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  Measurement, Test and Calibration
  Perpendicularity

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Author Topic:   Perpendicularity
Dawn
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Posts: 245
From:St. Marys, PA
Registered: Sep 98

posted 27 March 2001 09:25 AM     Click Here to See the Profile for Dawn   Click Here to Email Dawn     Edit/Delete Message   Reply w/Quote
Can someone give me some guidance on checking perpendicularity with something besides a CMM?

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DICKIE
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Posts: 46
From:Romulus, MI, USA
Registered: Feb 2001

posted 27 March 2001 10:53 AM     Click Here to See the Profile for DICKIE   Click Here to Email DICKIE     Edit/Delete Message   Reply w/Quote
Dawn,
Could you provide a little more information on what you are checking

Dickie

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Big Red
unregistered
posted 27 March 2001 01:03 PM           Edit/Delete Message   Reply w/Quote
We use a V-block and Indicator when we don't use the CMM.
We usually only use the CMM when we are checking parts for PPAP.

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Dawn
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From:St. Marys, PA
Registered: Sep 98

posted 28 March 2001 07:13 PM     Click Here to See the Profile for Dawn   Click Here to Email Dawn     Edit/Delete Message   Reply w/Quote
That's what we are using and putting a snug fitting pin in the ID of the gear and then running the indicator off the face. Are we on the right track? (Thanks!)

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Dawn
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Posts: 245
From:St. Marys, PA
Registered: Sep 98

posted 28 March 2001 07:13 PM     Click Here to See the Profile for Dawn   Click Here to Email Dawn     Edit/Delete Message   Reply w/Quote
That's what we are using and putting a snug fitting pin in the ID of the gear and then running the indicator off the face. Are we on the right track? (Thanks!)

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Steven Truchon
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Posts: 89
From:Fort Lauderdale, FL USA
Registered: Jul 2000

posted 29 March 2001 11:58 AM     Click Here to See the Profile for Steven Truchon   Click Here to Email Steven Truchon     Edit/Delete Message   Reply w/Quote
Assuming that the form of the hole is good enough to provide a stable datum axis and the hole/pin fit has no obvious play to distort your measurement, you are on a very solid track in my opinion.

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DICKIE
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Posts: 46
From:Romulus, MI, USA
Registered: Feb 2001

posted 29 March 2001 03:51 PM     Click Here to See the Profile for DICKIE   Click Here to Email DICKIE     Edit/Delete Message   Reply w/Quote
Steven is correct about the pin and hole. I believe this method is superior to almost any other. Just make sure every compoment of MTE is calibrated.

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Jeremy S
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posted 07 April 2001 01:38 AM           Edit/Delete Message   Reply w/Quote
If the item being checked is a simple right angle, you can check it with an indi-square and an indicator of the necessary accuracy. Setup the object to be checked on a surface plate, and run the indicator (attached to the indi-square) up and down the surface you are checking.

Any further questions on this method, email me at jscherbert@hayesbrake.com

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