Collecting data
Data collection and motor control are managed using NOMAD.
Choose the Execution tab in the left-hand panel of NOMAD. The Launch pad will appear in the right-hand panel.
A number of menu options will appear. The important options are:
- Commands : Acquisition : Counts : Count for data collection
- Commands : Axis : Sample gives access to the motors omega, tilt1 and tilt2 on the sample table.
- Commands : Users' scripts : Shared : Home which drives omega, tilt1 and tilt2 to zero.
Double-click the options, or click-and-drag them to the Launch pad, to create a playlist.
Double-click the options under the Execution tab, or click-and-drag them to the Launch pad, to create a playlist.
Feel free to modify the fields in the commands on the Launch pad for titles, count times, motor positions, etc.
Example of a 'Count' playlist
- Find the Count command under Commands : Acquisition : Counts
- Double click, or click-and-drag the command to the Launch pad
- Change the subtitle and count time to your wishes
- Be sure to check the Save data button!
Your Launch pad should look something like this:
Example of a more complicated playlist
You can place any number of consecutive commands onto the playlist, moving motors and counting as you choose.
Execute the playlist by clicking the Play button (►) in the bottom right of the NOMAD screen.
The playlist may be Paused ( ⏸ ) or Stopped (■) by clicking on the appropriate buttons in the bottom right of the NOMAD screen.
If a playlist is paused, press Pause ( ⏸ ) again to restart it.
When the playlist is running, an open green circle (Ο) will appear in the command that is currently running.
Commands that have finished their execution will have a closed green circle (•).
You cannot edit the playlist above commands that have finished their execution. You may edit all commands that have not yet executed.
If you wish to repeat a command (e.g. a Count), you must click and drag the command again from the Execution tab to the Launch Pad.