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

[Jim Busby]

Dave,

 

You're absolutely right. In the spirit of "question everything" (Thanks
Ron) we should see if the textbook setting of the jack is THE best way.
On older parts I've had to align the jack/knuckle back a bit (note: only
on specific notes) because the jacks would cheat, and on newer parts
I've actually gone a bit forward to get the right feel. Maybe our
"visually impaired" friends have it right...

 

I'm going to do some experimenting.

 

Regards,

Jim

 

________________________________

From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org] On Behalf Of
David M. Porritt
Sent: Monday, August 06, 2007 5:07 PM
To: 'College and University Technicians'
Subject: Re: [CAUT] Black on Black... (Jack alignment)

 

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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