Subject: RE: B600 Install
Date: Wed, 8 Sep 1999 22:36:47 -0500
From: "Zappia, Tim" <Tim.Zappia@mts.com>
To: "Campbell, Craig L" <Craig.L.Campbell@mts.com>, "Larson, Rod"
     <Rod.Larson@mts.com>, "Thoen, Brad" <Brad.Thoen@mts.com>, "Ovsak, Grant"
     <Grant.Ovsak@mts.com>

These changes need to be implemented by October 11th, not the 18th.

> -----Original Message-----
> From: Campbell, Craig L
> Sent: Wednesday, September 08, 1999 4:54 PM
> To:   Larson, Rod; Thoen, Brad; Ovsak, Grant
> Cc:   Zappia, Tim
> Subject:      B600 Install
>
> This morning, Tim and I discussed the process we would like to use for
> installing the shims on the actuators .
>
> In order to do this without getting a crane, we need to have closed
> loop stroke control on an individual actuator.  The process would
> involve installing the maintenance struts with the safety pins
> installed.  Disconnect and cap the main pressure hose on the actuator
> to be shimmed. Install an external LVDT on the actuator for stroke
> feedback.  Untorque the lower swivel/actuator mounting screws.  Attach
> the lower maintenance strut hand winch to the actuator to support the
> bottom end.  Turn on Pilot Pressure ONLY to use the bearing leakage to
> power the piston rod.  While unscrewing the swivel screws, retract the
> piston rod to open a gap for shimming between the swivel and actuator.
> If swivel replacement is required, continue retracting and unscrewing
> until the actuator is disconnected.  Reverse the process to tighten
> the screws.
>
> Brad, you mentioned it is possible to set up the controller to do
> independent control of any actuator.  The twist is that we want to
> used the externally mounted LVDT as the feedback to the controller.
> We should be able to borrow an LVDT from the flow bench, can you make
> the controller changes required to use the LVDT?  Note that we would
> need to map the external LVDT to any of the six actuators without
> changing any other cables.
>
> Grant, Please check to see if any AC conditioners are available for
> closing the loop with the LVDT.  If not, we will have to borrow one
> (plus a spare?).
>
> These controller changes need to be implemented by October 18 to allow
> us to meet the schedule for the installation.
>
> Please get back to Tim and I to let us know if this is going to work.
>
> Craig
