[CAUT] Black on Black... (Jack alignment)

[David M. Porritt]

Jim:

 

In reality we have set the distal edge of the jack lined up with the distal
edge of the knuckle core "because we've been told to do it that way."  The
job we're really trying to do is set the jack so that it's far enough under
the knuckle never to cheat, yet close enough to escapement not to drag
across the knuckle any more than necessary.  This method should accomplish
that goal better than lining up the edges.  Depending on the straightness of
the knuckles, or uneven knuckle wear it might indeed result in a crooked
jack line but they should function better than the arbitrary method.  

 

dave

 

____________________

David M. Porritt, RPT

dporritt at smu.edu

 

  _____  

From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Jim
Busby
Sent: Monday, August 06, 2007 4:50 PM
To: College and University Technicians
Subject: Re: [CAUT] Black on Black... (Jack alignment)

 

Hi Jon,

 

You know, my gut feeling tells me that this (white out) will work and solve
my immediate problem. However, have you tried the "feel" method Michael W.
wrote about? I've used that method to check for cheating jacks, but have
never set jack position with it. I'm wondering if this "feel" of the jack
will be as accurate (or more) for touch as the sight method. Once again,
asking a simple question like this has caused me to examine my own long-used
techniques. His experience is more vast than mine so. I'm off to experiment!


 

Regards,

Jim Busby

 

  _____  

From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of Jon
Page
Sent: Monday, August 06, 2007 1:58 PM
To: caut at ptg.org
Subject: [CAUT] Black on Black... (Jack alignment)

 

It's just the plane of the jack that I can't see.

 

Put some White Out or white finger nail polish

on the back edge of the jack.

 

I like to sight down the core of the adjacent knuckle

and the bring the jack abeam of it.

-- 


Regards,

Jon Page

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