TECHNET Archives

January 1997

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Date:
Fri, 17 Jan 1997 05:09:49 EST
Content-Type:
text/plain
Parts/Attachments:
text/plain (37 lines)

    \0
   TO:         I4235700 IBMMAIL   new address for ipc technet 25.6.96

   FROM:       DSTEWART EX2       D.Stewart        - Product Development Manager.

   DATE:       17 January 1997
   SUBJECT:    DRILL SPINDLE RUNOUT

    Most modern drilling machines use lasers for checking tool diameter
    , broken drill detection and spindle runout. The spindle runout is
    checked dynamically, and typically will be run up the whole
    spectrum of rpm range. This also helps identify areas of resonance
    that should be avoided as speeds when drilling boards. The runout
    for the spindle should be checked using a 1/8" drill BLANK, the
    runout measured with different size tools is affected by the
    concentricity of the drill bit and may reflect more on poor tools
    than poor spindles.
    We run with a maximum of 4 tenths of a thou runout, cleaning
    collets, replacing collets or replacing spindles to bring the
    figure back down to below this level.
    Dougal Stewart
    Exacta Circuits
    Scotland

***************************************************************************
* TechNet mail list is provided as a service by IPC using SmartList v3.05 *
***************************************************************************
* To unsubscribe from this list at any time, send a message to:           *
* [log in to unmask] with <subject: unsubscribe> and no text.        *
***************************************************************************
* If you are having a problem with the IPC TechNet forum please contact   *
* Dmitriy Sklyar at 847-509-9700 ext. 311 or email at [log in to unmask]      *
***************************************************************************



ATOM RSS1 RSS2