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This section documents the set-up and the operation of the XY stages (one for the ring and the other for the stave) in the QC test box.

Contacts:

• Valentina Cairo (cairo@slac.stanford.edu)
• Sanha Cheong

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• (sanha@slac.stanford.edu)
• Sam Krishnamurthy (skrishnamurt@umass.edu)
• Scott Newbry (newbry@slac

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• .stanford.edu)

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• Zhi Zheng (

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• zzheng@slac.stanford.edu)

Set-up

Overview

Individual Components

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1. Do NOT press the "Set Zero" buttons on the control software. This off-sets the previous settings, and the stages will have to be re-calibratedcalibration might be necessary.
2. Do NOT manually move any of the stages, unless you know what you are doing and it is necessary. Manual, forced movement also off-sets the previous settings, leading to re-calibration.
   These stages are already far from mechanically perfect, and no further damage is to be done.

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If any of the position or the scale values are listed below is significantly off, re-calibration is required. If re-calibration is required, please let the relevant team members know.

Note that the interlock positions are only accurate up to ~1mm tolerance. This is because the interlock switches are elastic and have O(1mm) sizes themselves.

"Home" Position

There is a "Home All" button on the control software. This moves the stage to the "home" position, which is one of the corners of the XY stage range.

Note that the home position is NOT defined in terms of some coordinate values, but as a physical position—it is defined to be ~5mm away from the hard limits set by the interlocks.

The current convention is that the home position of each stage is calibrated as (0, 0) position. If you home-positioned the stage, but the coordinate shown is not (0, 0), re-calibration is required.

Ring Stage

Shows up as `usb0` `FTDI USB to Serial /dev/ttyUSB0` on the `OpenBuilds CONTROL` software

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