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

[David Ilvedson]

That sounds like a good idea...I'll try it.  Will height of jack in the window effect this adjustment?   i.e. should you adjust the height first?   I've been using the touch method taught by Yamaha and others...the window edge should feel like the edge of a piece of paper when the jack is the right height.  In the past I've always used the feel of the jack rubbing against the knuckle and the jack fully returning under the knuckle on release...



David Ilvedson, RPT

Pacifica, CA 94044









Original message

From: "Michael Wathen" 

To: "College and University Technicians" 

Received: 8/5/2007 7:41:42 AM

Subject: Re: [CAUT] Black on Black... (Jack alignment)





I learned how to do it completely by feel.  I believe I learned the following method from Garlick.  

1. Pull the action out and on to the key bed just far enough so that all the hammers are blocked in their travel when depressed by the key by the superposition of the pinblock over the hammers.  

2.  Turn the screw adjustment on the jack lever to the point where you can just get the jack to skip out from under the knuckle.

3.  Turn the screw adjustment the other direction to the point where the jack will again remain blocked under the knuckle without skipping out.

This is the ideal adjustment.  It positions the jack where is will have to do the least amount of required work; one more thing you can do to maximize the efficiency of the action.

Michael Wathen

Retired tech

-----Original Message-----

From: caut-bounces at ptg.org [mailto:caut-bounces at ptg.org]On Behalf Of Ted Sambell

Sent: Saturday, August 04, 2007 11:06 PM

To: College and University Technicians

Subject: Re: [CAUT] Black on Black... (Jack alignment)





Jim,

I don't know if it will work for you, but Denis Brassard, who was my colleague at the Banff Centre came up with an idea I think was brilliant. On the computer, you type out a page consisting entirely of lines double or triple spaced, using the underline. Next, print this out on a transparency and cut it into strips, each having one line and 1/2' or so wide.. To use, lay a strip on the repetition levers ( balanciers) and carefully adjust two jacks to the knuckles at each end of the line and bring the line of the transparancy to the adjusted jacks. Lay all the shanks down to hold the strip in place, and only raise one at a time to adjust the jack. The strip is moved along as needed. I have poor vision (myopia) and this works beautifully for me, but not all eye conditions are the same. European actions have a line on the lever surface to bring the jacks to, but I cannot recall if Kawai has too.

Ted Sambell

----- Original Message ----- 

From: Jim Busby 

To: College and University Technicians 

Sent: Saturday, August 04, 2007 9:20 PM

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





List, Don


Help! Do any of you have a trick for seeing the new Kawai parts, namely for doing the jack to knuckle alignment? I truly can’t see the black parts/plane of the jack. (My eyes are bad, but this is way worse for me) I’ve got some good lights and such, but it’s still difficult. I’ve been tempted to paint white-out on the backs of the jacks
 Love the parts, but these old eyes don’t get it done anymore.

Any tricks out there? Am I the only one experiencing this?

Thanks,

Jim Busby BYU
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