Stage

A stage is an actuator, that can be configured to get and set its position.

Refreshing time

In order to retrieve the position of the stage regularly, a refreshing time is set to 200 milliseconds by default. This value can be changed in the configuration file through the “camera.refresh_interval”.

PyStage support

PyStage is a Python module developed by the Donjon.

The project is hosted in [this repository](https://github.com/Ledger-Donjon/pystages), and its documentation is available [here](https://pystages.readthedocs.io/en/latest/).

Laser studio uses this module to support following stages as main stage:

• Corvus

REST Stage

If you have a service providing stage control with a REST interface, you can use it to use as a Stage object in Laser Studio

In the configuration file, specify the type of the stage as “REST” and specify also the host, the port and the path of the URL to get the position and motion state to be retrieved and the position to set by Laser Studio.

Note that the fetching of the position and motion state may take a certain time due to network latency. This is why the refreshing time is set to higher that the default one.

Unit factors

Laser studio expects stages to give their position in micrometers. If your positioning system gives data to another unit, you can specify unit factors for each axes in the configuration file with the “stage.units_factors” with the value that will be multiplied to any value given by your positioner.

For instance if you 2 axis-stage gives values in millimeters, refer in your configuration file:

stage:
    enable: true
    type: Corvus
    units_factors: [1000.0, 1000.0]