Subject: RE: TAKENAKA
Date: Thu, 27 Jan 2000 00:02:41 -0600
From: "Rood, Omar" <Omar.Rood@mts.com>
To: "Imafuku, Nobuhiro" <Nobuhiro.Imafuku@mts.com>, "Larson, Rod"
     <Rod.Larson@mts.com>
CC: "Otsuka, Yutaka" <Yutaka.Otsuka@mts.com>

Hello Fuku,
You have had a response from me this week.
 I wrote that the oscillation problem can only be because pilot pressure
does not come on before main pressure.

Rod and I and Brad are in Hong Kong, today we leave for New Zealand.

This morning Rod said he would send you instructions on the load cell
later today.
Omar

> -----Original Message-----
> From: Imafuku, Nobuhiro
> Sent: Wednesday, January 26, 2000 8:42 AM
> To:   Larson, Rod
> Cc:   Rood, Omar; Otsuka, Yutaka
> Subject:      TAKENAKA
>
> Hello, ROD san.
>
> Are you in Minneapolis now ? Do you know where is OMAR now ? I have no
> response from OMAR this week.
> 1.    We check pilot pressure today and try to adjust low pressure.
> Finally, pilot pressure stay about 3000 psi when we supply low
> pressure then high pressure. Low pressure set about 500 psi. But we
> still have oscillation problem.
> 2.    As you already know, we have oscillation problem on both
> actuators. We try to find reason and to fix this problem now. During
> checking 100 ton actuator, we find "Valve Saturation Compensators"
> parameters are effect this problem especially X^4 & X^5 coefficient
> parameters. But, we are not sure this function. Please explain this
> function and we have some questions.
> 1)    We have two "Valve Saturation Compensators" panel, But, we are
> using "Servovalve A" only, so we do not to need to use "Servovalve B".
> 2)    Are these parameters related with "Flow Gain Compensator"
> parameter ? If "Flow Gain Compensator" gain set "0", are these
> parameters effect ?
>        << OLE Object: Picture (Metafile) >>
> 3.    We can succeed to download TestStar IIs software today. We find
> we need to change "Hardware Configuration" file. We will check more
> tomorrow.
> 4.    We still have calibration file problem. We can calibrate "LVDT"
> on-site if needed, but we can NOT calibrate "Load Cell" in Japan
> because we do NOT have 100 ton master load cell. TAKENAKA will start
> structure test on February 14th. So, we have time to send back
> Minneapolis and to calibrate both "Load Cell" in Minneapolis if we
> will send back until February 8th.
> Please reply any your comment by return.
>
> REGARDS     FUKU
>
