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October 2007

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Subject:
Re: Trimming left over excess "mouse bites"
From:
"Thayer, Wayne" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Thayer, Wayne
Date:
Wed, 24 Oct 2007 22:11:05 -0400
Content-Type:
text/plain
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text/plain (59 lines) 
I use a $100 wood chisel grinder for this.  The horizontal wheel turns at about 400RPM, which is perfect for removing material quickly but still being under good control.  Also, its designed for wet grinding, so the wheel doesn't load up too quick.  I retrofitted this grinder with a $300 320 grit resin backed diamond tool sharpening wheel, which needed a little adapter to get it right.  We need to clean the wheel, but pretty rarely.
 
Wayne Thayer

________________________________

From: TechNet on behalf of West, Jim
Sent: Wed 10/24/2007 6:09 AM
To: [log in to unmask]
Subject: Re: [TN] Trimming left over excess "mouse bites"



Looking for any IPC standards or information concerning the removal of
excess board material left behind after depanelization, especially
breakaway/mouse bites?  We have a situation where the left over material
causes the board dimensions to be out of tolerance, and was trying to
determine the best way to remove, and if there are any specific
standards we should adhere to.

Thanks,



Jim West
Engineering Manager
Nexergy Inc.
www.nexergy.com
tel: (614) 351-6216
fax: (614) 324-1979



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