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January 2003

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Subject:
From:
Mark Hargreaves <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Thu, 30 Jan 2003 15:10:20 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (141 lines)
18"x24".  The tech was having trouble with his equipment, which accounts for
some of the time.

        -----Original Message-----
        From:   Randy Bock Sr. [SMTP:[log in to unmask]]
        Sent:   Thursday, January 30, 2003 3:00 PM
        To:     TechNet E-Mail Forum.; Mark Hargreaves
        Subject:        Re: [TN] Calibration/Verification of granite-surface
block

        4 hours.   What size is the plate ??

        ----- Original Message -----
        From: "Mark Hargreaves" <[log in to unmask]>
        To: <[log in to unmask]>
        Sent: Thursday, January 30, 2003 2:34 PM
        Subject: Re: [TN] Calibration/Verification of granite-surface block


        > Calibration company came in to do it.  They used a "leveling
system" which
        > arrived in 3 large equipment cases.  Took them more than 4 hrs. as
I
        recall.
        >
        > The original certificate of accuracy indicates that the
manufacturer
        > calibrated the granite headstone (surface plate) using a "Watts
        > Auto-Collimator".
        >
        > Mark
        >
        >         -----Original Message-----
        >         From:   Franklin D Asbell
[SMTP:[log in to unmask]]
        >         Sent:   Thursday, January 30, 2003 2:19 PM
        >         To:     TechNet E-Mail Forum.; Mark Hargreaves
        >         Subject:        Re: [TN] Calibration/Verification of
        granite-surface
        > block
        >
        >         We'll be using this one for the same purpose, do you
calibrate
        > in-house? If
        >         so, what do you use to verify it...thanks...
        >
        >         Franklin
        >
        >
        >         ----- Original Message -----
        >         From: "Mark Hargreaves" <[log in to unmask]>
        >         To: <[log in to unmask]>
        >         Sent: Thursday, January 30, 2003 10:31 AM
        >         Subject: Re: [TN] Calibration/Verification of
granite-surface
        block
        >
        >
        >         > Hi Franklin,
        >         > Our granite surface plate is used strictly for warp &
twist
        > measurement of
        >         > pcb's (very light use).  It's on our recall list.  The
        calibration
        > is
        >         rather
        >         > expensive.  I was able to move from yearly cal to 3 year
cal by
        >         downgrading
        >         > the plate from "A" (inspection grade) to "B" (shop
grade, I
        > believe) which
        >         > is still well within our accuracy requirements.
        >         >
        >         > Regards,
        >         > Mark Hargreaves
        >         >
        >         >         -----Original Message-----
        >         >         From:   Franklin D Asbell
        > [SMTP:[log in to unmask]]
        >         >         Sent:   Thursday, January 30, 2003 10:57 AM
        >         >         To:     [log in to unmask]
        >         >         Subject:        [TN] Calibration/Verification of
        > granite-surface
        >         > block
        >         >
        >         >         Can anyone describe to me the method of
        > calibrating/verifying a
        >         > surface
        >         >         block???
        >         >
        >         >         Also, in regards to calibration recall, would
this need
        to
        > be on a
        >         > recall
        >         >         list or would it be verify it once in it's
lifetime,
        what
        > would be
        >         a
        >         > cause
        >         >         of initial calibration being voided...
        >         >
        >         >         Thanks,
        >         >
        >         >         Franklin D Asbell
        >
        >
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