6 replies to this topic

[richard]

Hello

One of my old buttons broke yesterday and when I replaced it with another button (until I can get a real replacement)suddenly the pad is not shutting completely as it did before. I suppose some friction is happening somewhere? The button seems to be the same circumference as the old one.

Any other ideas?

Thanks,

Richard

Edited by richard, 11 May 2012 - 10:32 AM.

[Geoffrey Crabb]

Hello

One of my old buttons broke yesterday and when I replaced it with another button (until I can get a real replacement)suddenly the pad is not shutting completely as it did before. I suppose some friction is happening somewhere? The button seems to be the same circumference as the old one.

Any other ideas?

Thanks,

Richard

The bushing felt within the button is probably too thick restricting movement of the lever.

A warmed, tapered smooth bradawl inserted gently and cautiously through the center of the bushing with a twisting action should enlarge the hole in the bushing giving more clearance.
Care must be taken not to force the bradawl through the bushing to avoid breaking the button if made of wood, bone or 'plastic'.

Geoffrey

[Greg Jowaisas]

Richard,
Also check the alignment of the lever arm. With the button off the lever arm should bisect the guide pin hole when viewed from above. If necessary gently adjust that half of the arm with two pairs of pliers being careful never to allow the pivot and rivet to be stressed.

And it wouldn't hurt to burnish the fretwork bushing a bit as well.

Greg

[wes]

Richard,

i would venture to say that the pin of your replacement button could be binding slightly in the action board. all you need to do is compare the broken one with the new one. you can file the pin diameter down a little with a nail file and off you go. course, you could just play one of your other concertinas. hmmm which one today? so many decisions!

[Geoffrey Crabb]

See attachmment.
[attachment=7600:Lever bushings.doc]

[richard]

Hi

Thanks a lot for the good ideas. Last night I checked it out again and fiddled about to no avail. I thought maybe it was the spring having contact with the riveted pivot. But the spring must have been like that before the old button broke.

I will try the your suggestions.

Wes... we miss you in SF.

RICHARD

[richard]

Hello

Compacting the felt bushing inside the hole worked.

Now I have another problem with the spring swinging parallel to the arm which is very short. The spring contacts the pad and rubs on the rivet. I will post this as a new posting.

Thanks,

Richard