The Clarinet BBoard

Re: Checking mpc table/curve accuracy

Author: Bob Bernardo  Date:   2017-04-19 20:41 Excellent advice! Even the ground glass can be off. I have several ground glass gauges and only use 1 to check mouthpieces. It must be 35 years old. There is something called the French Curve and for the inexperienced refacers I'd strongly suggest learning how to put on a French Curve to a mouthpiece. It can surely help make the table and the facing very accurate. It may sound weird, slightly gross, but wipe the table of the mouthpiece on your forehead area were there is some natural skin oil and then press down the glass onto the mouthpiece. You should see these gaps a lot easier, which Dan talks about. Getting a flat table takes years of hard work/study. So a French Curve often solves your problems. I'm more concerned about the rails measuring evenly with a nice curve. A lot of or most refacers screw this up and there are bumps in the curves. When you magnify the mouthpiece facing 20 times you can see how badly or how good the curve really is, how the facing may have warped through the years. That curve is so important and a refacer can't see it unless he/she magnifies it. Almost always it is off somewhere. Sorry fellow refacers, I've seen the results. I made a computerized machine to adjust facings using ultra fine diamond dust because of these issues. Yes refacing mouthpieces is that hard. Designer of - Vintage 1940 Cicero Mouthpieces and the La Vecchia mouthpieces Yamaha Artist 2015 Post Edited (2017-04-19 20:42)

Topics	Author	Date
Checking mpc table/curve accuracy  new	Dan Shusta	2005-12-26 00:07
Re: Checking mpc table/curve accuracy  new	Bob Phillips	2005-12-26 16:50
Re: Checking mpc table/curve accuracy  new	fskelley	2017-04-19 17:40
Re: Checking mpc table/curve accuracy  new	Jeroen	2017-04-19 18:22
Re: Checking mpc table/curve accuracy  new	fskelley	2017-04-19 18:51
Re: Checking mpc table/curve accuracy  new	Bob Bernardo	2017-04-19 20:41
Re: Checking mpc table/curve accuracy  new	shmuelyosef	2017-04-19 20:58
Re: Checking mpc table/curve accuracy  new	kdk	2017-04-20 05:44
Re: Checking mpc table/curve accuracy  new	Wes	2017-04-20 07:32
Re: Checking mpc table/curve accuracy  new	Dan Shusta	2017-04-20 08:55
Re: Checking mpc table/curve accuracy  new	fskelley	2017-04-20 21:38
Re: Checking mpc table/curve accuracy  new	kdk	2017-04-20 23:14
Re: Checking mpc table/curve accuracy  new	fskelley	2017-04-21 03:23

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