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 Re: How do you define facing length?
Author: kdk ★2017
Date:   2022-09-30 17:04

JTJC wrote:

> From my measurements an18/19mm facing using the feeler guage
> method equates to around 21/22mm using the absolute method.
> Certainly into German territory.
>
> There are also two methods of measuring tip opening, one using
> the inside edge of the tip rail and the other the external edge
> of the tip rail. Here again can you'll get a difference of
> around 1mm depending on which you use.
>
1 mm? that's double (or nearly) the advertised opening of most close-tipped facings. How do you measure the distance from the outside of the tip rail? A depth gauge across the tip to a glass? You can't use a taper gauge - if the tip rail is angled or curved back from the plane of the table your gauge will stop at the inner rail edge. I do have a couple of dial gauges that I can set (precariously) at the outside of the tip rail, and they do give larger dimensions than a taper gauge (but not as much as a millimeter). But I always feel that the seating of the gauge's probe on the edge of the rail is unreliable.

It's true that it would be helpful to know which way the mouthpiece maker or refacer is measuring his tip openings.

> It makes far more sense to move the the absolute method. CNC
> mouthpieces have to be made that way as you have to program
> the machine where to start its cut. That's the future.

I understand that a machine can be programmed to start a curve at a particular point and a manufacturer can then advertise that point as the curve length. But for hand measurement by end users or by hand finishers, how would you find that point? Any feeler however thin will stop short of the true, "absolute" method. So, the usefulness of measurement by feeler will probably continue for the purposes of comparison among mouthpieces until some kind of easily affordable and convenient gauge replaces it. No?

Karl
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 Topics Author  Date
 How do you define facing length?  new
Dan Shusta 2022-09-30 08:14 
 Re: How do you define facing length?  new
JTJC 2022-09-30 16:30 
 Re: How do you define facing length?  new
kdk 2022-09-30 17:04 
 Re: How do you define facing length?  new
Mojo 2022-09-30 17:51 
 Re: How do you define facing length?  new
kdk 2022-09-30 18:10 
 Re: How do you define facing length?  new
Hunter_100 2022-09-30 18:30 
 Re: How do you define facing length?  new
Hunter_100 2022-09-30 19:08 
 Re: How do you define facing length?  new
kdk 2022-09-30 21:49 
 Re: How do you define facing length?  new
Dan Shusta 2022-09-30 22:40 
 Re: How do you define facing length?  new
Mojo 2022-10-01 16:33 
 Re: How do you define facing length?  new
JTJC 2022-10-01 20:48 
 Re: How do you define facing length?  new
kdk 2022-10-01 21:23 
 Re: How do you define facing length?  new
Dan Shusta 2022-10-02 03:42 
 Re: How do you define facing length?  new
JTJC 2022-10-02 14:48 
 Re: How do you define facing length?  new
Dan Shusta 2022-10-03 02:03 
 Re: How do you define facing length?  new
Dan Shusta 2022-10-03 02:25 
 Re: How do you define facing length?  new
Mojo 2022-10-03 17:33 
 Re: How do you define facing length?  new
JTJC 2022-10-03 20:47 
 Re: How do you define facing length?  new
Paul Aviles 2022-10-03 23:19 
 Re: How do you define facing length?  new
Dan Shusta 2022-10-04 01:08 
 Re: How do you define facing length?  new
JTJC 2022-10-04 17:38 
 Re: How do you define facing length?  new
Dan Shusta 2022-10-04 20:23 
 Re: How do you define facing length?  new
Dan Shusta 2022-10-10 03:27 
 Re: How do you define facing length?  new
Dan Shusta 2022-10-10 03:30 
 Re: How do you define facing length?  new
Paul Aviles 2022-10-10 04:43 
 Re: How do you define facing length?  new
Dan Shusta 2022-10-10 06:13 
 Re: How do you define facing length?  new
Paul Aviles 2022-10-10 07:32 
 Re: How do you define facing length?  new
Mojo 2022-10-10 17:23 


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