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Motion and DC system architecture updates

Divya Kameswaran 

Stepper Motor Torque Calculations and Serial Impedance Matching

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Two new whitepapers were prepared to help resolve some commonly asked questions and points of confusion. 

  1. Stepper Motor Sizing: This page is intended to help determine the pullout torque required for a particular application, given some mechanical parameters. The page also covers the effect that microstepping has on the motor torque, and why it should not be used for increasing resolution. 
  2. Cable Impedance Mismatches: This page is intended to help evaluate the effects of an impedance mismatch between a signal's source, cable, and destination. Some mismatches are tolerable, while others are not. This page provides resources and a built in calculator to help with these evaluations.

Record of decision regarding Micronix systems

After much discussion and evaluation, a Record of Decision has been written regarding the use of Micronix piezo systems in future designs. This is discussed in more detail here, but is outlined below: 

  • The Micronix MMC-100 has a history of communication issues, requiring specialized controller knowledge, leading to a burden on operations.
  • The MMC-100 control has therefore been deemed EOL (end of life) in the Supported Devices List, and is considered to be legacy equipment. This means:
    • The MMC-100 may only be purchased to replace non-functional units that have already been put into operations.
    • Any units that are already in operations are strongly suggested to be replaced with LTS (long term support) equipment.
    • The MMC-100, even if the hardware is already in use in LCLS-I, may not be re-used in upcoming projects such as LCLS-II HE. 

Please direct any questions regarding this Record of Decision or the Supported Device List to ECS.Tyler Johnson 

NALMS

Federica Murgia 

The NALMS project has made significant strides in recent months, but the team faced some technical difficulties during the final phase of development. While the NALMS deployment in S3DF Kubernetes is almost complete, there are still some communication issues that need to be resolved. To track these issues, the team has created an epic ticket on Jira that outlines the remaining tasks that need to be completed in the coming weeks to achieve a full deployment.

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