_name: "AlignmentY"
      -
        name: phiz
        root_name: "AlignmentZ"

Configuration¶

The configuration yml file should provide those parameters:

class: always MD2
exporter_address: should contain hostname:port - the name of the computer where the java application runs and the socket port configured in the application.
axes should map name of each motor object in bliss with root_name defined by the API.

Usually the only parameter that needs to be changed is the exporter_address.