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Operating the VELO Motion System while being under vacuum

Make sure the PVSS-project "VEDCS_VacMot" is running under "velo_user" on "vedcs02w". If not, start it and also start via "Vision" the panel G:\velo\pvss\VELO_VacuumMotion\panels\VeloMotionUI_Main.pnl


A number of conditions has to be satisfied in order to be able to move the VELO-detectors.

  • the 2 red emergency mushroom buttons of the stepping motors in rack C3B03 on platform C3 have to be pulled to the out-position,
  • all 3 coordinates of the system have to be in "Referenced"-mode, as depicted in the panel above, (if not the system first has to be referenced),
  • the motion-PLC has to be in "remote" mode,
  • there should be no interlock from the vacuum system,
  • LHC should be in the state "Movable devices Allowed", otherwise the beam will get dumped when moving away from the "out"-position.

The VELO closing procedure, which contains a password verification procedure at each step, has be followed till further notice.

The actual readings and a lot more can be seen at the Motion pages on the PLC-screen in rack C3B05 on platform C3. However, access to these pages is password protected.

-- EddyJans - 31 Jul 2008

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JPEGjpg pvss.motionscreen.jpg r1 manage 102.6 K 2008-07-31 - 15:23 EddyJans  
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Topic revision: r2 - 2008-07-31 - EddyJans
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